fzus61 kbuf 302002
glflo 
expires:202608310300;;624778

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun aug 30 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 frontal boundary north of lake ontario will settle 
south across the lake tonight, then stall just southwest of the lake 
monday. the front will then move back northeast across the lake as a 
warm front monday night through early tuesday. the frontal zone will 
continue to meander north and south over or near the lake through 
much of the week.


loz062-310300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt sun aug 30 2026

.tonight...southwest winds 10 knots or less becoming southeast.
showers likely early, then a chance of showers. showers likely
late. waves 1 foot or less. 
.monday...southeast winds 10 knots or less. showers likely in the
morning, then showers with a chance of thunderstorms in the
afternoon. waves 1 foot or less. 
.monday night...southeast winds 10 knots or less becoming
southwest. showers with a chance of thunderstorms in the evening,
then a chance of showers overnight. waves 1 foot or less. 
.tuesday...southwest winds 5 to 10 knots becoming south. a chance
of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 foot or less. 
.tuesday night...southeast winds 5 to 10 knots becoming
southwest. a chance of showers and thunderstorms in the evening,
then showers likely overnight. waves 1 foot or less. 
.wednesday...southwest winds 5 to 10 knots becoming west. showers
likely with a chance of thunderstorms. waves 1 foot or less. 
.thursday...west winds 5 to 10 knots becoming northwest. a chance
of showers during the day. waves 1 foot or less. 
.friday...northwest winds 10 knots or less becoming north. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 302002
glflo 
expires:202608310300;;624779

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sun aug 30 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 frontal boundary north of lake ontario will settle 
south across the lake tonight, then stall just southwest of the lake 
monday. the front will then move back northeast across the lake as a 
warm front monday night through early tuesday. the frontal zone will 
continue to meander north and south over or near the lake through 
much of the week.


loz063>065-310300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sun aug 30 2026

.tonight...west winds 10 knots or less becoming south. waves
2 feet or less. 
.monday...southeast winds 10 knots or less. a chance of showers.
showers with a chance of thunderstorms late. waves 1 foot or
less. 
.monday night...southeast winds 10 knots or less becoming
southwest. showers likely with a chance of thunderstorms. waves
1 foot or less. 
.tuesday...southwest winds 5 to 10 knots becoming northwest. a
chance of showers. waves 1 foot or less. 
.tuesday night...east winds 10 knots or less becoming south. a
chance of showers. waves 1 foot or less. 
.wednesday...south winds 5 to 15 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms wednesday night. waves 2 feet
or less. 
.thursday...west winds 5 to 10 knots becoming northwest. a chance
of showers during the day. waves 2 feet or less. 
.friday...northwest winds 5 to 10 knots becoming north. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 301943
glfle 
expires:202608310215;;624219

open lake forecast for lake erie
national weather service cleveland oh
343 pm edt sun aug 30 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 north across the region today and settle 
across the eastern great lakes through mid week. low pressure 
29.90 inches moves north of the great lakes wednesday passing a 
cold front through the area on thursday into friday.


lez162-163-310215-
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-
343 pm edt sun aug 30 2026

.tonight...south winds 5 to 10 knots becoming southwest. a slight
chance of showers and thunderstorms this evening, then a chance
of showers with a slight chance of thunderstorms after midnight.
waves 1 foot or less. 
.monday...southwest winds around 10 knots. waves 1 foot or less. 
.monday night...southwest winds 10 to 15 knots. waves 2 feet or
less. 
.tuesday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.tuesday night...southwest winds 5 to 10 knots. waves 1 foot or
less. 
.wednesday...southwest winds 5 to 15 knots becoming west. a
chance of showers and thunderstorms wednesday night. waves 1 foot
or less. 
.thursday...west winds 10 knots or less becoming northeast. a
chance of showers and thunderstorms. waves 1 foot or less. 
.friday...northeast winds 5 to 10 knots. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 301943
glfle 
expires:202608310215;;624220

open lake forecast for lake erie
national weather service cleveland oh
343 pm edt sun aug 30 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 north across the region today and settle 
across the eastern great lakes through mid week. low pressure 
29.90 inches moves north of the great lakes wednesday passing a 
cold front through the area on thursday into friday.


lez164>166-310215-
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-
343 pm edt sun aug 30 2026

.tonight...south winds 5 to 10 knots becoming southwest. a chance
of showers with a slight chance of thunderstorms. waves 1 foot or
less. 
.monday...southwest winds around 10 knots. a slight chance of
showers in the morning. waves 1 to 2 feet. 
.monday night...southwest winds 10 to 15 knots. waves 1 to
3 feet. 
.tuesday...southwest winds 10 to 15 knots. a chance of showers in
the afternoon. waves 1 to 3 feet. 
.tuesday night...southwest winds 5 to 10 knots. a chance of
showers. waves 2 feet or less. 
.wednesday...southwest winds 5 to 15 knots. a chance of showers
during the day, then a chance of showers and thunderstorms
wednesday night. waves 1 to 2 feet. 
.thursday...west winds 5 to 10 knots becoming northeast. a chance
of showers thursday night. waves 2 feet or less. 
.friday...north winds 5 to 10 knots becoming northeast. waves
1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 301943
glfle 
expires:202608310215;;624221

open lake forecast for lake erie
national weather service cleveland oh
343 pm edt sun aug 30 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 north across the region today and settle 
across the eastern great lakes through mid week. low pressure 
29.90 inches moves north of the great lakes wednesday passing a 
cold front through the area on thursday into friday.


lez061-167>169-310215-
ripley to buffalo ny extending from 5nm 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-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
343 pm edt sun aug 30 2026

.tonight...southwest winds 5 to 10 knots becoming south. a chance
of showers with a slight chance of thunderstorms early, then
showers with a slight chance of thunderstorms late this evening.
a chance of showers with a slight chance of thunderstorms after
midnight. waves 1 foot or less. 
.monday...southwest winds 5 to 10 knots. a chance of showers with
a slight chance of thunderstorms early, then a slight chance of
showers and thunderstorms. waves 2 feet or less. 
.monday night...southwest winds 5 to 15 knots. waves 1 to 3 feet.
.tuesday...southwest winds 10 to 15 knots. a chance of showers in
the afternoon. waves 1 to 3 feet. 
.tuesday night...southwest winds 5 to 15 knots. a chance of
showers in the evening, then showers likely overnight. waves 1 to
2 feet. 
.wednesday...southwest winds 5 to 15 knots. a chance of showers
during the day, then a chance of showers and thunderstorms
wednesday night. waves 1 to 2 feet. 
.thursday...southwest winds 5 to 10 knots becoming north. a
chance of showers thursday night. waves 1 to 2 feet. 
.friday...north winds 5 to 10 knots becoming northeast. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 301934
glfsc 
expires:202608310345;;623866

lake st clair forecast
national weather service detroit/pontiac mi
334 pm edt sun aug 30 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...a warm front develops over the great lakes today into
monday, bringing an unsettled period with showers and storms. low
pressure forming over the dakotas slowly tracks across northern
ontario through the midweek. its cold front is likely to stall
across the area on wednesday.


lcz460-310345-
lake st clair-
334 pm edt sun aug 30 2026

.tonight...south winds 5 to 10 knots. mostly cloudy. a chance of
showers and thunderstorms in the evening...then a chance of light
showers after midnight. waves 2 feet or less.
.monday...southwest winds 5 to 10 knots becoming south 10 to 15
knots late in the afternoon. mostly cloudy. a chance of light
showers in the morning. waves 2 feet or less.
.monday night...southwest winds 10 to 15 knots. partly cloudy. a
chance of light showers after midnight. waves 2 feet or less.
.tuesday...southwest winds 5 to 10 knots. mostly sunny with a chance
of showers and thunderstorms. waves 2 feet or less.
.tuesday night...southwest winds 5 to 10 knots. partly cloudy. a
chance of light showers early in the evening. a chance of light
showers after midnight. waves 2 feet or less.
.wednesday...southwest winds 5 to 10 knots. mostly sunny...then
partly cloudy with a chance of showers and thunderstorms in the
evening. waves 2 feet or less.
.thursday...northeast winds 5 to 10 knots. partly cloudy. a chance
of showers and thunderstorms. waves 2 feet or less.
.friday...northeast winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 301932
glflh 
expires:202608310345;;623753

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 pm edt sun aug 30 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...a warm front develops over the great lakes today into
monday, bringing an unsettled period with showers and storms. low
pressure forming over the dakotas slowly tracks across northern
ontario through the midweek. its cold front is likely to stall
across the area on wednesday.


lhz462>464-310345-
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-
332 pm edt sun aug 30 2026

.tonight...south winds 10 to 15 knots decreasing to 5 to 10 knots
early in the morning. showers likely in the evening...then
showers likely and a chance of thunderstorms after midnight.
waves 2 feet or less. 
.monday...south winds 5 to 10 knots increasing to 10 to 15 knots
late in the afternoon. showers likely and a chance of
thunderstorms in the morning...then a chance of showers in the
afternoon. waves 2 feet or less. 
.monday night...south winds 10 to 15 knots becoming southwest
5 to 10 knots after midnight. waves 1 to 3 feet. 
.tuesday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.tuesday night...south winds 5 to 10 knots. a chance of showers.
waves 2 feet or less. 
.wednesday...southwest winds 5 to 10 knots veering to the
northeast late in the afternoon. a chance of showers. a chance of
thunderstorms late in the morning. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots becoming light and
variable. waves 2 feet or less. 
.friday...north winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 301932
glflh 
expires:202608310345;;623752

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 pm edt sun aug 30 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...a warm front develops over the great lakes today into
monday, bringing an unsettled period with showers and storms. low
pressure forming over the dakotas slowly tracks across northern
ontario through the midweek. its cold front is likely to stall
across the area on wednesday.


lhz362-363-310345-
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-
332 pm edt sun aug 30 2026

.tonight...south winds 5 to 10 knots backing to the east in the
late evening and overnight. a chance of showers in the evening...
then showers likely after midnight. waves 2 feet or less. 
.monday...southeast winds 5 to 10 knots increasing to 10 to
15 knots late in the afternoon. showers likely in the morning...
then a chance of showers in the afternoon. waves 2 feet or less. 
.monday night...southeast winds 10 to 15 knots decreasing to 5 to
10 knots by midnight...then veering to the southwest after
midnight. waves 1 to 3 feet. 
.tuesday...west winds 5 to 10 knots early in the morning becoming
light and variable. waves 2 feet or less. 
.tuesday night...southeast winds 5 to 10 knots veering to the
south in the late evening and overnight. waves 2 feet or less. 
.wednesday...southwest winds 5 to 10 knots. a chance of showers.
waves 2 feet or less. 
.thursday...north winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.friday...light and variable winds becoming north 5 to 10 knots
in the late morning and early afternoon...then becoming light and
variable early in the evening becoming north 5 to 10 knots by
midnight. waves 2 feet or less. 


$$

fzus63 kdtx 301932
glflh 
expires:202608310345;;623751

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 pm edt sun aug 30 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...a warm front develops over the great lakes today into
monday, bringing an unsettled period with showers and storms. low
pressure forming over the dakotas slowly tracks across northern
ontario through the midweek. its cold front is likely to stall
across the area on wednesday.


lhz361-310345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
332 pm edt sun aug 30 2026

.tonight...east winds 5 to 10 knots. showers likely after
midnight. waves 2 feet or less. 
.monday...southeast winds 10 to 15 knots decreasing to 5 to
10 knots in the afternoon. a chance of showers. waves 1 to
3 feet. 
.monday night...east winds 5 to 10 knots. waves 1 to 3 feet. 
.tuesday...west winds 5 to 10 knots until late afternoon becoming
light and variable. waves 2 feet or less. 
.tuesday night...light and variable winds becoming south 5 to
10 knots by midnight...then veering to the southwest after
midnight. waves 2 feet or less. 
.wednesday...west winds 5 to 10 knots. a chance of showers late
in the afternoon. waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.friday...light and variable winds becoming north 5 to 10 knots
in the late morning and early afternoon...then becoming light and
variable . waves 2 feet or less. 


$$

fzus63 kmkx 302036
glflm 
expires:202608310315;;626347

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
336 pm cdt sun aug 30 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...

breezy southerly winds will gradually diminish tonight as high 
pressure of 30.1 inches moves south into the appalachians and low
pressure of 29.7 inches lifts into the canadian prairies and
deepens to 29.5 inches. southwesterly winds are expected to
continue through tuesday as low pressure continues to dominate the
pattern and slowly moves east through canada. expecting scattered
thunderstorms on-and-off through the end of the week as a weak 
front lingers across the region. the front will finally sink
southward wednesday into thursday, with light northerly winds 
eventually taking hold.


lmz080-669-671-673-675-777-779-870-872-874-876-878-310315-
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-
336 pm cdt sun aug 30 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 10 to 20 kt. scattered showers with
isolated thunderstorms this evening, then slight chance of
showers and thunderstorms overnight. waves 4 to 6 ft occasionally
to 8 ft subsiding to 2 to 4 ft. 
.monday...south winds 15 to 25 kt. chance of showers and
thunderstorms in the morning, then slight chance of showers and
thunderstorms in the afternoon. waves 3 to 5 ft building to 4 to
6 ft occasionally to 8 ft. 
.monday night...southwest winds 15 to 25 kt diminishing to 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.tuesday...southwest winds 10 to 15 kt becoming south. waves 1 to
3 ft. 
.tuesday night...south winds 10 to 15 kt becoming southwest.
chance of showers overnight. waves 1 to 2 ft. 
.wednesday...southwest winds 10 to 15 kt becoming south. waves
1 to 2 ft. 
.wednesday night...southeast winds 10 to 15 kt backing to north
5 to 10 kt. chance of showers and thunderstorms. waves 1 to 2 ft.
.thursday...north winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.friday...east winds 10 to 15 kt becoming northeast 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 302036
glflm 
expires:202608310315;;626346

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
336 pm cdt sun aug 30 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...

breezy southerly winds will gradually diminish tonight as high 
pressure of 30.1 inches moves south into the appalachians and low
pressure of 29.7 inches lifts into the canadian prairies and
deepens to 29.5 inches. southwesterly winds are expected to
continue through tuesday as low pressure continues to dominate the
pattern and slowly moves east through canada. expecting scattered
thunderstorms on-and-off through the end of the week as a weak 
front lingers across the region. the front will finally sink
southward wednesday into thursday, with light northerly winds 
eventually taking hold.


lmz261-362-364-366-563-565-567-868-310315-
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-
336 pm cdt sun aug 30 2026

sheboygan wi to pentwater mi north...

.tonight...southeast winds 10 to 20 kt. isolated showers and
thunderstorms this evening, then chance of showers and
thunderstorms overnight. waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft. 
.monday...south winds 15 to 25 kt increasing to 30 kt. chance of
showers and thunderstorms in the morning. waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft. 
.monday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt late in the evening, then diminishing to 10 to 15 kt after
midnight becoming west late. waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft. 
.tuesday...south winds 10 to 15 kt. waves 1 to 3 ft. 
.tuesday night...southwest winds 10 to 15 kt becoming west 5 to
10 kt. waves 1 to 2 ft. 
.wednesday...west winds 10 to 15 kt veering to north. waves 1 to
2 ft. 
.wednesday night...northeast winds 10 to 15 kt diminishing to
5 to 10 kt. chance of showers. waves 1 ft or less. 
.thursday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 ft or less. 
.friday...east winds 10 to 15 kt becoming northeast 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmqt 302001
glfls 
expires:202608310800;;624703

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun aug 30 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 low over the northern plains this afternoon lifts into 
the canadian prairies tonight and deepens to 29.3 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering through tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 29.9 
inches then returns to the lake on wednesday and strengthens to 30.0 
inches through friday. 




lsz264-310800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sun aug 30 2026

.late this afternoon...east winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...east winds 10 to 20 knots. a chance of showers and a
slight chance of thunderstorms after midnight. waves building to
1 to 3 feet. 
.monday...east winds 10 to 20 knots veering southeast in the
afternoon, then diminishing to 5 to 15 knots late. a chance of
showers and a slight chance of thunderstorms. waves building to
2 to 4 feet. 
.monday night...west winds 5 to 15 knots backing southwest late.
waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 15 to 25 knots. waves building to 1 to
3 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming west less
than 10 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...west winds less than 10 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202608310800;;624704

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun aug 30 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 low over the northern plains this afternoon lifts into 
the canadian prairies tonight and deepens to 29.3 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering through tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 29.9 
inches then returns to the lake on wednesday and strengthens to 30.0 
inches through friday. 




lsz265-310800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sun aug 30 2026

.late this afternoon...east winds 15 to 25 knots. a slight chance
of showers. waves calm to 2 feet building to 1 to 3 feet. 
.tonight...east winds 10 to 20 knots becoming southeast 15 to
25 knots after midnight. showers likely and a slight chance of
thunderstorms after midnight. waves 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. a slight chance of showers. a slight
chance of thunderstorms by mid afternoon. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.monday night...west winds 10 to 20 knots. a slight chance of
showers through midnight. waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 10 to 20 knots becoming west 15 to
25 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering north by mid
afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...east winds 5 to 15 knots. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots becoming southeast 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202608310800;;624705

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun aug 30 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 low over the northern plains this afternoon lifts into 
the canadian prairies tonight and deepens to 29.3 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering through tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 29.9 
inches then returns to the lake on wednesday and strengthens to 30.0 
inches through friday. 




lsz266-310800-
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 aug 30 2026

.late this afternoon...east winds 10 to 20 knots. a slight chance
of showers. waves calm to 2 feet. 
.tonight...east winds 10 to 20 knots veering southeast late. a
chance of showers and a slight chance of thunderstorms after
midnight. waves building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. a chance of showers and a slight
chance of thunderstorms. waves building to 2 to 4 feet. 
.monday night...west winds 10 to 20 knots. a slight chance of
thunderstorms through midnight. a slight chance of showers. waves
subsiding to calm to 2 feet. 
.tuesday...south winds 10 to 20 knots veering southwest by mid
afternoon. waves building to 1 to 3 feet. 
.tuesday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots veering east. waves calm to
2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202608310800;;624706

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun aug 30 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 low over the northern plains this afternoon lifts into 
the canadian prairies tonight and deepens to 29.3 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering through tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 29.9 
inches then returns to the lake on wednesday and strengthens to 30.0 
inches through friday. 




lsz267-310800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sun aug 30 2026

.late this afternoon...east winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...east winds 10 to 20 knots becoming southeast 15 to
25 knots late. a chance of showers and a slight chance of
thunderstorms after midnight. waves building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots diminishing to 10 to
20 knots late. a chance of showers and thunderstorms. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.monday night...southwest winds 10 to 20 knots veering west late.
a slight chance of thunderstorms through midnight. a chance of
showers. waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots. waves calm to 2 feet.
.wednesday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots veering east. waves
calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202608310800;;624701

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun aug 30 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 low over the northern plains this afternoon lifts into 
the canadian prairies tonight and deepens to 29.3 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering through tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 29.9 
inches then returns to the lake on wednesday and strengthens to 30.0 
inches through friday. 




lsz162-310800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sun aug 30 2026 /301 pm cdt sun aug 30 2026/

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

$$

fzus63 kmqt 302001
glfls 
expires:202608310800;;624702

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun aug 30 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 low over the northern plains this afternoon lifts into 
the canadian prairies tonight and deepens to 29.3 inches by monday 
morning. this will bring 29.8 inch troughing over lake superior 
tonight into monday, lingering through tuesday as the low crosses 
northern ontario at around 29.6 inches. ridging of around 29.9 
inches then returns to the lake on wednesday and strengthens to 30.0 
inches through friday. 




lsz263-310800-
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 aug 30 2026

.late this afternoon...east winds 15 to 25 knots. a slight chance
of showers. waves 1 to 3 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of showers through midnight. a
chance of thunderstorms. showers likely after midnight. waves
1 to 3 feet. 
.monday...east winds 10 to 20 knots becoming southeast 5 to
15 knots in the afternoon, then veering west late. a slight
chance of showers and thunderstorms through early afternoon.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.monday night...west winds 5 to 15 knots backing southwest late.
waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.wednesday night...east winds less than 10 knots. waves calm to
2 feet. 
.thursday...east winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$