fzus61 kbuf 202002
glflo 
expires:202609210300;;780822

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun sep 20 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...
an 29.9 inch inverted trough draped from the ohio valley to new york 
state will drift southeastward and away from the lake this afternoon 
and tonight as a 30.4 inch high builds southeastward across ontario 
province. this high will then strengthen to 30.6 inches as it slowly 
drifts across quebec through thursday.


loz063>065-210300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sun sep 20 2026

.tonight...northeast winds 10 to 15 knots increasing to 15 to
25 knots. waves 1 to 3 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.monday...northeast winds 15 to 25 knots. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.monday night...northeast winds 15 to 25 knots. waves 2 to 4 feet
building to 4 to 7 feet. waves occasionally around 9 feet. 
.tuesday...northeast winds 15 to 25 knots. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.tuesday night...northeast winds 15 to 20 knots becoming east.
waves 3 to 5 feet. 
.wednesday...east winds 15 to 20 knots. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.thursday...east winds 10 to 15 knots becoming northeast. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 10 to 15 knots. waves 1 to 3 feet. 

$$

fzus61 kbuf 202002
glflo 
expires:202609210300;;780821

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun sep 20 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...
an 29.9 inch inverted trough draped from the ohio valley to new york 
state will drift southeastward and away from the lake this afternoon 
and tonight as a 30.4 inch high builds southeastward across ontario 
province. this high will then strengthen to 30.6 inches as it slowly 
drifts across quebec through thursday.


loz062-210300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt sun sep 20 2026

.tonight...north winds 5 to 10 knots becoming northeast and
increasing to 15 to 25 knots after midnight. waves 1 to 3 feet
building to 5 to 7 feet. waves occasionally around 9 feet. 
.monday...northeast winds 15 to 25 knots. waves 3 to 6 feet. 
.monday night...northeast winds 15 to 25 knots. waves 3 to 6 feet
building to 5 to 7 feet. waves occasionally around 9 feet. 
.tuesday...northeast winds 20 to 25 knots becoming east. waves
5 to 8 feet. waves occasionally around 10 feet. 
.tuesday night...east winds 15 to 25 knots. waves 5 to 8 feet.
waves occasionally around 10 feet. 
.wednesday...east winds 15 to 25 knots. waves 3 to 6 feet. 
.thursday...east winds 10 to 15 knots becoming northeast. waves
2 to 4 feet. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 

$$

fzus61 kcle 201953
glfle 
expires:202609210230;;780482

open lake forecast for lake erie
national weather service cleveland oh
353 pm edt sun sep 20 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 cold front will slowly push south of lake erie tonight. the lake
will be between high pressure 30.40 inches to the north and low
pressure 29.90 inches to the south for at least the first half of
the week. high pressure 30.20 inches will build over the great 
lakes by friday.


lez164>167-210230-
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-
353 pm edt sun sep 20 2026

.tonight...northeast winds 15 to 25 knots. a chance of showers
early, then a slight chance of showers late this evening. waves
2 to 4 feet building to 4 to 7 feet. waves occasionally around
9 feet. 
.monday...northeast winds 20 to 25 knots. a slight chance of
showers through early afternoon, then a chance of showers late.
waves 5 to 9 feet. waves occasionally around 11 feet. 
.monday night...northeast winds to 30 knots. waves 6 to 10 feet.
waves occasionally around 13 feet. 
.tuesday...northeast winds to 30 knots. waves 6 to 10 feet. waves
occasionally around 13 feet. 
.tuesday night...east winds to 30 knots. a chance of showers.
waves 5 to 9 feet. waves occasionally around 11 feet. 
.wednesday...east winds 15 to 25 knots. a chance of showers.
waves 4 to 7 feet subsiding to 3 to 6 feet. waves occasionally
around 9 feet. 
.thursday...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.friday...east winds 10 to 15 knots becoming northeast. waves
1 to 3 feet. 

$$

fzus61 kcle 201953
glfle 
expires:202609210230;;780483

open lake forecast for lake erie
national weather service cleveland oh
353 pm edt sun sep 20 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 cold front will slowly push south of lake erie tonight. the lake
will be between high pressure 30.40 inches to the north and low
pressure 29.90 inches to the south for at least the first half of
the week. high pressure 30.20 inches will build over the great 
lakes by friday.


lez061-168-169-210230-
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-
353 pm edt sun sep 20 2026

.tonight...northeast winds 10 to 15 knots increasing to 15 to
25 knots. waves 1 to 3 feet building to 3 to 6 feet. 
.monday...northeast winds 15 to 25 knots. waves 4 to 7 feet.
waves occasionally around 9 feet. 
.monday night...northeast winds to 30 knots diminishing to 15 to
25 knots. waves 5 to 8 feet. waves occasionally around 10 feet. 
.tuesday...northeast winds 15 to 25 knots. waves 5 to 8 feet.
waves occasionally around 10 feet. 
.tuesday night...east winds 15 to 25 knots. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.wednesday...east winds 15 to 20 knots. a chance of showers.
waves 3 to 6 feet. 
.thursday...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 

$$

fzus61 kcle 201953
glfle 
expires:202609210230;;780481

open lake forecast for lake erie
national weather service cleveland oh
353 pm edt sun sep 20 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 cold front will slowly push south of lake erie tonight. the lake
will be between high pressure 30.40 inches to the north and low
pressure 29.90 inches to the south for at least the first half of
the week. high pressure 30.20 inches will build over the great 
lakes by friday.


lez162-163-210230-
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-
353 pm edt sun sep 20 2026

.tonight...northeast winds 15 to 25 knots. a chance of showers
this evening. a slight chance of showers late. waves 2 to 4 feet
building to 3 to 6 feet. 
.monday...northeast winds 20 to 25 knots. a chance of showers
through early afternoon, then a slight chance of showers late.
waves 5 to 8 feet. waves occasionally around 10 feet. 
.monday night...northeast winds 20 to 25 knots. waves 5 to
8 feet. waves occasionally around 10 feet. 
.tuesday...northeast winds to 30 knots. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.tuesday night...northeast winds to 30 knots becoming east. a
chance of showers. waves 5 to 8 feet. waves occasionally around
10 feet. 
.wednesday...east winds 15 to 25 knots. a chance of showers.
waves 3 to 6 feet. 
.thursday...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 10 to 15 knots. waves 1 to 3 feet. 

$$

fzus63 kdtx 201943
glfsc 
expires:202609210345;;780192

lake st clair forecast
national weather service detroit/pontiac mi
343 pm edt sun sep 20 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, 30.40 inches, over northern ontario
will build southeast early this week. this will lead to prolong
moderate northeast winds over the central great lakes.


lcz460-210345-
lake st clair-
343 pm edt sun sep 20 2026

...small craft advisory in effect from 8 pm edt this evening
through wednesday evening...

.tonight...northeast winds 15 to 20 knots increasing to 20 to 25
knots in the late evening and overnight. mostly cloudy. waves 1 to 3
feet building to 2 to 4 feet after midnight.
.monday...northeast winds 20 to 25 knots diminishing to 15 to 20
knots in the late morning and afternoon. mostly cloudy. waves 2 to 4
feet subsiding to 1 to 3 feet in the late morning and afternoon.
.monday night...northeast winds 20 to 25 knots increasing to 30
knots by midnight...then diminishing to 20 to 25 knots after
midnight. partly cloudy. waves 2 to 4 feet.
.tuesday...northeast winds 20 to 25 knots diminishing to 15 to 20
knots early in the afternoon. partly sunny. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon.
.tuesday night...northeast winds to 30 knots with gusts to 35 knot
gales. mostly cloudy. waves 3 to 5 feet. waves occasionally around 7
feet.  a gale warning may be needed.
.wednesday...northeast winds 20 to 25 knots becoming east 15 to 20
knots in the afternoon...then increasing to 20 to 25 knots in the
evening. partly sunny in the morning...then partly cloudy with a
chance of light showers in the afternoon and evening. waves 2 to 4
feet.
.thursday...east winds 20 to 25 knots. partly cloudy. waves 1 to 3
feet.
.friday...northeast winds 10 to 15 knots. mostly clear. waves 2 feet
or less.

$$

fzus63 kdtx 201943
glflh 
expires:202609210345;;780188

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 pm edt sun sep 20 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, 30.40 inches, over northern ontario
will build southeast early this week. this will lead to prolong
moderate northeast winds over the central great lakes.


lhz361-362-210345-
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-
343 pm edt sun sep 20 2026

.tonight...north winds 10 to 15 knots becoming northeast 15 to
20 knots in the late evening and overnight. waves 1 to 3 feet
building to 4 to 6 feet in the late evening and overnight. waves
occasionally around 8 feet. 
.monday...northeast winds 15 to 20 knots decreasing to 10 to
15 knots in the afternoon. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.monday night...northeast winds 10 to 15 knots increasing to
15 to 20 knots in the late evening and overnight. waves 3 to
5 feet. 
.tuesday...northeast winds 15 to 20 knots becoming east 10 to
15 knots early in the afternoon. waves 3 to 5 feet. 
.tuesday night...east winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. waves 3 to 5 feet. 
.wednesday...east winds 15 to 20 knots decreasing to 10 to
15 knots late in the afternoon. waves 2 to 4 feet. 
.thursday...east winds 10 to 15 knots decreasing to 5 to 10 knots
. waves 1 to 3 feet. 
.friday...light and variable winds. waves 2 feet or less. 


$$

fzus63 kdtx 201943
glflh 
expires:202609210345;;780189

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 pm edt sun sep 20 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, 30.40 inches, over northern ontario
will build southeast early this week. this will lead to prolong
moderate northeast winds over the central great lakes.


lhz363-462>464-210345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
343 pm edt sun sep 20 2026

.tonight...northeast winds 15 to 20 knots increasing to 20 to
25 knots after midnight. waves 4 to 6 feet. 
.monday...northeast winds 15 to 20 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.monday night...northeast winds 15 to 20 knots. waves 4 to
6 feet. waves occasionally around 8 feet. 
.tuesday...northeast winds 15 to 20 knots. gusts to 30 knots
early in the afternoon. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.tuesday night...northeast winds 15 to 20 knots. gusts to
30 knots early in the evening. waves 4 to 6 feet. 
.wednesday...east winds 15 to 20 knots. waves 3 to 5 feet. waves
occasionally around 8 feet. 
.thursday...east winds 10 to 15 knots decreasing to 5 to 10 knots
. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...east winds 5 to 10 knots backing to the northeast.
waves 2 feet or less. 


$$

fzus63 kmkx 201948
glflm 
expires:202609210330;;780310

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 pm cdt sun sep 20 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...

low pressure around 29.8 inches will move from southern illinois 
into the ohio valley today into monday. meanwhile, high pressure 
around 30.4 inches over western ontario today will move eastward 
through monday, reaching quebec by monday night. the high will 
then largely remain in place into mid-week, while strengthening to
around 30.7 inches. gusty northeast winds are expected today into
tonight, becoming east and remaining gusty monday into wednesday.
a few gale force gusts may occur today into monday, mainly over 
southern portions of the lake. building waves are expected over 
western portions of the lake today into the middle of the week. 
lighter easterly winds should then linger for thursday into 
friday, as the high pressure system slowly moves farther east.


lmz080-669-671-673-675-777-779-870-872-874-876-878-210330-
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-
248 pm cdt sun sep 20 2026

sheboygan wi to pentwater mi south...

.tonight...northeast winds to 30 kt becoming east. chance of
showers this evening. waves 8 to 12 ft occasionally to 16 ft
subsiding to 7 to 10 ft occasionally to 13 ft. 
.monday...east winds to 30 kt becoming northeast. slight chance
of showers in the morning. waves 7 to 10 ft occasionally to
13 ft. 
.monday night...northeast winds to 30 kt diminishing to 15 to
25 kt. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...northeast winds to 30 kt. waves 6 to 9 ft occasionally
to 12 ft. 
.tuesday night...northeast winds to 30 kt diminishing to 15 to
25 kt. waves 5 to 8 ft occasionally to 10 ft. 
.wednesday...northeast winds 15 to 25 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.wednesday night...east winds 10 to 20 kt. waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.thursday...east winds 10 to 20 kt becoming northeast 10 to
15 kt. waves 3 to 5 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 1 to
2 ft.  

$$

fzus63 kmkx 201948
glflm 
expires:202609210330;;780309

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 pm cdt sun sep 20 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...

low pressure around 29.8 inches will move from southern illinois 
into the ohio valley today into monday. meanwhile, high pressure 
around 30.4 inches over western ontario today will move eastward 
through monday, reaching quebec by monday night. the high will 
then largely remain in place into mid-week, while strengthening to
around 30.7 inches. gusty northeast winds are expected today into
tonight, becoming east and remaining gusty monday into wednesday.
a few gale force gusts may occur today into monday, mainly over 
southern portions of the lake. building waves are expected over 
western portions of the lake today into the middle of the week. 
lighter easterly winds should then linger for thursday into 
friday, as the high pressure system slowly moves farther east.


lmz261-362-364-366-563-565-567-868-210330-
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-
248 pm cdt sun sep 20 2026

sheboygan wi to pentwater mi north...

.tonight...northeast winds to 30 kt becoming east 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.monday...east winds 15 to 25 kt becoming northeast to 30 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.monday night...northeast winds to 30 kt becoming east 15 to
25 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.tuesday...northeast winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft. 
.tuesday night...east winds to 30 kt diminishing to 10 to 20 kt
overnight. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.wednesday...east winds 15 to 25 kt becoming northeast. waves
3 to 5 ft. 
.wednesday night...east winds 15 to 25 kt becoming southeast
10 to 20 kt. waves 2 to 4 ft. 
.thursday...east winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.friday...southeast winds 5 to 10 kt becoming east. waves 1 ft or
less.  

$$

fzus63 kmqt 202001
glfls 
expires:202609210800;;780774

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 20 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...

this afternoon through monday, a 30.3 inch high builds to 30.4 
inches as it moves east over northern ontario. the high slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches by wednesday, remaining through wednesday 
night before weakening to 30.4 inches by thursday night. by late 
friday, the high weakens to 30.3 inches over the eastern great lakes 
basin as 29.5 inch low pressure develops over montana.




lsz162-210800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sun sep 20 2026 /301 pm cdt sun sep 20 2026/

.late this afternoon...east winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 10 to 20 knots increasing to 15 to 25 knots
late. waves building to 1 to 3 feet. 
.monday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 1 to 3 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing east. waves calm to
2 feet. 

$$

fzus63 kmqt 202001
glfls 
expires:202609210800;;780775

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 20 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...

this afternoon through monday, a 30.3 inch high builds to 30.4 
inches as it moves east over northern ontario. the high slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches by wednesday, remaining through wednesday 
night before weakening to 30.4 inches by thursday night. by late 
friday, the high weakens to 30.3 inches over the eastern great lakes 
basin as 29.5 inch low pressure develops over montana.




lsz263-210800-
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-
401 pm edt sun sep 20 2026

.late this afternoon...northeast winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...northeast winds 15 to 25 knots becoming east 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 5 to 15 knots increasing to 15 to 25 knots.
waves building to 1 to 3 feet. 
.monday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 202001
glfls 
expires:202609210800;;780776

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 20 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...

this afternoon through monday, a 30.3 inch high builds to 30.4 
inches as it moves east over northern ontario. the high slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches by wednesday, remaining through wednesday 
night before weakening to 30.4 inches by thursday night. by late 
friday, the high weakens to 30.3 inches over the eastern great lakes 
basin as 29.5 inch low pressure develops over montana.




lsz264-210800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sun sep 20 2026

.late this afternoon...northeast winds 10 to 20 knots. waves 2 to
4 feet. 
.tonight...northeast winds 5 to 15 knots veering east after
midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots diminishing to less than
10 knots late. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots. waves calm to 2 feet. 
.friday...southwest winds less than 10 knots becoming southeast
5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 202001
glfls 
expires:202609210800;;780777

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 20 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...

this afternoon through monday, a 30.3 inch high builds to 30.4 
inches as it moves east over northern ontario. the high slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches by wednesday, remaining through wednesday 
night before weakening to 30.4 inches by thursday night. by late 
friday, the high weakens to 30.3 inches over the eastern great lakes 
basin as 29.5 inch low pressure develops over montana.




lsz265-210800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sun sep 20 2026

.late this afternoon...northeast winds 20 to 30 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...northeast winds 15 to 25 knots veering east after
midnight. waves subsiding to 2 to 4 feet. 
.monday...east winds 15 to 25 knots diminishing to 10 to 20 knots
late. waves subsiding to calm to 2 feet. 
.monday night...east winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...southeast winds 10 to 20 knots becoming south 5 to
15 knots. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$

fzus63 kmqt 202001
glfls 
expires:202609210800;;780778

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 20 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...

this afternoon through monday, a 30.3 inch high builds to 30.4 
inches as it moves east over northern ontario. the high slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches by wednesday, remaining through wednesday 
night before weakening to 30.4 inches by thursday night. by late 
friday, the high weakens to 30.3 inches over the eastern great lakes 
basin as 29.5 inch low pressure develops over montana.




lsz266-210800-
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-
401 pm edt sun sep 20 2026

.late this afternoon...north winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...northeast winds 10 to 20 knots veering east after
midnight. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.monday...east winds 10 to 20 knots backing northeast late. waves
subsiding to calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots veering east late.
waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 202001
glfls 
expires:202609210800;;780779

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 20 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...

this afternoon through monday, a 30.3 inch high builds to 30.4 
inches as it moves east over northern ontario. the high slowly 
builds to 30.5 inches as it shifts into quebec by midday tuesday, 
trailing a 30.4 inch ridge over lake superior. the high builds 
further to 30.6 inches by wednesday, remaining through wednesday 
night before weakening to 30.4 inches by thursday night. by late 
friday, the high weakens to 30.3 inches over the eastern great lakes 
basin as 29.5 inch low pressure develops over montana.




lsz267-210800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sun sep 20 2026

.late this afternoon...north winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...northeast winds 15 to 25 knots veering east after
midnight, then diminishing to 10 to 20 knots late. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.monday...east winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then backing northeast late. waves subsiding to
calm to 2 feet. 
.monday night...northeast winds 10 to 20 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.tuesday night...northeast winds 10 to 20 knots veering southeast
after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$