fzus61 kbuf 230803
glflo 
expires:202605231500;;499167

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat may 23 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a large 30.4 inch high will strengthen to 30.6 inches as 
it anchors over atlantic canada through sunday. a 29.9 inch low and 
attendant warm front will then approach the lower great lakes late 
tonight and saturday, before weakening and sliding eastward sunday. 
a 30.1 inch high will settle across the region monday through 
tuesday. a cold front associated with a 29.8 inch low over new 
england will drop south across the lake on wednesday. high pressure 
over canada will start to expand south over the lake on thursday.


loz062-231500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sat may 23 2026

.today...east winds 10 to 15 knots increasing to 15 to 25 knots.
a chance of rain early, then rain from late morning on. waves
3 to 5 feet building to 4 to 7 feet. waves occasionally around
9 feet. 
.tonight...east winds 15 to 25 knots. showers. waves 5 to 8 feet
subsiding to 3 to 6 feet. waves occasionally around 10 feet. 
.sunday...east winds 15 to 20 knots diminishing to 5 to 15 knots.
showers in the morning, then a chance of showers in the
afternoon. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.sunday night...east winds less than 10 knots. a chance of
showers. waves 1 foot or less. 
.monday...light and variable winds. a chance of showers during
the day. waves 1 foot or less. 
.tuesday...southwest winds 10 knots or less becoming west. waves
1 foot or less. 
.wednesday...west winds 10 knots or less becoming north. waves
1 foot or less. 

$$

fzus61 kbuf 230803
glflo 
expires:202605231500;;499168

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sat may 23 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a large 30.4 inch high will strengthen to 30.6 inches as 
it anchors over atlantic canada through sunday. a 29.9 inch low and 
attendant warm front will then approach the lower great lakes late 
tonight and saturday, before weakening and sliding eastward sunday. 
a 30.1 inch high will settle across the region monday through 
tuesday. a cold front associated with a 29.8 inch low over new 
england will drop south across the lake on wednesday. high pressure 
over canada will start to expand south over the lake on thursday.


loz063>065-231500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sat may 23 2026

.today...southeast winds 10 to 15 knots increasing to 15 to
20 knots. a chance of rain late this morning. rain this
afternoon. waves 1 to 3 feet building to 3 to 5 feet. 
.tonight...southeast winds 15 to 25 knots. showers. waves 3 to
6 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet.
waves occasionally around 9 feet. 
.sunday...southeast winds 15 to 25 knots. showers. waves 3 to
5 feet subsiding to 2 to 4 feet. 
.sunday night...southeast winds 15 to 20 knots becoming south
10 to 15 knots. a chance of showers overnight. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.monday...southwest winds 10 knots or less. a chance of showers
during the day. waves 1 foot or less. 
.tuesday...southwest winds 5 to 10 knots becoming west. waves
1 foot or less. 
.wednesday...west winds 5 to 10 knots becoming north. waves
1 foot or less. 

$$

fzus61 kcle 230759
glfle 
expires:202605231415;;498931

open lake forecast for lake erie
national weather service cleveland oh
359 am edt sat may 23 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
low pressure 29.90 inches moves northeastward into the western
basin of lake erie saturday with a weak cold front saturday night
into early sunday. a weak trough averaging 30.00 inches will pass
over the region on sunday. high pressure 30.10 inches builds into
the region early monday through the middle of next week.


lez162-163-231415-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
359 am edt sat may 23 2026

.today...east winds 15 to 25 knots becoming south. showers with a
slight chance of thunderstorms early, then showers with a chance
of thunderstorms. showers likely with a slight chance of
thunderstorms late. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.tonight...south winds 5 to 15 knots becoming southwest. a chance
of showers early. waves 1 to 3 feet subsiding to 1 foot or less. 
.sunday...southwest winds less than 10 knots becoming southeast.
showers likely in the afternoon. waves 1 foot or less. 
.sunday night...southeast winds 10 knots or less becoming
northwest. showers likely in the evening. waves 1 foot or less. 
.monday...north winds less than 10 knots becoming south. waves
1 foot or less. 
.tuesday...south winds less than 10 knots becoming east. waves
1 foot or less. 
.wednesday...northeast winds 10 knots or less. waves 2 feet or
less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230759
glfle 
expires:202605231415;;498932

open lake forecast for lake erie
national weather service cleveland oh
359 am edt sat may 23 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
low pressure 29.90 inches moves northeastward into the western
basin of lake erie saturday with a weak cold front saturday night
into early sunday. a weak trough averaging 30.00 inches will pass
over the region on sunday. high pressure 30.10 inches builds into
the region early monday through the middle of next week.


lez164>168-231415-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
359 am edt sat may 23 2026

.today...east winds 15 to 25 knots becoming southeast. showers
with a slight chance of thunderstorms this morning, then a chance
of showers with a slight chance of thunderstorms early this
afternoon. showers likely with a slight chance of thunderstorms
late. waves 3 to 6 feet. 
.tonight...southeast winds 15 to 25 knots becoming south. showers
likely with a slight chance of thunderstorms early, then a chance
of showers late in the evening. a slight chance of showers after
midnight. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.sunday...southwest winds 5 to 15 knots becoming northeast less
than 10 knots. a chance of showers in the afternoon. waves 1 to
3 feet subsiding to 1 foot or less. 
.sunday night...southeast winds less than 10 knots becoming
northwest. a chance of showers. waves 1 foot or less. 
.monday...north winds less than 10 knots. waves 1 foot or less. 
.tuesday...south winds less than 10 knots becoming southeast.
waves 1 foot or less. 
.wednesday...light and variable winds becoming northeast 5 to
10 knots. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230759
glfle 
expires:202605231415;;498933

open lake forecast for lake erie
national weather service cleveland oh
359 am edt sat may 23 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...
low pressure 29.90 inches moves northeastward into the western
basin of lake erie saturday with a weak cold front saturday night
into early sunday. a weak trough averaging 30.00 inches will pass
over the region on sunday. high pressure 30.10 inches builds into
the region early monday through the middle of next week.


lez061-169-231415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
359 am edt sat may 23 2026

.today...east winds 15 to 25 knots becoming southeast. showers
with a slight chance of thunderstorms through early afternoon,
then a chance of showers with a slight chance of thunderstorms
late. waves 2 to 4 feet building to 3 to 5 feet. 
.tonight...southeast winds 15 to 25 knots becoming south. showers
likely with a slight chance of thunderstorms early, then showers
likely late in the evening. a chance of showers after midnight.
waves 3 to 6 feet subsiding to 2 to 4 feet. 
.sunday...south winds 15 to 20 knots becoming west and
diminishing to less than 10 knots in the afternoon. a chance of
showers in the afternoon. waves 1 to 3 feet subsiding to 1 foot
or less. 
.sunday night...light and variable winds. a chance of showers.
waves 1 foot or less. 
.monday...light and variable winds. waves 1 foot or less. 
.tuesday...light and variable winds. waves 1 foot or less. 
.wednesday...light and variable winds becoming northeast 5 to
10 knots. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 230750
glfsc 
expires:202605231600;;498817

lake st clair forecast
national weather service detroit/pontiac mi
350 am edt sat may 23 2026

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...low pressure, 29.90 inches, tracks from the ohio
valley into lake huron this weekend. breezy east flow this
evening and tonight becomes westerly with the passage of the low
late saturday. rain and a few thunderstorms possible this
weekend, especially saturday morning.


lcz460-231600-
lake st clair-
350 am edt sat may 23 2026

...small craft advisory in effect through this evening...

.today...east winds to 30 knots diminishing to 20 to 25 knots in the
afternoon. gusts to 35 knot gales. showers. waves 3 to 5 feet. waves
occasionally around 7 feet.
.tonight...southeast winds 15 to 20 knots becoming south 10 to 15
knots late in the evening...then veering to the southwest after
midnight diminishing to 5 to 10 knots early in the morning. mostly
cloudy. a chance of light showers in the evening. waves 1 to 3 feet.
.sunday...light and variable winds becoming south 5 to 10 knots
early in the afternoon. mostly cloudy. a chance of light showers
early in the afternoon. waves 2 feet or less.
.sunday night...south winds 5 to 10 knots early in the evening
becoming light and variable. mostly cloudy with a chance of light
showers early in the evening...then partly cloudy in the late
evening and overnight. waves 2 feet or less.
.monday...light and variable winds becoming south 5 to 10 knots in
the evening. mostly sunny becoming partly cloudy. waves nearly calm.
.tuesday...southwest winds 5 to 10 knots. partly cloudy. waves 2
feet or less.
.wednesday...northeast winds 5 to 10 knots. partly cloudy. waves 2
feet or less.

$$

fzus63 kdtx 230749
glflh 
expires:202605231600;;498815

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 am edt sat may 23 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...low pressure, 29.90 inches, tracks from the ohio
valley into lake huron this weekend. breezy east flow this
evening and tonight becomes westerly with the passage of the low
late saturday. rain and a few thunderstorms possible this
weekend, especially saturday morning.


lhz462>464-231600-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
349 am edt sat may 23 2026

.today...east winds 15 to 20 knots with gusts to around 30 knots
increasing to 20 to 25 knots with gusts to around 30 knots in the
afternoon. showers. waves 5 to 7 feet. waves occasionally around
10 feet. 
.tonight...east winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots after midnight...then
becoming south 10 to 15 knots early in the morning. showers in
the evening...then a chance of showers after midnight. waves 5 to
7 feet. waves occasionally around 10 feet. 
.sunday...southwest winds 5 to 10 knots backing to the southeast
early in the afternoon. a chance of showers in the afternoon.
waves 2 to 4 feet subsiding to 2 feet or less in the late morning
and afternoon. 
.sunday night...east winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.monday...light and variable winds becoming southwest 5 to
10 knots late in the morning...then backing to the south late in
the afternoon. waves 2 feet or less. 
.tuesday...light and variable winds becoming southwest 5 to
10 knots. waves 2 feet or less. 
.wednesday...northwest winds 5 to 10 knots veering to the north.
waves 2 feet or less. 


$$

fzus63 kdtx 230749
glflh 
expires:202605231600;;498814

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 am edt sat may 23 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...low pressure, 29.90 inches, tracks from the ohio
valley into lake huron this weekend. breezy east flow this
evening and tonight becomes westerly with the passage of the low
late saturday. rain and a few thunderstorms possible this
weekend, especially saturday morning.


lhz363-231600-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
349 am edt sat may 23 2026

.today...east winds 15 to 20 knots. gusts to 30 knots late in the
afternoon. a chance of showers in the morning...then showers
likely in the afternoon. waves 4 to 6 feet. 
.tonight...east winds 15 to 20 knots with gusts to around
30 knots decreasing to 5 to 10 knots. showers in the evening...
then a chance of showers after midnight. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.sunday...southwest winds 5 to 10 knots backing to the south
early in the afternoon. waves 3 to 5 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.sunday night...southeast winds 5 to 10 knots early in the
evening becoming light and variable. waves 2 feet or less. 
.monday...light and variable winds becoming south 5 to 10 knots.
waves 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...northwest winds 5 to 10 knots veering to the north.
waves 2 feet or less. 


$$

fzus63 kdtx 230749
glflh 
expires:202605231600;;498813

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 am edt sat may 23 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...low pressure, 29.90 inches, tracks from the ohio
valley into lake huron this weekend. breezy east flow this
evening and tonight becomes westerly with the passage of the low
late saturday. rain and a few thunderstorms possible this
weekend, especially saturday morning.


lhz361-362-231600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
349 am edt sat may 23 2026

.today...east winds 20 to 25 knots with gusts to around 30 knots.
a chance of showers. waves 6 to 9 feet. waves occasionally around
12 feet. 
.tonight...east winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. showers likely in the
evening...then a chance of showers after midnight. waves 6 to
9 feet. waves occasionally around 12 feet. 
.sunday...east winds 5 to 10 knots. waves 3 to 5 feet subsiding
to 1 to 3 feet early in the afternoon. 
.sunday night...light and variable winds. waves 2 feet or less. 
.monday...light and variable winds becoming southeast 5 to
10 knots late in the morning...then becoming light and variable
late in the evening. waves 2 feet or less. 
.tuesday...light and variable winds becoming southwest 5 to
10 knots. waves 2 feet or less. 
.wednesday...north winds 5 to 10 knots until afternoon becoming
light and variable...then becoming northwest 5 to 10 knots by
midnight. waves 2 feet or less. 


$$

fzus63 kmkx 230803
glflm 
expires:202605231530;;499242

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
303 am cdt sat may 23 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

high pressure around 30.5 inches centered over quebec will slowly
move across the new england coast later today and tonight. meanwhile,
low pressure of 29.8 inches over the western ohio valley will move
to lake huron and southern ontario for tonight. modest to breezy
easterly winds will continue into this evening over far northern
lake michigan. elsewhere, light to modest east northeast winds
will turn northerly for this afternoon. the light winds will then
gradually turn southerly late tonight into sunday morning across
all of lake michigan. light to modest southerly winds are then 
likely for sunday through tuesday.


lmz261-362-364-366-563-565-567-868-231530-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
303 am cdt sat may 23 2026

sheboygan wi to pentwater mi north...

.today...east winds 15 to 25 kt becoming northeast. slight chance
of rain showers this morning. waves 4 to 6 ft occasionally to 8 
ft. 
.tonight...east winds 15 to 25 kt diminishing to 10 to 20 kt 
after midnight becoming southeast 10 to 15 kt late. patchy fog 
overnight. waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to 
3 ft. 
.sunday...south winds 5 to 10 kt increasing to 10 to 15 kt.
patchy fog in the morning. waves 1 to 2 ft. 
.sunday night...south winds 10 to 15 kt. waves 1 to 2 ft. 
.monday...south winds 10 to 20 kt. waves 1 to 2 ft building to
2 to 4 ft. 
.monday night...south winds 10 to 20 kt diminishing to 10 to
15 kt. waves 2 to 4 ft. 
.tuesday...southwest winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 2 ft. 
.wednesday...east winds 5 to 10 kt becoming northeast 10 to
20 kt. waves 1 to 2 ft.  

$$

fzus63 kmkx 230803
glflm 
expires:202605231530;;499243

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
303 am cdt sat may 23 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

high pressure around 30.5 inches centered over quebec will slowly
move across the new england coast later today and tonight. meanwhile,
low pressure of 29.8 inches over the western ohio valley will move
to lake huron and southern ontario for tonight. modest to breezy
easterly winds will continue into this evening over far northern
lake michigan. elsewhere, light to modest east northeast winds
will turn northerly for this afternoon. the light winds will then
gradually turn southerly late tonight into sunday morning across
all of lake michigan. light to modest southerly winds are then 
likely for sunday through tuesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-231530-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
303 am cdt sat may 23 2026

sheboygan wi to pentwater mi south...

.today...northeast winds 10 to 20 kt becoming north 10 to 15 kt.
patchy fog this morning. slight chance of rain showers this
morning. waves 1 to 3 ft. 
.tonight...northeast winds 5 to 10 kt veering to southeast.
patchy fog overnight. slight chance of rain showers and
thunderstorms overnight. waves 1 to 2 ft. 
.sunday...southeast winds less than 10 kt increasing to 5 to
10 kt. patchy fog in the morning. chance of rain showers in the
morning. waves 1 to 2 ft. 
.sunday night...south winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.monday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft building to 2 to 4 ft. 
.monday night...south winds 10 to 15 kt diminishing to 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.tuesday...south winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.wednesday...east winds 5 to 10 kt becoming northeast 10 to
20 kt. waves 1 ft or less building to 1 to 2 ft.  

$$

fzus63 kmqt 230801
glfls 
expires:202605232000;;499061

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat may 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

lake superior is currently between a 30.6 inch high over quebec and 
a pair of 29.9 inch lows, one south of the michigan lower peninsula 
and one over the east half of the dakotas. through today, the lows 
weaken to remnant 30.0 inch troughs over the upper great lakes while 
the high shifts over nova scotia. sunday, lake superior will be 
between the high, now off the canada coast, and broad 29.6 inch low 
pressure over saskatchewan. a 30.1 inch ridge forms monday over the 
lower great lakes as the low retreats to alberta. monday night, a 
29.8 inch trough will be over northern ontario, with the high slowly 
moving southeast tuesday. by tuesday night, a 30.2 inch high over 
the western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz266-232000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
400 am edt sat may 23 2026

.early this morning...east winds 15 to 25 knots. waves 2 to
4 feet. 
.today...east winds 15 to 25 knots veering southeast in the
afternoon, then increasing to 20 to 30 knots late. a slight
chance of rain showers. a slight chance of thunderstorms by mid
afternoon. waves building to 4 to 7 feet occasionally to 9 feet. 
.tonight...southeast winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to 2 to
4 feet. 
.sunday...south winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. waves subsiding to calm to 2 feet. 
.sunday night...south winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.monday...southwest winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.monday night...south winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. waves calm to 2 feet. 
.tuesday...northwest winds 5 to 15 knots veering east. waves calm
to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves calm to 2 feet.

$$

fzus63 kmqt 230801
glfls 
expires:202605232000;;499062

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat may 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

lake superior is currently between a 30.6 inch high over quebec and 
a pair of 29.9 inch lows, one south of the michigan lower peninsula 
and one over the east half of the dakotas. through today, the lows 
weaken to remnant 30.0 inch troughs over the upper great lakes while 
the high shifts over nova scotia. sunday, lake superior will be 
between the high, now off the canada coast, and broad 29.6 inch low 
pressure over saskatchewan. a 30.1 inch ridge forms monday over the 
lower great lakes as the low retreats to alberta. monday night, a 
29.8 inch trough will be over northern ontario, with the high slowly 
moving southeast tuesday. by tuesday night, a 30.2 inch high over 
the western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz267-232000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt sat may 23 2026

.early this morning...east winds 15 to 25 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.today...east winds 20 to 30 knots veering southeast in the
afternoon. a slight chance of showers. waves building to 4 to
7 feet occasionally to 9 feet. 
.tonight...southeast winds 20 to 30 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots veering south in the
afternoon. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...northwest winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202605232000;;499057

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat may 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

lake superior is currently between a 30.6 inch high over quebec and 
a pair of 29.9 inch lows, one south of the michigan lower peninsula 
and one over the east half of the dakotas. through today, the lows 
weaken to remnant 30.0 inch troughs over the upper great lakes while 
the high shifts over nova scotia. sunday, lake superior will be 
between the high, now off the canada coast, and broad 29.6 inch low 
pressure over saskatchewan. a 30.1 inch ridge forms monday over the 
lower great lakes as the low retreats to alberta. monday night, a 
29.8 inch trough will be over northern ontario, with the high slowly 
moving southeast tuesday. by tuesday night, a 30.2 inch high over 
the western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz162-232000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sat may 23 2026 /300 am cdt sat may 23 2026/

.early this morning...east winds 10 to 20 knots. a chance of rain
showers. waves 2 to 4 feet. 
.today...east winds 10 to 20 knots backing northeast in the
afternoon. rain showers likely through early afternoon, then a
chance of rain showers by mid afternoon. waves subsiding to 1 to
3 feet. 
.tonight...northeast winds 5 to 15 knots backing north after
midnight, then becoming west less than 10 knots late. a slight
chance of rain showers through midnight. waves subsiding to calm
to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south late. a
slight chance of showers and thunderstorms by mid afternoon.
waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.monday...southwest winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...north winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 
.wednesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202605232000;;499059

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat may 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

lake superior is currently between a 30.6 inch high over quebec and 
a pair of 29.9 inch lows, one south of the michigan lower peninsula 
and one over the east half of the dakotas. through today, the lows 
weaken to remnant 30.0 inch troughs over the upper great lakes while 
the high shifts over nova scotia. sunday, lake superior will be 
between the high, now off the canada coast, and broad 29.6 inch low 
pressure over saskatchewan. a 30.1 inch ridge forms monday over the 
lower great lakes as the low retreats to alberta. monday night, a 
29.8 inch trough will be over northern ontario, with the high slowly 
moving southeast tuesday. by tuesday night, a 30.2 inch high over 
the western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz264-232000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt sat may 23 2026

.early this morning...east winds 15 to 25 knots. waves 2 to
4 feet. 
.today...southeast winds 15 to 25 knots. a chance of rain
showers. a slight chance of thunderstorms by mid afternoon. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tonight...southeast winds 15 to 25 knots diminishing to 5 to
15 knots late. rain showers likely through midnight, then a
chance of rain showers after midnight. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet. 
.sunday...southwest winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.sunday night...south winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.monday...southwest winds less than 10 knots becoming southeast
5 to 15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.tuesday...west winds less than 10 knots becoming east 5 to
15 knots. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves calm to 2 feet.

$$

fzus63 kmqt 230801
glfls 
expires:202605232000;;499058

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat may 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

lake superior is currently between a 30.6 inch high over quebec and 
a pair of 29.9 inch lows, one south of the michigan lower peninsula 
and one over the east half of the dakotas. through today, the lows 
weaken to remnant 30.0 inch troughs over the upper great lakes while 
the high shifts over nova scotia. sunday, lake superior will be 
between the high, now off the canada coast, and broad 29.6 inch low 
pressure over saskatchewan. a 30.1 inch ridge forms monday over the 
lower great lakes as the low retreats to alberta. monday night, a 
29.8 inch trough will be over northern ontario, with the high slowly 
moving southeast tuesday. by tuesday night, a 30.2 inch high over 
the western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz263-232000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
400 am edt sat may 23 2026

.early this morning...east winds 10 to 20 knots. a slight chance
of rain showers. waves 2 to 4 feet. 
.today...east winds 10 to 20 knots. a chance of rain showers.
waves building to 3 to 5 feet occasionally to 7 feet. 
.tonight...southeast winds 10 to 20 knots becoming west 5 to
15 knots late. a chance of rain showers. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.sunday...west winds 5 to 15 knots backing southwest in the
afternoon, then becoming south 10 to 20 knots late. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.sunday night...southwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.monday...southwest winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.tuesday...south winds less than 10 knots becoming northeast 5 to
15 knots. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202605232000;;499060

open lake forecast for lake superior
national weather service marquette mi
400 am edt sat may 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis... 

lake superior is currently between a 30.6 inch high over quebec and 
a pair of 29.9 inch lows, one south of the michigan lower peninsula 
and one over the east half of the dakotas. through today, the lows 
weaken to remnant 30.0 inch troughs over the upper great lakes while 
the high shifts over nova scotia. sunday, lake superior will be 
between the high, now off the canada coast, and broad 29.6 inch low 
pressure over saskatchewan. a 30.1 inch ridge forms monday over the 
lower great lakes as the low retreats to alberta. monday night, a 
29.8 inch trough will be over northern ontario, with the high slowly 
moving southeast tuesday. by tuesday night, a 30.2 inch high over 
the western shores of hudson bay will extend weak ridging over lake 
superior with 29.4 inch troughing forming in the lee of the northern 
us rockies. pressure rises over the lake as the high shifts 
southeast over northern ontario while low pressure over the west 
weakens on wednesday.



lsz265-232000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt sat may 23 2026

.early this morning...east winds 15 to 25 knots. waves 2 to
4 feet. 
.today...east winds 15 to 25 knots becoming southeast 20 to
30 knots in the afternoon. a chance of rain showers. a slight
chance of thunderstorms by mid afternoon. waves building to 3 to
6 feet occasionally to 8 feet. 
.tonight...southeast winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of rain showers. waves
subsiding to 1 to 3 feet. 
.sunday...south winds 10 to 20 knots veering southwest in the
afternoon, then backing southeast late. waves subsiding to calm
to 2 feet. 
.sunday night...south winds 10 to 20 knots veering southwest
after midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots backing east. waves calm to
2 feet. 
.wednesday...northeast winds 5 to 15 knots veering east. waves
calm to 2 feet. 

$$