fzus61 kbuf 121401
glflo 
expires:202609122100;;327560

open lake forecast for lake ontario
national weather service buffalo ny
1001 am edt sat sep 12 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 high pressure ridge averaging 30.0 inches will move 
off the east coast today. a warm front will sweep northeastward 
across the lake this evening before a cold front sweeps eastward 
across the lake on sunday. behind the cold front, a ridge averaging 
30.2 inches will slide eastward across the lower great lakes through 
monday. the ridge should exit toward new england on tuesday and 
allow a warm front to sweep northeastward across the lake. on 
wednesday, a cold front should sweep eastward across the lake and be 
followed by a ridge averaging 30.1 inches and building from the 
upper midwest.


loz062-122100-
lake ontario open waters from the niagara river to hamlin beach-
1001 am edt sat sep 12 2026

.this afternoon...south winds 5 to 10 knots becoming east. waves
1 foot or less. 
.tonight...southeast winds 5 to 15 knots becoming southwest. a
chance of showers through the early overnight. waves 1 to 3 feet.
.sunday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.sunday night...northwest winds 15 to 20 knots. a chance of
showers. waves 1 to 3 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 
.monday...north winds 5 to 15 knots becoming southeast 10 knots
or less. waves 2 to 4 feet subsiding to 2 feet or less. 
.tuesday...south winds 5 to 15 knots becoming southwest. a chance
of showers. waves 2 feet or less. 
.wednesday...west winds 10 knots or less becoming northeast. a
chance of showers during the day, then showers likely wednesday
night. waves 1 foot or less. 

$$

fzus61 kbuf 121401
glflo 
expires:202609122100;;327561

open lake forecast for lake ontario
national weather service buffalo ny
1001 am edt sat sep 12 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 high pressure ridge averaging 30.0 inches will move 
off the east coast today. a warm front will sweep northeastward 
across the lake this evening before a cold front sweeps eastward 
across the lake on sunday. behind the cold front, a ridge averaging 
30.2 inches will slide eastward across the lower great lakes through 
monday. the ridge should exit toward new england on tuesday and 
allow a warm front to sweep northeastward across the lake. on 
wednesday, a cold front should sweep eastward across the lake and be 
followed by a ridge averaging 30.1 inches and building from the 
upper midwest.


loz063>065-122100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1001 am edt sat sep 12 2026

.this afternoon...south winds 15 to 20 knots becoming southeast
10 to 15 knots. waves 1 to 3 feet. 
.tonight...south winds 15 to 20 knots. showers likely with a
chance of thunderstorms through the early overnight, then a
chance of showers late. waves 1 to 3 feet building to 2 to
4 feet. 
.sunday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 1 to 3 feet. 
.sunday night...west winds 10 to 15 knots becoming northwest
15 to 20 knots. a chance of showers. waves 2 to 4 feet building
to 3 to 5 feet. 
.monday...north winds 15 to 20 knots becoming southeast 5 to
15 knots. waves 3 to 5 feet subsiding to 1 foot or less. 
.tuesday...south winds 15 to 25 knots. a chance of showers
tuesday night. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...southwest winds 5 to 15 knots becoming southeast
10 knots or less. a chance of showers. waves 1 to 3 feet
subsiding to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121418
glfle 
expires:202609122015;;328469

open lake forecast for lake erie
national weather service cleveland oh
1018 am edt sat sep 12 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...
a warm front will lift across the region today before a cold 
front follows across the area on sunday. high pressure 30.30 will
move over the lake on monday and exit east on tuesday. a cold
front will approach the lake on tuesday night and settle south of
the lake for wednesday.


lez061-168-169-122015-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
1018 am edt sat sep 12 2026

.rest of today...south winds 5 to 10 knots becoming southwest. a
chance of showers early this afternoon. a chance of showers and
thunderstorms late. waves 2 feet or less. 
.tonight...southwest winds 10 to 15 knots. a chance of showers
and thunderstorms in the evening, then a chance of showers after
midnight. waves 1 to 3 feet. 
.sunday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday night...northwest winds 15 to 20 knots becoming north.
waves 2 to 3 feet building to 3 to 5 feet. 
.monday...north winds 15 to 20 knots becoming southeast 5 to
15 knots. waves 3 to 5 feet subsiding to 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. a chance of showers tuesday night. waves 1 to 3 feet. 
.wednesday...south winds 10 knots or less becoming southwest. a
chance of showers during the day, then showers likely with a
chance of thunderstorms wednesday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121418
glfle 
expires:202609122015;;328467

open lake forecast for lake erie
national weather service cleveland oh
1018 am edt sat sep 12 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...
a warm front will lift across the region today before a cold 
front follows across the area on sunday. high pressure 30.30 will
move over the lake on monday and exit east on tuesday. a cold
front will approach the lake on tuesday night and settle south of
the lake for wednesday.


lez162-163-122015-
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-
1018 am edt sat sep 12 2026

.rest of today...south winds around 10 knots. a chance of showers
late this morning, then a slight chance of showers early this
afternoon. a slight chance of showers and thunderstorms late.
waves 1 foot or less. 
.tonight...south winds 10 to 15 knots becoming west. a slight
chance of showers and thunderstorms early. waves 1 to 2 feet. 
.sunday...west winds 5 to 15 knots becoming northwest. waves
2 feet or less. 
.sunday night...northwest winds 15 to 20 knots becoming north.
waves 1 to 3 feet building to 2 to 4 feet. 
.monday...north winds 15 to 20 knots becoming southeast. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 5 to
15 knots. showers likely tuesday night. waves 1 to 3 feet
subsiding to 1 foot or less. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms during the day, then showers
likely with a chance of thunderstorms wednesday night. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 121418
glfle 
expires:202609122015;;328468

open lake forecast for lake erie
national weather service cleveland oh
1018 am edt sat sep 12 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...
a warm front will lift across the region today before a cold 
front follows across the area on sunday. high pressure 30.30 will
move over the lake on monday and exit east on tuesday. a cold
front will approach the lake on tuesday night and settle south of
the lake for wednesday.


lez164>167-122015-
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-
1018 am edt sat sep 12 2026

.rest of today...south winds 5 to 10 knots becoming southwest. a
chance of showers late this morning, then a chance of showers
with a slight chance of thunderstorms this afternoon. waves 1 to
2 feet. 
.tonight...southwest winds 10 to 15 knots. a slight chance of
showers and thunderstorms early. waves 1 to 3 feet building to
2 to 4 feet. 
.sunday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday night...northwest winds 15 to 25 knots becoming north.
waves 1 to 3 feet building to 3 to 6 feet. 
.monday...north winds 15 to 20 knots becoming southeast. waves
3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. showers likely tuesday night. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.wednesday...southwest winds 5 to 15 knots. a chance of showers
during the day, then showers likely with a chance of
thunderstorms wednesday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 121356
glfsc 
expires:202609122200;;327382

lake st clair forecast
national weather service detroit/pontiac mi
956 am edt sat sep 12 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...high pressure, 30.00 inches, will slowly move eastward
towards the east coast today. low pressure, 29.30 inches, lifting
over northern ontario then drags a cold front across the central
great lakes late saturday into sunday.


lcz460-122200-
lake st clair-
956 am edt sat sep 12 2026

.rest of today...south winds 10 to 15 knots. mostly cloudy. waves 2
feet or less.
.tonight...southwest winds 10 to 15 knots becoming west 5 to 10
knots after midnight. partly cloudy. waves 2 feet or less.
.sunday...north winds 5 to 10 knots becoming northwest 10 to 15
knots early in the afternoon. partly sunny. waves 2 feet or less.
.sunday night...northwest winds 20 to 25 knots becoming north 15 to
20 knots after midnight. mostly cloudy becoming partly cloudy by
midnight becoming clear. waves 2 to 4 feet subsiding to 1 to 3 feet
after midnight.
.monday...north winds 10 to 15 knots becoming northeast 5 to 10
knots in the afternoon...then becoming east 10 to 15 knots in the
evening. sunny becoming mostly sunny in the afternoon becoming
partly cloudy. waves 2 feet or less.
.tuesday...southwest winds 15 to 20 knots. partly cloudy. showers
likely. waves 1 to 3 feet.
.wednesday...northeast winds 5 to 10 knots. mostly cloudy with
showers likely. waves 2 feet or less.

$$

fzus63 kdtx 121355
glflh 
expires:202609122200;;327369

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 am edt sat sep 12 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...high pressure, 30.00 inches, will slowly move eastward
towards the east coast today. low pressure, 29.30 inches, lifting
over northern ontario then drags a cold front across the central
great lakes late saturday into sunday.


lhz361>363-122200-
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-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
955 am edt sat sep 12 2026

.rest of today...south winds 10 to 15 knots. a chance of showers
in the afternoon. waves 2 to 4 feet. 
.tonight...south winds 10 to 15 knots veering to the north after
midnight. a chance of showers in the evening. waves 2 to 4 feet. 
.sunday...northwest winds 10 to 15 knots becoming west 15 to
20 knots with gusts to around 30 knots early in the afternoon. a
chance of showers in the afternoon. waves 1 to 3 feet building to
4 to 6 feet early in the afternoon. waves occasionally around
8 feet. 
.sunday night...northwest winds 20 to 25 knots with gusts to
around 30 knots decreasing to 10 to 15 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.monday...northwest winds 5 to 10 knots in the morning becoming
light and variable...then becoming southeast 5 to 10 knots late
in the afternoon becoming south 20 to 25 knots with gusts to
35 knot gales. a chance of showers late in the afternoon. rain
showers late in the evening. waves 3 to 5 feet subsiding to 1 to
3 feet late in the morning...then building to 6 to 9 feet late in
the evening. waves occasionally around 12 feet. 
.tuesday...south winds to 30 knots with gusts to 40 knot gales
decreasing to 20 to 25 knots with gusts to 40 knot gales in the
late morning and early afternoon...then becoming west 10 to
15 knots with gusts to around 30 knots early in the evening
decreasing to 5 to 10 knots by midnight. showers early in the
morning. rain showers likely in the late morning and early
afternoon. waves 8 to 12 feet subsiding to 3 to 5 feet by
midnight. waves occasionally around 15 feet. 
.wednesday...northwest winds 5 to 10 knots early in the morning
becoming light and variable...then becoming northeast 5 to
10 knots by midnight. a chance of showers . waves 2 feet or less.


$$

fzus63 kdtx 121355
glflh 
expires:202609122200;;327370

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 am edt sat sep 12 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...high pressure, 30.00 inches, will slowly move eastward
towards the east coast today. low pressure, 29.30 inches, lifting
over northern ontario then drags a cold front across the central
great lakes late saturday into sunday.


lhz462>464-122200-
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-
955 am edt sat sep 12 2026

.rest of today...south winds 10 to 15 knots. a slight chance of
showers. waves 1 to 3 feet.
.tonight...south winds 5 to 10 knots becoming southwest 10 to
15 knots in the late evening and overnight. waves 1 to 3 feet. 
.sunday...north winds 5 to 10 knots becoming west 10 to 15 knots
early in the afternoon. a chance of showers in the afternoon.
waves 1 to 3 feet. 
.sunday night...northwest winds 15 to 20 knots. a chance of
showers in the evening. waves 4 to 6 feet. 
.monday...northwest winds 10 to 15 knots becoming light and
variable...then becoming south 15 to 20 knots with gusts to
around 30 knots late in the evening. a chance of showers late in
the evening. waves 3 to 5 feet subsiding to 1 to 3 feet late in
the afternoon...then building to 3 to 5 feet late in the evening.
waves occasionally around 8 feet. 
.tuesday...south winds 20 to 25 knots with gusts to 35 knot gales
decreasing to 10 to 15 knots early in the evening...then becoming
southwest 5 to 10 knots by midnight. a chance of showers early in
the morning...then showers likely in the late morning and early
afternoon. a chance of showers . waves 5 to 7 feet subsiding to
1 to 3 feet by midnight. waves occasionally around 10 feet. 
.wednesday...northwest winds 5 to 10 knots veering to the
northeast. a chance of showers. rain showers likely by midnight.
waves 2 feet or less. 


$$

fzus63 kmkx 121248
glflm 
expires:202609122115;;325257

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
748 am cdt sat sep 12 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...

southerly winds will continue to increase this morning as a cold 
front approaches the region, with winds shifting to westerly as 
the cold front moves across the lake this afternoon. expecting 
wind gusts to remain primarily in the 25 to 30 knot range over the
open waters, though a few gusts approaching gale force may occur 
in far northern portions of the lake. isolated showers and 
thunderstorms are possible ahead of the approaching cold front.

high pressure around 30.2 inches will build in from the 
northern great plains sunday night into monday. expect decreasing
winds saturday night through sunday, and winds gradually shifting
to the southeast and increasing sunday night into monday. winds 
will increase and veer south-southwest monday night into tuesday
as low pressure around 29.4 inches develops over manitoba. gales 
appear likely during this time frame. periods of showers and 
thunderstorms will accompany the developing low from as early as 
monday evening into tuesday. winds will trend northerly and weaken
behind a cold front tuesday night into wednesday.


lmz261-362-364-366-563-565-567-868-122115-
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-
748 am cdt sat sep 12 2026

sheboygan wi to pentwater mi north...

.rest of today...south winds to 30 kt becoming west. slight
chance of showers this morning, then chance of showers this
afternoon. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.tonight...northwest winds 10 to 20 kt becoming north 15 to
25 kt, then becoming northwest 10 to 20 kt late. waves 3 to 5 ft.
.sunday...northwest winds 10 to 20 kt increasing to 30 kt. waves
3 to 5 ft. 
.sunday night...northwest winds to 30 kt becoming north 10 to
15 kt overnight. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.monday...northeast winds 10 to 15 kt veering to south to 30 kt
in the afternoon. waves 1 to 2 ft building to 4 to 6 ft
occasionally to 8 ft. 
.monday night...south gales to 35 kt. showers. waves 8 to 11 ft 
occasionally to 14 ft building to 12 to 16 ft occasionally to 21 
ft. 
.tuesday...southwest gales to 35 kt becoming west gales to 35 kt.
chance of showers. waves 12 to 16 ft occasionally to 21 ft 
subsiding to 7 to 10 ft occasionally to 13 ft. 
.wednesday...northeast winds 10 to 15 kt. chance of showers.
waves 1 to 3 ft.  

$$

fzus63 kmkx 121248
glflm 
expires:202609122115;;325258

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
748 am cdt sat sep 12 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...

southerly winds will continue to increase this morning as a cold 
front approaches the region, with winds shifting to westerly as 
the cold front moves across the lake this afternoon. expecting 
wind gusts to remain primarily in the 25 to 30 knot range over the
open waters, though a few gusts approaching gale force may occur 
in far northern portions of the lake. isolated showers and 
thunderstorms are possible ahead of the approaching cold front.

high pressure around 30.2 inches will build in from the 
northern great plains sunday night into monday. expect decreasing
winds saturday night through sunday, and winds gradually shifting
to the southeast and increasing sunday night into monday. winds 
will increase and veer south-southwest monday night into tuesday
as low pressure around 29.4 inches develops over manitoba. gales 
appear likely during this time frame. periods of showers and 
thunderstorms will accompany the developing low from as early as 
monday evening into tuesday. winds will trend northerly and weaken
behind a cold front tuesday night into wednesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-122115-
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-
748 am cdt sat sep 12 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.tonight...northwest winds 10 to 20 kt becoming north. waves 4 to
6 ft occasionally to 8 ft. 
.sunday...north winds 10 to 20 kt becoming northwest 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.sunday night...north winds 15 to 25 kt becoming northeast 10 to
15 kt overnight. waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft. 
.monday...east winds 10 to 20 kt becoming southeast to 30 kt in
the afternoon. waves 2 to 4 ft building to 4 to 6 ft occasionally
to 8 ft. 
.monday night...southeast gales to 35 kt becoming south. chance 
of showers and thunderstorms. waves 8 to 11 ft occasionally to 14 
ft building to 12 to 16 ft occasionally to 21 ft. 
.tuesday...southwest gales to 35 kt becoming west to 30 kt. 
showers likely. waves 12 to 16 ft occasionally to 21 ft subsiding 
to 7 to 10 ft occasionally to 13 ft. 
.wednesday...northeast winds 10 to 15 kt. showers likely with a
chance of thunderstorms. waves 1 to 3 ft.  

$$

fzus63 kmqt 121401
glfls 
expires:202609122000;;327553

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat sep 12 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...

a 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a low averaging 29.5 inches crosses northern 
ontario on tuesday, with a strong 30.4 inch high building across 
lake superior on wednesday.




lsz162-122000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt sat sep 12 2026 /900 am cdt sat sep 12 2026/

.rest of today...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves 1 to 3 feet building to 2 to
4 feet. 
.tonight...west winds 15 to 25 knots becoming northwest 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.sunday...west winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then diminishing to 10 to 20 knots late. waves
subsiding to calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 20 to
30 knots by mid afternoon. showers likely and a slight chance of
thunderstorms by mid afternoon. waves calm to 2 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. showers through midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west gales to 35 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots backing northwest.
waves calm to 2 feet. 

$$

fzus63 kmqt 121401
glfls 
expires:202609122000;;327554

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat sep 12 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...

a 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a low averaging 29.5 inches crosses northern 
ontario on tuesday, with a strong 30.4 inch high building across 
lake superior on wednesday.




lsz263-122000-
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-
1000 am edt sat sep 12 2026

.rest of today...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves 3 to 6 feet occasionally to
8 feet. 
.tonight...west winds 15 to 25 knots veering northwest after
midnight, then diminishing to 10 to 20 knots late. waves
subsiding to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots backing west in the
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 15 to 25 knots becoming southeast 20 to
30 knots by mid afternoon. a chance of showers by mid afternoon.
waves calm to 2 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. showers through midnight, then a chance of showers
after midnight. waves building to 4 to 7 feet occasionally to
9 feet. 
.tuesday...west gales to 40 knots becoming northwest 10 to
20 knots. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots backing northwest.
waves calm to 2 feet. 

$$

fzus63 kmqt 121401
glfls 
expires:202609122000;;327555

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat sep 12 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...

a 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a low averaging 29.5 inches crosses northern 
ontario on tuesday, with a strong 30.4 inch high building across 
lake superior on wednesday.




lsz264-122000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am edt sat sep 12 2026

.rest of today...west winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves 3 to 6 feet occasionally to
8 feet. 
.tonight...west winds 15 to 25 knots veering northwest after
midnight, then diminishing to 10 to 20 knots late. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.sunday...northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. waves subsiding to 2 to 4 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 20 to
30 knots by mid afternoon. waves building to 2 to 4 feet. 
.monday night...southeast gales to 35 knots veering south after
midnight. showers through midnight, then a chance of showers
after midnight. waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. 
.tuesday...west gales to 40 knots becoming northwest 15 to
25 knots. waves subsiding to 4 to 7 feet occasionally to 9 feet,
then building to 7 to 10 feet occasionally to 13 feet. 
.wednesday...north winds 5 to 15 knots backing northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 121401
glfls 
expires:202609122000;;327556

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat sep 12 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...

a 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a low averaging 29.5 inches crosses northern 
ontario on tuesday, with a strong 30.4 inch high building across 
lake superior on wednesday.




lsz265-122000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am edt sat sep 12 2026

.rest of today...west winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon. waves 2 to 4 feet building to 3 to 5 feet occasionally
to 7 feet. 
.tonight...west winds 20 to 30 knots veering northwest after
midnight. waves 3 to 5 feet occasionally to 7 feet. 
.sunday...northwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon. a slight chance of showers through early afternoon.
waves subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...northwest winds 20 to 30 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast gales to
35 knots by mid afternoon. a slight chance of showers by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.monday night...south gales to 40 knots. showers. waves building
to 6 to 9 feet occasionally to 11 feet, then subsiding to 4 to
7 feet occasionally to 9 feet. 
.tuesday...west gales to 40 knots becoming northwest 15 to
25 knots. waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 5 to 8 feet occasionally to 10 feet. 
.wednesday...north winds 10 to 20 knots backing west. waves calm
to 2 feet. 

$$

fzus63 kmqt 121401
glfls 
expires:202609122000;;327557

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat sep 12 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...

a 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a low averaging 29.5 inches crosses northern 
ontario on tuesday, with a strong 30.4 inch high building across 
lake superior on wednesday.




lsz266-122000-
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-
1000 am edt sat sep 12 2026

.rest of today...southwest winds 20 to 30 knots veering west in
the afternoon. a slight chance of showers by late morning. waves
3 to 6 feet occasionally to 8 feet. 
.tonight...west winds 20 to 30 knots veering northwest after
midnight. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 20 to 30 knots. a slight chance of
showers. waves subsiding to 3 to 5 feet occasionally to 7 feet,
then building to 4 to 7 feet occasionally to 9 feet. 
.sunday night...northwest winds 20 to 30 knots diminishing to
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...south winds 5 to 15 knots becoming southeast gales to
35 knots by mid afternoon. waves subsiding to calm to 2 feet,
then building to 2 to 4 feet. 
.monday night...south gales to 40 knots. showers. waves building
to 7 to 10 feet occasionally to 13 feet. 
.tuesday...west gales to 40 knots becoming northwest 20 to
30 knots. waves subsiding to 5 to 8 feet occasionally to 10 feet,
then building to 6 to 9 feet occasionally to 11 feet. 
.wednesday...north winds 5 to 15 knots backing northwest. a
chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 121401
glfls 
expires:202609122000;;327558

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sat sep 12 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...

a 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a low averaging 29.5 inches crosses northern 
ontario on tuesday, with a strong 30.4 inch high building across 
lake superior on wednesday.




lsz267-122000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am edt sat sep 12 2026

.rest of today...southwest winds 20 to 30 knots veering west in
the afternoon. a chance of showers by late morning. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...west winds 20 to 30 knots veering northwest after
midnight, then diminishing to 15 to 25 knots late. waves building
to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a slight chance of showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.sunday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.monday night...south gales to 40 knots. showers. waves building
to 7 to 10 feet occasionally to 13 feet. 
.tuesday...west gales to 40 knots becoming northwest 15 to
25 knots. a chance of showers. waves subsiding to 1 to 3 feet. 
.wednesday...north winds 5 to 15 knots becoming northwest 10 to
20 knots. a chance of showers. waves subsiding to calm to 2 feet.

$$