fzus61 kbuf 231405
glflo 
expires:202609232115;;927120

open lake forecast for lake ontario
national weather service buffalo ny
issued by national weather service cleveland oh
1005 am edt wed sep 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 30.2 inch high will settle over the lower great lakes 
tonight. this high will then drift to the eastern seaboard tuesday, 
then east of the mid atlantic coast by wednesday. meanwhile, a 29.3 
inch low over far northwest ontario province tuesday night will move 
to hudson bay by late wednesday, then to northern quebec by thursday 
while deepening to 29.0 inches. a trailing cold front will cross the 
lower great lakes wednesday night, with a 30.0 inch high building 
east across the eastern great lakes region thursday through friday, 
before sliding east into new england by saturday.


loz063>065-232115-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1005 am edt wed sep 23 2026

.this afternoon...east winds 10 to 15 knots becoming northeast
15 to 20 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...northeast winds 15 to 20 knots becoming southeast 5 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.thursday...east winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.thursday night...northeast winds 10 to 15 knots. waves 1 to
3 feet. 
.friday...northeast winds 10 to 15 knots becoming north 15 to
20 knots. waves 1 to 3 feet. 
.saturday...north winds 15 to 20 knots. waves 2 to 4 feet. 
.sunday...north winds 15 to 20 knots becoming northeast 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 

$$

fzus61 kbuf 231405
glflo 
expires:202609232115;;927119

open lake forecast for lake ontario
national weather service buffalo ny
issued by national weather service cleveland oh
1005 am edt wed sep 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 30.2 inch high will settle over the lower great lakes 
tonight. this high will then drift to the eastern seaboard tuesday, 
then east of the mid atlantic coast by wednesday. meanwhile, a 29.3 
inch low over far northwest ontario province tuesday night will move 
to hudson bay by late wednesday, then to northern quebec by thursday 
while deepening to 29.0 inches. a trailing cold front will cross the 
lower great lakes wednesday night, with a 30.0 inch high building 
east across the eastern great lakes region thursday through friday, 
before sliding east into new england by saturday.


loz062-232115-
lake ontario open waters from the niagara river to hamlin beach-
1005 am edt wed sep 23 2026

.this afternoon...east winds 15 to 20 knots. waves 3 to 6 feet. 
.tonight...east winds 15 to 25 knots becoming southeast and
diminishing to 10 to 15 knots. waves 3 to 6 feet subsiding to
2 to 3 feet. 
.thursday...southeast winds 5 to 15 knots becoming east. waves
1 to 3 feet. 
.thursday night...east winds 5 to 15 knots becoming northeast.
waves 1 to 2 feet. 
.friday...northeast winds 5 to 15 knots becoming north. waves
2 feet or less. 
.saturday...north winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday...north winds 5 to 15 knots. waves 1 to 3 feet subsiding
to 1 foot or less. 

$$

fzus61 kcle 231325
glfle 
expires:202609232015;;926059

open lake forecast for lake erie
national weather service cleveland oh
925 am edt wed sep 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...
a trough averaging 30.20 inches will persist across the ohio
valley today before moving south. high pressure of 30.40 inches 
will build south across the great lakes thursday and influence the
great lakes through early next week.


lez162-163-232015-
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-
925 am edt wed sep 23 2026

.rest of today...east winds 15 to 25 knots. a slight chance of
showers late this morning, then a chance of showers early this
afternoon. a slight chance of showers late. waves 3 to 6 feet. 
.tonight...east winds 15 to 20 knots. waves 3 to 6 feet subsiding
to 2 to 4 feet. 
.thursday...east winds 15 to 20 knots. waves 2 to 4 feet. 
.thursday night...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 5 to 15 knots. waves 1 to 3 feet. 
.saturday...northeast winds 5 to 10 knots becoming north. waves
2 feet or less. 
.sunday...north winds 10 knots or less. waves 1 foot or less. 

$$

fzus61 kcle 231325
glfle 
expires:202609232015;;926060

open lake forecast for lake erie
national weather service cleveland oh
925 am edt wed sep 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...
a trough averaging 30.20 inches will persist across the ohio
valley today before moving south. high pressure of 30.40 inches 
will build south across the great lakes thursday and influence the
great lakes through early next week.


lez164>168-232015-
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-
925 am edt wed sep 23 2026

.rest of today...east winds 15 to 25 knots. a slight chance of
showers. waves 3 to 6 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.tonight...east winds 15 to 25 knots. waves 4 to 7 feet subsiding
to 3 to 6 feet. waves occasionally around 9 feet. 
.thursday...east winds 15 to 20 knots becoming northeast. waves
2 to 4 feet. 
.thursday night...northeast winds 15 to 20 knots becoming east
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. 
.saturday...northeast winds 5 to 15 knots becoming north. waves
1 to 3 feet. 
.sunday...north winds 5 to 10 knots. waves 2 feet or less. 

$$

fzus61 kcle 231325
glfle 
expires:202609232015;;926061

open lake forecast for lake erie
national weather service cleveland oh
925 am edt wed sep 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...
a trough averaging 30.20 inches will persist across the ohio
valley today before moving south. high pressure of 30.40 inches 
will build south across the great lakes thursday and influence the
great lakes through early next week.


lez061-169-232015-
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-
925 am edt wed sep 23 2026

.rest of today...east winds 15 to 20 knots. waves 1 to 3 feet
building to 2 to 4 feet. 
.tonight...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.thursday...east winds 5 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet. 
.thursday night...northeast winds 15 to 20 knots becoming east
5 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots becoming north. waves
2 feet or less. 
.sunday...north winds 10 knots or less becoming northeast. waves
1 foot or less. 

$$

fzus63 kdtx 231317
glfsc 
expires:202609232130;;925819

lake st clair forecast
national weather service detroit/pontiac mi
917 am edt wed sep 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...high pressure, 30.70 inches, centers over quebec today
leading to modest easterly winds over the central great lakes. a
weak low pressure system emerges over the northern portion of the
ohio valley this morning, and could lead to some light showers
for western lake erie. mainly dry with calmer winds through the
rest of the week, and into the weekend.


lcz460-232130-
lake st clair-
917 am edt wed sep 23 2026

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

.rest of today...east winds 15 to 20 knots. partly sunny. waves 1 to
3 feet.
.tonight...east winds 15 to 20 knots diminishing to 10 to 15 knots
early in the morning. partly cloudy in the evening then clearing.
waves 1 to 3 feet.
.thursday...east winds 10 to 15 knots. sunny. waves 2 feet or less.
.thursday night...east winds 10 to 15 knots. mostly clear. waves 2
feet or less.
.friday...northeast winds 5 to 10 knots becoming north 10 to 15
knots in the evening. mostly sunny in the morning becoming clear.
waves 2 feet or less.
.saturday...northeast winds 5 to 10 knots. clear. waves 2 feet or
less.
.sunday...northeast winds 5 to 10 knots. mostly clear. waves 2 feet
or less.

$$

fzus63 kdtx 231316
glflh 
expires:202609232130;;925817

open lake forecast for lake huron
national weather service detroit/pontiac mi
916 am edt wed sep 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...high pressure, 30.70 inches, centers over quebec today
leading to modest easterly winds over the central great lakes. a
weak low pressure system emerges over the northern portion of the
ohio valley this morning, and could lead to some light showers
for western lake erie. mainly dry with calmer winds through the
rest of the week, and into the weekend.


lhz462>464-232130-
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-
916 am edt wed sep 23 2026

.rest of today...east winds 15 to 20 knots decreasing to 10 to
15 knots in the afternoon. waves 2 to 4 feet. 
.tonight...east winds 15 to 20 knots decreasing to 10 to 15 knots
early in the morning. waves 3 to 5 feet. 
.thursday...east winds 10 to 15 knots decreasing to 5 to 10 knots
early in the afternoon. waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.thursday night...east winds 5 to 10 knots increasing to 10 to
15 knots by midnight...then becoming southeast 5 to 10 knots
after midnight. waves 2 feet or less. 
.friday...east winds 5 to 10 knots backing to the northeast.
waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.sunday...light and variable winds becoming north 5 to 10 knots.
waves 2 feet or less. 


$$

fzus63 kdtx 231316
glflh 
expires:202609232130;;925816

open lake forecast for lake huron
national weather service detroit/pontiac mi
916 am edt wed sep 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...high pressure, 30.70 inches, centers over quebec today
leading to modest easterly winds over the central great lakes. a
weak low pressure system emerges over the northern portion of the
ohio valley this morning, and could lead to some light showers
for western lake erie. mainly dry with calmer winds through the
rest of the week, and into the weekend.


lhz362-363-232130-
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-
916 am edt wed sep 23 2026

.rest of today...east winds 15 to 20 knots decreasing to 10 to
15 knots in the afternoon. waves 2 to 4 feet. 
.tonight...northeast winds 10 to 15 knots becoming east 15 to
20 knots late in the evening...then becoming southeast 10 to
15 knots after midnight. waves 3 to 5 feet. 
.thursday...southeast winds 10 to 15 knots becoming east 5 to
10 knots early in the afternoon. waves 2 to 4 feet subsiding to
1 to 3 feet in the late morning and afternoon. 
.thursday night...northeast winds 5 to 10 knots veering to the
east after midnight. waves 2 feet or less. 
.friday...light and variable winds. waves 2 feet or less. 
.saturday...north winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.sunday...light and variable winds. waves 2 feet or less. 


$$

fzus63 kdtx 231316
glflh 
expires:202609232130;;925815

open lake forecast for lake huron
national weather service detroit/pontiac mi
916 am edt wed sep 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...high pressure, 30.70 inches, centers over quebec today
leading to modest easterly winds over the central great lakes. a
weak low pressure system emerges over the northern portion of the
ohio valley this morning, and could lead to some light showers
for western lake erie. mainly dry with calmer winds through the
rest of the week, and into the weekend.


lhz361-232130-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
916 am edt wed sep 23 2026

.rest of today...east winds 15 to 20 knots decreasing to 10 to
15 knots in the afternoon. waves 3 to 5 feet. 
.tonight...east winds 10 to 15 knots decreasing to 5 to 10 knots
after midnight. waves 2 to 4 feet subsiding to 1 to 3 feet in the
late evening and overnight. 
.thursday...southeast winds 5 to 10 knots becoming east 10 to
15 knots early in the afternoon. waves 1 to 3 feet. 
.thursday night...southeast winds 5 to 10 knots  becoming light
and variable. waves 1 to 3 feet. 
.friday...light and variable winds. waves 2 feet or less. 
.saturday...light and variable winds. waves 2 feet or less. 
.sunday...light and variable winds. waves nearly calm. 


$$

fzus63 kmkx 231355
glflm 
expires:202609232115;;926685

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
855 am cdt wed sep 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...

an east to west high pressure area around 30.6 inches will remain
from southern quebec to ontario through thursday. modest easterly
winds will continue, then become east southeast for thursday 
night into the weekend as the high reorients from the northern
great lakes to james bay.


lmz080-669-671-673-675-777-779-870-872-874-876-878-232115-
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-
855 am cdt wed sep 23 2026

sheboygan wi to pentwater mi south...

.rest of today...east winds 15 to 25 kt becoming northeast 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.tonight...northeast winds 10 to 20 kt becoming east. waves 3 to
5 ft. 
.thursday...east winds 10 to 20 kt diminishing to 5 to 10 kt.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.thursday night...east winds 10 to 15 kt becoming southeast.
waves 2 to 4 ft. 
.friday...southeast winds 10 to 15 kt becoming east 5 to 10 kt.
waves 1 to 3 ft. 
.friday night...east winds 10 to 15 kt becoming southeast. waves
1 to 2 ft. 
.saturday...southeast winds 10 to 15 kt. waves 1 to 3 ft. 
.sunday...southeast winds 5 to 10 kt becoming south. waves 1 to
2 ft.  

$$

fzus63 kmkx 231355
glflm 
expires:202609232115;;926684

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
855 am cdt wed sep 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...

an east to west high pressure area around 30.6 inches will remain
from southern quebec to ontario through thursday. modest easterly
winds will continue, then become east southeast for thursday 
night into the weekend as the high reorients from the northern
great lakes to james bay.


lmz261-362-364-366-563-565-567-868-232115-
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-
855 am cdt wed sep 23 2026

sheboygan wi to pentwater mi north...

.rest of today...east winds 10 to 20 kt becoming northeast 15 to
25 kt. waves 3 to 5 ft. 
.tonight...east winds 10 to 20 kt becoming southeast. waves 2 to
4 ft. 
.thursday...southeast winds 10 to 20 kt becoming northeast. waves
2 to 4 ft. 
.thursday night...east winds 10 to 20 kt becoming southeast 10 to
15 kt. waves 1 to 3 ft. 
.friday...south winds 5 to 10 kt increasing to 10 to 15 kt. waves
1 to 3 ft. 
.friday night...east winds 10 to 15 kt becoming southeast. waves
1 ft or less. 
.saturday...southeast winds 10 to 15 kt becoming south. waves
1 to 2 ft. 
.sunday...south winds 5 to 10 kt becoming southwest 10 to 15 kt.
waves 1 ft or less.  

$$

fzus63 kmqt 231401
glfls 
expires:202609232000;;926875

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed sep 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...

30.7 inch high pressure is centered over quebec today, keeping a 
30.5 inch ridge over lake superior while mainly easterly surface 
winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as winds veer 
southerly. by late friday, the high weakens to 30.2 inches over the 
eastern great lakes basin as 29.5 inch low pressure develops over 
montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies. by sunday morning, high pressure 
shifts northeast, leaving pressure to 30.1 inches over lake 
superior, which decreases to 30.0 inches by monday morning as the 
high shifts toward the canadian maritimes.




lsz162-232000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt wed sep 23 2026 /901 am cdt wed sep 23 2026/

.rest of today...southeast winds 5 to 15 knots backing east in
the afternoon, then becoming northeast 10 to 20 knots late. waves
calm to 2 feet building to 1 to 3 feet. 
.tonight...east winds 5 to 15 knots veering south after midnight.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.thursday...south winds 5 to 15 knots backing east late. a slight
chance of showers by mid afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots becoming south less
than 10 knots after midnight. waves calm to 2 feet. 
.friday...south winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots veering south. a chance of
showers. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots becoming west less than
10 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202609232000;;926876

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed sep 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...

30.7 inch high pressure is centered over quebec today, keeping a 
30.5 inch ridge over lake superior while mainly easterly surface 
winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as winds veer 
southerly. by late friday, the high weakens to 30.2 inches over the 
eastern great lakes basin as 29.5 inch low pressure develops over 
montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies. by sunday morning, high pressure 
shifts northeast, leaving pressure to 30.1 inches over lake 
superior, which decreases to 30.0 inches by monday morning as the 
high shifts toward the canadian maritimes.




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-
1001 am edt wed sep 23 2026

.rest of today...southeast winds 5 to 15 knots backing east late.
waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering south after
midnight. waves building to 1 to 3 feet. 
.thursday...south winds 5 to 15 knots backing east late. waves
subsiding to calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots veering south. a chance
of showers. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202609232000;;926877

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed sep 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...

30.7 inch high pressure is centered over quebec today, keeping a 
30.5 inch ridge over lake superior while mainly easterly surface 
winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as winds veer 
southerly. by late friday, the high weakens to 30.2 inches over the 
eastern great lakes basin as 29.5 inch low pressure develops over 
montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies. by sunday morning, high pressure 
shifts northeast, leaving pressure to 30.1 inches over lake 
superior, which decreases to 30.0 inches by monday morning as the 
high shifts toward the canadian maritimes.




lsz264-232000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt wed sep 23 2026

.rest of today...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southeast winds 5 to 15 knots veering south after
midnight. waves building to 1 to 3 feet. 
.thursday...south winds 5 to 15 knots backing southeast late.
waves subsiding to calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots becoming south less than
10 knots by mid afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots veering south. waves
calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots diminishing to less than
10 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202609232000;;926878

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed sep 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...

30.7 inch high pressure is centered over quebec today, keeping a 
30.5 inch ridge over lake superior while mainly easterly surface 
winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as winds veer 
southerly. by late friday, the high weakens to 30.2 inches over the 
eastern great lakes basin as 29.5 inch low pressure develops over 
montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies. by sunday morning, high pressure 
shifts northeast, leaving pressure to 30.1 inches over lake 
superior, which decreases to 30.0 inches by monday morning as the 
high shifts toward the canadian maritimes.




lsz265-232000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt wed sep 23 2026

.rest of today...southeast winds 10 to 20 knots becoming east
15 to 25 knots late. waves calm to 2 feet building to 1 to
3 feet. 
.tonight...southeast winds 15 to 25 knots becoming south 10 to
20 knots after midnight. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.thursday...south winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. waves calm to
2 feet. 
.thursday night...south winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots veering south. waves
calm to 2 feet. 
.sunday...south winds 5 to 15 knots veering west. waves calm to
2 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202609232000;;926879

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed sep 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...

30.7 inch high pressure is centered over quebec today, keeping a 
30.5 inch ridge over lake superior while mainly easterly surface 
winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as winds veer 
southerly. by late friday, the high weakens to 30.2 inches over the 
eastern great lakes basin as 29.5 inch low pressure develops over 
montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies. by sunday morning, high pressure 
shifts northeast, leaving pressure to 30.1 inches over lake 
superior, which decreases to 30.0 inches by monday morning as the 
high shifts toward the canadian maritimes.




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-
1001 am edt wed sep 23 2026

.rest of today...southeast winds 10 to 20 knots backing east
late. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight. waves building to 1 to 3 feet. 
.thursday...south winds 10 to 20 knots becoming southeast 5 to
15 knots in the afternoon, then increasing to 10 to 20 knots
late. waves subsiding to calm to 2 feet. 
.thursday night...south winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots veering south. waves
calm to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202609232000;;926880

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed sep 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...

30.7 inch high pressure is centered over quebec today, keeping a 
30.5 inch ridge over lake superior while mainly easterly surface 
winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as winds veer 
southerly. by late friday, the high weakens to 30.2 inches over the 
eastern great lakes basin as 29.5 inch low pressure develops over 
montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies. by sunday morning, high pressure 
shifts northeast, leaving pressure to 30.1 inches over lake 
superior, which decreases to 30.0 inches by monday morning as the 
high shifts toward the canadian maritimes.




lsz267-232000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt wed sep 23 2026

.rest of today...southeast winds 10 to 20 knots backing east
late. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight. waves calm to 2 feet. 
.thursday...southeast winds 10 to 20 knots backing east late.
waves calm to 2 feet. 
.thursday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 

$$