fzus61 kbuf 212003
glflo 
expires:202610220300;;956167

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed oct 21 2026

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a high pressure ridge averaging 30.4 inches exits slowly 
toward the canadian maritimes before a weak cold front sweeps 
southeastward across the lake on thursday. behind the front, another 
ridge averaging 30.5 inches affects the lake through this weekend as 
the embedded high pressure center moves southeastward across the 
great lakes through friday and then moves farther southeastward to 
atlantic waters near long island and new jersey by this sunday.


loz062-220300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt wed oct 21 2026

.tonight...light and variable winds becoming west 5 to 10 knots.
waves 1 foot or less. 
.thursday...northwest winds 10 knots or less becoming north.
waves 1 foot or less. 
.thursday night...north winds 10 to 15 knots becoming northeast
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.friday...east winds 5 to 15 knots. waves 1 to 3 feet. 
.friday night...east winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.saturday...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.sunday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.monday...west winds 5 to 15 knots becoming northeast. waves 1 to
2 feet. 

$$

fzus61 kbuf 212003
glflo 
expires:202610220300;;956168

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed oct 21 2026

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a high pressure ridge averaging 30.4 inches exits slowly 
toward the canadian maritimes before a weak cold front sweeps 
southeastward across the lake on thursday. behind the front, another 
ridge averaging 30.5 inches affects the lake through this weekend as 
the embedded high pressure center moves southeastward across the 
great lakes through friday and then moves farther southeastward to 
atlantic waters near long island and new jersey by this sunday.


loz063>065-220300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt wed oct 21 2026

.tonight...north winds 10 knots or less becoming northwest. waves
1 foot or less. 
.thursday...northwest winds 5 to 15 knots becoming north. waves
1 to 3 feet. 
.thursday night...north winds 15 to 20 knots becoming northeast.
waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 
.friday...northeast winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.friday night...northeast winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.saturday...southeast winds less than 10 knots becoming south
10 to 15 knots. waves 2 feet or less. 
.sunday...south winds 5 to 15 knots becoming southwest. waves
2 feet or less. 
.monday...southwest winds 5 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 2 feet. 

$$

fzus61 kcle 211944
glfle 
expires:202610220215;;955590

open lake forecast for lake erie
national weather service cleveland oh
344 pm edt wed oct 21 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... 
high pressure will maintain influence over lake erie for the next
several days. the high will be around 30.20 inches through 
thursday, before re-intensfying to 30.40 inches over southern 
ontario thursday night into friday.


lez165>167-220215-
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-
344 pm edt wed oct 21 2026

.tonight...northeast winds less than 10 knots. waves 1 foot or
less. 
.thursday...north winds 10 knots or less. waves 1 foot or less. 
.thursday night...north winds 10 to 15 knots becoming east. waves
1 foot or less building to 2 to 4 feet. 
.friday...east winds 5 to 15 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet. 
.friday night...east winds 5 to 15 knots becoming southeast.
waves 1 to 3 feet. 
.saturday...southeast winds 10 knots or less becoming south.
waves 2 feet or less. 
.sunday...south winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.monday...southwest winds 5 to 15 knots becoming northeast. waves
2 feet or less. 

$$

fzus61 kcle 211944
glfle 
expires:202610220215;;955589

open lake forecast for lake erie
national weather service cleveland oh
344 pm edt wed oct 21 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... 
high pressure will maintain influence over lake erie for the next
several days. the high will be around 30.20 inches through 
thursday, before re-intensfying to 30.40 inches over southern 
ontario thursday night into friday.


lez162>164-220215-
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-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
344 pm edt wed oct 21 2026

.tonight...east winds less than 10 knots. waves 1 foot or less. 
.thursday...northwest winds 10 knots or less. waves 1 foot or
less. 
.thursday night...north winds 10 knots or less becoming
northeast. waves 1 to 3 feet. 
.friday...northeast winds 10 knots or less becoming east. waves
1 to 3 feet. 
.friday night...east winds 5 to 15 knots becoming southeast.
waves 1 to 3 feet. 
.saturday...southeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.sunday...south winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.monday...southwest winds 5 to 15 knots becoming northeast. waves
2 feet or less. 

$$

fzus61 kcle 211944
glfle 
expires:202610220215;;955591

open lake forecast for lake erie
national weather service cleveland oh
344 pm edt wed oct 21 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... 
high pressure will maintain influence over lake erie for the next
several days. the high will be around 30.20 inches through 
thursday, before re-intensfying to 30.40 inches over southern 
ontario thursday night into friday.


lez061-168-169-220215-
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-
344 pm edt wed oct 21 2026

.tonight...northeast winds 10 knots or less becoming north. waves
1 foot or less. 
.thursday...north winds 10 knots or less. waves 1 foot or less. 
.thursday night...north winds 5 to 15 knots becoming east. waves
1 foot or less building to 2 to 4 feet. 
.friday...east winds 5 to 10 knots becoming northeast. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.friday night...northeast winds 5 to 15 knots becoming southeast.
waves 2 feet or less. 
.saturday...south winds 10 knots or less. waves 2 feet or less. 
.sunday...south winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.monday...southwest winds 5 to 15 knots becoming northeast. waves
1 to 2 feet. 

$$

fzus63 kdtx 211949
glflh 
expires:202610220400;;955730

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 pm edt wed oct 21 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 weak and dry cold front will track through the
central great lakes tonight. another large high pressure, 30.40
inches, then builds over the area thursday and friday.


lhz363-462>464-220400-
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-
349 pm edt wed oct 21 2026

.tonight...southeast winds 5 to 10 knots early in the evening
becoming light and variable...then becoming northwest 5 to
10 knots early in the morning. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots. waves 2 feet or less. 
.thursday night...northeast winds 5 to 10 knots veering to the
east after midnight. waves 1 to 3 feet. 
.friday...southeast winds 5 to 10 knots. waves 2 feet or less. 
.friday night...east winds 5 to 10 knots becoming southeast 10 to
15 knots in the late evening and overnight. waves 1 to 3 feet. 
.saturday...southeast winds 5 to 10 knots becoming south 10 to
15 knots late in the afternoon. waves 1 to 3 feet building to
2 to 4 feet late in the evening. 
.sunday...south winds 10 to 15 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet. 
.monday...west winds 5 to 10 knots veering to the north in the
late morning and early afternoon...then increasing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet by midnight.


$$

fzus63 kdtx 211949
glflh 
expires:202610220400;;955729

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 pm edt wed oct 21 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 weak and dry cold front will track through the
central great lakes tonight. another large high pressure, 30.40
inches, then builds over the area thursday and friday.


lhz361-362-220400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
349 pm edt wed oct 21 2026

.tonight...light and variable winds becoming northwest 5 to
10 knots early in the morning. patchy fog after midnight. waves
2 feet or less. 
.thursday...north winds 5 to 10 knots until late afternoon
becoming light and variable. patchy fog in the morning. waves
2 feet or less. 
.thursday night...light and variable winds becoming east 5 to
10 knots after midnight. waves 2 feet or less. 
.friday...southeast winds 5 to 10 knots. waves 2 feet or less. 
.friday night...southeast winds 5 to 10 knots veering to the
south after midnight. waves 1 to 3 feet. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet late in the
evening. 
.sunday...south winds 10 to 15 knots decreasing to 5 to 10 knots
early in the evening...then veering to the west by midnight.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...north winds 5 to 10 knots increasing to 10 to 15 knots
by midnight. waves 1 to 3 feet. 


$$

fzus63 kdtx 211949
glfsc 
expires:202610220400;;955733

lake st clair forecast
national weather service detroit/pontiac mi
349 pm edt wed oct 21 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 weak and dry cold front will track through the
central great lakes tonight. another large high pressure, 30.40
inches, then builds over the area thursday and friday.


lcz460-220400-
lake st clair-
349 pm edt wed oct 21 2026

.tonight...light and variable winds. mostly clear. waves nearly
calm.
.thursday...north winds 5 to 10 knots in the morning becoming light
and variable...then becoming north 5 to 10 knots late in the
afternoon. mostly sunny. waves 2 feet or less.
.thursday night...northeast winds 10 to 15 knots diminishing to 5 to
10 knots after midnight. partly cloudy. patchy fog after midnight.
waves 2 feet or less.
.friday...east winds 5 to 10 knots. mostly sunny. patchy fog early
in the morning. waves 2 feet or less.
.friday night...southeast winds 10 to 15 knots becoming east 5 to 10
knots in the late evening and overnight. clear. waves 2 feet or
less.
.saturday...southeast winds 5 to 10 knots. clear. waves 2 feet or
less.
.sunday...south winds 5 to 10 knots. mostly clear. waves 2 feet or
less.
.monday...northeast winds 10 to 15 knots. partly cloudy. waves 2
feet or less.

$$

fzus63 kmkx 211842
glflm 
expires:202610220315;;953900

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
142 pm cdt wed oct 21 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...

a ridge of 30.3 inch high pressure is centered from the 
mississippi river into ontario this afternoon, resulting in light 
south to southwest winds across the open waters. winds will trend 
out of the northeast tonight through thursday night as the surface
ridge nudges east toward the ohio river and quebec. areas of fog 
are possible over the northern two-thirds of the lake late tonight
into thursday. whether any fog becomes dense remains uncertain, 
with visibility and satellite trends being closely monitored 
through this part of the period. persistent southerly winds will 
become established friday through the weekend as a cold front 
moves through the northern great plains and 30.5 inch high 
pressure settles into the northeastern united states. winds could 
be breezy at times, though widespread gales are not anticipated at
this time. will continue to monitor for possible increases 
through the second half of the week. aforementioned cold front 
will cross the waters sunday night, bringing a northerly wind 
shift through the first half of next week. rain showers are 
possible along the passing front.


lmz261-362-364-366-563-565-567-868-220315-
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-
142 pm cdt wed oct 21 2026

sheboygan wi to pentwater mi north...

.tonight...southwest winds 5 to 10 kt veering to north. patchy
fog overnight. waves 1 to 2 ft. 
.thursday...northeast winds 5 to 10 kt. patchy fog. waves 1 ft or
less. 
.thursday night...northeast winds 5 to 10 kt veering to southeast
10 to 15 kt. patchy fog. waves 1 to 2 ft. 
.friday...south winds 10 to 20 kt. waves 2 to 4 ft. 
.friday night...south winds 10 to 15 kt increasing to 10 to
20 kt. waves 2 to 4 ft. 
.saturday...south winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft building to 4 to 7 ft occasionally
to 9 ft. 
.saturday night...south winds to 30 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.sunday...southwest winds 15 to 25 kt becoming northwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft.  

$$

fzus63 kmkx 211842
glflm 
expires:202610220315;;953901

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
142 pm cdt wed oct 21 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...

a ridge of 30.3 inch high pressure is centered from the 
mississippi river into ontario this afternoon, resulting in light 
south to southwest winds across the open waters. winds will trend 
out of the northeast tonight through thursday night as the surface
ridge nudges east toward the ohio river and quebec. areas of fog 
are possible over the northern two-thirds of the lake late tonight
into thursday. whether any fog becomes dense remains uncertain, 
with visibility and satellite trends being closely monitored 
through this part of the period. persistent southerly winds will 
become established friday through the weekend as a cold front 
moves through the northern great plains and 30.5 inch high 
pressure settles into the northeastern united states. winds could 
be breezy at times, though widespread gales are not anticipated at
this time. will continue to monitor for possible increases 
through the second half of the week. aforementioned cold front 
will cross the waters sunday night, bringing a northerly wind 
shift through the first half of next week. rain showers are 
possible along the passing front.


lmz080-669-671-673-675-777-779-870-872-874-876-878-220315-
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-
142 pm cdt wed oct 21 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 5 to 10 kt veering to west. patchy fog
overnight. waves 1 ft or less. 
.thursday...northeast winds 5 to 10 kt. patchy fog. waves 1 ft or
less. 
.thursday night...northeast winds 5 to 10 kt veering to
southeast. waves 1 ft or less building to 1 to 3 ft. 
.friday...southeast winds 10 to 20 kt. waves 2 to 4 ft. 
.friday night...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 3 ft building to 2 to 4 ft. 
.saturday...south winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft building to 4 to 7 ft occasionally
to 9 ft. 
.saturday night...south winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.sunday...southwest winds 10 to 20 kt. waves 3 to 5 ft. 
.monday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 2 to 4 ft.  

$$

fzus63 kmqt 212008 cca
glfls 
expires:202610220800;;956765

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt wed oct 21 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 weak 30.0 inch trough over the lake will move east tonight as 
another high pressure builds in from the west in its wake, becoming 
centered over northern ontario and the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low moves just north of lake 
winnipeg. the low then lifts northeast to hudson bay on sunday 
dragging a 30.2 inch trough across the lake. high pressure of at
least 30.6 inches over the canadian prairies on monday pushes ridging
of at least 30.4 inches over the upper great lakes early next week.



lsz162-220800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
408 pm edt wed oct 21 2026 /308 pm cdt wed oct 21 2026/

.late this afternoon...north winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...northeast winds less than 10 knots increasing to 5 to
15 knots after midnight, then diminishing to less than 10 knots
late. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. patchy fog. waves calm to
2 feet. 
.thursday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.friday...east winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots becoming south
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots. a chance of showers by
mid afternoon. waves building to 3 to 5 feet occasionally to
7 feet. 
.saturday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a chance of showers. waves
subsiding to 1 to 3 feet. 
.sunday...west winds 5 to 15 knots veering north. waves subsiding
to calm to 2 feet. 
.monday...northeast winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 212008 cca
glfls 
expires:202610220800;;956766

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt wed oct 21 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 weak 30.0 inch trough over the lake will move east tonight as 
another high pressure builds in from the west in its wake, becoming 
centered over northern ontario and the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low moves just north of lake 
winnipeg. the low then lifts northeast to hudson bay on sunday 
dragging a 30.2 inch trough across the lake. high pressure of at
least 30.6 inches over the canadian prairies on monday pushes ridging
of at least 30.4 inches over the upper great lakes early next week.



lsz263-220800-
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-
408 pm edt wed oct 21 2026

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northeast winds less than 10 knots increasing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.thursday...east winds less than 10 knots increasing to 5 to
15 knots in the afternoon. patchy fog. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots veering south late.
waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.friday night...south winds 10 to 20 knots. waves building to
2 to 4 feet. 
.saturday...south winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet. 
.saturday night...southwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. a chance of showers. waves
subsiding to 2 to 4 feet. 
.sunday...west winds 10 to 20 knots becoming north 5 to 15 knots.
waves subsiding to calm to 2 feet. 
.monday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 212008 cca
glfls 
expires:202610220800;;956767

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt wed oct 21 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 weak 30.0 inch trough over the lake will move east tonight as 
another high pressure builds in from the west in its wake, becoming 
centered over northern ontario and the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low moves just north of lake 
winnipeg. the low then lifts northeast to hudson bay on sunday 
dragging a 30.2 inch trough across the lake. high pressure of at
least 30.6 inches over the canadian prairies on monday pushes ridging
of at least 30.4 inches over the upper great lakes early next week.



lsz264-220800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
408 pm edt wed oct 21 2026

.late this afternoon...north winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...northeast winds less than 10 knots. waves calm to
2 feet. 
.thursday...east winds less than 10 knots veering southeast in
the afternoon, then increasing to 5 to 15 knots late. waves calm
to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
late. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves building to 1 to 3 feet. 
.friday night...south winds 10 to 20 knots. waves building to
2 to 4 feet. 
.saturday...south winds 20 to 30 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...southwest winds 15 to 25 knots veering west
after midnight. a chance of showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.sunday...west winds 10 to 20 knots becoming north 5 to 15 knots.
waves subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.monday...north winds 5 to 15 knots veering northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 212008 cca
glfls 
expires:202610220800;;956768

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt wed oct 21 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 weak 30.0 inch trough over the lake will move east tonight as 
another high pressure builds in from the west in its wake, becoming 
centered over northern ontario and the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low moves just north of lake 
winnipeg. the low then lifts northeast to hudson bay on sunday 
dragging a 30.2 inch trough across the lake. high pressure of at
least 30.6 inches over the canadian prairies on monday pushes ridging
of at least 30.4 inches over the upper great lakes early next week.



lsz265-220800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
408 pm edt wed oct 21 2026

.late this afternoon...north winds 5 to 15 knots. sprinkles.
waves calm to 2 feet. 
.tonight...north winds 5 to 15 knots veering northeast after
midnight. patchy fog after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots increasing to 10 to 20 knots
late. patchy fog through early afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight, then increasing to 10 to 20 knots
late. areas of dense fog through midnight. waves calm to 2 feet. 
.friday...south winds 10 to 20 knots backing southeast by mid
afternoon. waves building to 1 to 3 feet. 
.friday night...south winds 15 to 25 knots. waves building to
2 to 4 feet. 
.saturday...south winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.saturday night...south winds 20 to 30 knots veering southwest
after midnight. a chance of showers. waves subsiding to 1 to
3 feet. 
.sunday...west winds 15 to 25 knots veering north. waves building
to 2 to 4 feet, then subsiding to calm to 2 feet. 
.monday...north winds 15 to 25 knots becoming northeast 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 212008 cca
glfls 
expires:202610220800;;956769

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt wed oct 21 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 weak 30.0 inch trough over the lake will move east tonight as 
another high pressure builds in from the west in its wake, becoming 
centered over northern ontario and the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low moves just north of lake 
winnipeg. the low then lifts northeast to hudson bay on sunday 
dragging a 30.2 inch trough across the lake. high pressure of at
least 30.6 inches over the canadian prairies on monday pushes ridging
of at least 30.4 inches over the upper great lakes early next week.



lsz266-220800-
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-
408 pm edt wed oct 21 2026

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...north winds 5 to 15 knots veering northeast after
midnight. patchy fog after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. patchy fog. waves calm to
2 feet. 
.thursday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight, then increasing to 15 to 25 knots
late. patchy dense fog through midnight. waves building to 1 to
3 feet. 
.friday...south winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves 1 to 3 feet. 
.friday night...south winds 15 to 25 knots. waves building to
2 to 4 feet. 
.saturday...south winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.saturday night...south gales to 40 knots becoming southwest
20 to 30 knots after midnight. a chance of showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.sunday...west winds 15 to 25 knots veering north. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.monday...north winds 10 to 20 knots veering northeast. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 212008 cca
glfls 
expires:202610220800;;956770

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt wed oct 21 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 weak 30.0 inch trough over the lake will move east tonight as 
another high pressure builds in from the west in its wake, becoming 
centered over northern ontario and the upper great lakes by thursday 
morning. by friday afternoon, the high builds to 30.5 inches over 
the ontario/quebec line as a 29.4 inch low moves into eastern 
montana. saturday afternoon, the high builds further to 30.6 inches 
over new england as the 29.4 inch low moves just north of lake 
winnipeg. the low then lifts northeast to hudson bay on sunday 
dragging a 30.2 inch trough across the lake. high pressure of at
least 30.6 inches over the canadian prairies on monday pushes ridging
of at least 30.4 inches over the upper great lakes early next week.



lsz267-220800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
408 pm edt wed oct 21 2026

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...north winds 5 to 15 knots veering northeast after
midnight. patchy fog after midnight. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. patchy fog through early
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. waves calm to 2 feet. 
.friday...south winds 10 to 20 knots backing southeast by mid
afternoon. waves building to 1 to 3 feet. 
.friday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves 1 to 3 feet. 
.saturday...south winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...south winds 20 to 30 knots veering southwest
after midnight. a chance of showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.sunday...west winds 15 to 25 knots becoming north 10 to
20 knots. a chance of showers. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.monday...north winds 10 to 20 knots veering northeast. waves
subsiding to calm to 2 feet. 

$$