fzus61 kcle 200737
glfle 
expires:202608201415;;037171

open lake forecast for lake erie
national weather service cleveland oh
337 am edt thu aug 20 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure 30.10 inches builds into the region through friday.
low pressure 29.90 inches moves into the great lakes region on 
saturday with a cold front crossing late saturday night into 
sunday.


lez162>164-201415-
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-
337 am edt thu aug 20 2026

.today...northeast winds 5 to 15 knots. a chance of showers with
a slight chance of thunderstorms this morning. a slight chance of
showers late. waves 1 to 3 feet. 
.tonight...east winds 5 to 15 knots. waves 1 to 3 feet subsiding
to 1 foot or less. 
.friday...east winds 10 knots or less. waves 1 foot or less. 
.friday night...east winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.saturday...southwest winds 5 to 15 knots becoming northwest.
showers with a chance of thunderstorms during the day, then a
chance of showers saturday night. waves 2 feet or less. 
.sunday...northwest winds 10 to 15 knots. waves 1 to 2 feet. 
.monday...northwest winds 5 to 10 knots becoming west. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 200733
glfsc 
expires:202608201545;;036944

lake st clair forecast
national weather service detroit/pontiac mi
333 am edt thu aug 20 2026

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

.synopsis...high pressure, 30.00 inches, builds into the great
lakes through the end of the work week maintaining light winds. a
cold front then sweeps across the area friday into saturday,
bringing the next opportunity for showers and thunderstorms.


lcz460-201545-
lake st clair-
333 am edt thu aug 20 2026

.today...northeast winds 10 to 15 knots diminishing to 5 to 10 knots
in the afternoon. cloudy early in the morning becoming mostly sunny.
waves 2 feet or less.
.tonight...northeast winds 10 to 15 knots becoming east 5 to 10
knots after midnight. clear. waves 2 feet or less.
.friday...southeast winds 5 to 10 knots. mostly sunny. waves 2 feet
or less.
.friday night...southeast winds 5 to 10 knots. mostly clear. waves 2
feet or less.
.saturday...southwest winds 5 to 10 knots becoming northwest 10 to
15 knots in the evening. mostly sunny with a chance of light showers
in the morning...then light showers and a chance of thunderstorms in
the afternoon and evening. waves 2 feet or less.
.sunday...north winds 10 to 20 knots. mostly clear. waves 2 feet 
or less.
.monday...northeast winds 10 to 15 knots. clear. waves 2 feet or
less.

$$

fzus63 kdtx 200733
glflh 
expires:202608201545;;037004

open lake forecast for lake huron
national weather service detroit/pontiac mi
333 am edt thu aug 20 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.00 inches, builds into the great
lakes through the end of the work week maintaining light winds. a
cold front then sweeps across the area friday into saturday,
bringing the next opportunity for showers and thunderstorms.


lhz462>464-201545-
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-
333 am edt thu aug 20 2026

.today...light and variable winds becoming north 5 to 10 knots.
waves 2 feet or less. 
.tonight...northeast winds 5 to 10 knots veering to the east
early in the morning. waves 2 feet or less. 
.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...south winds 5 to 10 knots veering to the northwest
late in the afternoon...then increasing to 15 to 20 knots late in
the evening. a chance of showers in the morning...then showers
and a chance of thunderstorms late in the morning. a chance of
showers late in the evening. waves 1 to 3 feet building to 4 to
6 feet late in the evening. waves occasionally around 8 feet. 
.sunday...northwest winds 15 to 20 knots. gusts to 30 knots until
early evening. a chance of showers. a chance of thunderstorms
early in the evening. waves 5 to 7 feet. waves occasionally
around 10 feet. 
.monday...northwest winds 10 to 15 knots becoming north 5 to
10 knots . waves 3 to 5 feet subsiding to 1 to 3 feet by
midnight. 


$$

fzus63 kmkx 200759
glflm 
expires:202608201515;;037741

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt thu aug 20 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

light to modest winds are expected today as high pressure around 
30.0 inches tracks through the western great lakes region. as the 
high pressure exits to the southeast later tonight, south to 
southwest winds will develop. theses southwesterly winds will 
increase for friday along with thunderstorm chances as low 
pressure around 29.8 inches moves across the region and drags a 
cold front through lake michigan. gusty winds will then shift to 
the northwest later friday night into saturday after the front 
exits. then another high pressure around 30.2 inches is progged to
build into the region later this weekend and help maintain gusty 
northerly winds.


lmz261-362-364-366-563-565-567-868-201515-
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-
259 am cdt thu aug 20 2026

sheboygan wi to pentwater mi north...

.today...southeast winds 5 to 10 kt becoming south. waves 1 to
2 ft. 
.tonight...south winds 10 to 15 kt increasing to 10 to 20 kt.
slight chance of showers overnight. waves 1 to 3 ft. 
.friday...south winds 10 to 20 kt increasing to 15 to 25 kt.
chance of showers. waves 3 to 5 ft. 
.friday night...southwest winds 10 to 20 kt veering to northwest.
chance of showers. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.saturday...northwest winds 10 to 20 kt increasing to 30 kt in
the afternoon. waves 2 to 4 ft. 
.saturday night...north winds to 30 kt diminishing to 15 to
25 kt. waves 3 to 5 ft. 
.sunday...northwest winds to 30 kt becoming north gales to 35 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.monday...northwest winds 10 to 20 kt backing to southwest. waves
1 to 2 ft.  

$$

fzus63 kmkx 200759
glflm 
expires:202608201515;;037742

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt thu aug 20 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

light to modest winds are expected today as high pressure around 
30.0 inches tracks through the western great lakes region. as the 
high pressure exits to the southeast later tonight, south to 
southwest winds will develop. theses southwesterly winds will 
increase for friday along with thunderstorm chances as low 
pressure around 29.8 inches moves across the region and drags a 
cold front through lake michigan. gusty winds will then shift to 
the northwest later friday night into saturday after the front 
exits. then another high pressure around 30.2 inches is progged to
build into the region later this weekend and help maintain gusty 
northerly winds.


lmz080-669-671-673-675-777-779-870-872-874-876-878-201515-
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-
259 am cdt thu aug 20 2026

sheboygan wi to pentwater mi south...

.today...northeast winds 5 to 10 kt backing to northwest. waves
1 to 2 ft. 
.tonight...northwest winds 10 to 15 kt backing to south. waves
1 to 2 ft. 
.friday...south winds 10 to 20 kt. waves 2 to 4 ft. 
.friday night...southwest winds 10 to 20 kt becoming west. chance
of showers. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.saturday...northwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...north winds 10 to 20 kt. waves 3 to 5 ft. 
.sunday...north winds 15 to 25 kt increasing to 30 kt. waves 4 to
7 ft occasionally to 9 ft. 
.monday...north winds 10 to 15 kt becoming northeast 10 to 20 kt.
waves 1 to 2 ft.  

$$