fzus63 kdtx 191338
glfsc 
expires:202608192145;;993156

lake st clair forecast
national weather service detroit/pontiac mi
938 am edt wed aug 19 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 in tonight and
thursday providing light winds. showers and thunderstorm chances
increase friday evening and especially saturday ahead of the next
cold front.


lcz460-192145-
lake st clair-
938 am edt wed aug 19 2026

.rest of today...northwest winds 5 to 10 knots veering to the
northeast late in the afternoon. partly sunny. waves 2 feet or less.
.tonight...northeast winds 5 to 10 knots. partly cloudy. waves 2
feet or less.
.thursday...northeast winds 5 to 10 knots. partly sunny. waves 2
feet or less.
.thursday night...east winds 5 to 10 knots. clear. waves 2 feet or
less.
.friday...southeast winds 5 to 10 knots increasing to 10 to 15 knots
in the afternoon and evening. mostly clear. waves 2 feet or less.
.saturday...northwest winds 5 to 10 knots. partly cloudy. showers
likely and a chance of thunderstorms. waves 2 feet or less.
.sunday...north winds 10 to 15 knots. mostly clear. waves 2 feet or
less.

$$

fzus63 kdtx 191337
glflh 
expires:202608192145;;993122

open lake forecast for lake huron
national weather service detroit/pontiac mi
937 am edt wed aug 19 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 in tonight and
thursday providing light winds. showers and thunderstorm chances
increase friday evening and especially saturday ahead of the next
cold front.


lhz462>464-192145-
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-
937 am edt wed aug 19 2026

.rest of today...northwest winds 10 to 15 knots becoming north
5 to 10 knots in the afternoon. waves 1 to 3 feet. 
.tonight...light and variable winds. waves 2 feet or less. 
.thursday...light and variable winds becoming north 5 to 10 knots
early in the afternoon. waves 2 feet or less. 
.thursday night...north winds 5 to 10 knots veering to the
southeast after midnight. waves 2 feet or less. 
.friday...southeast winds 5 to 10 knots increasing to 10 to
15 knots. a chance of showers late in the evening. waves 1 to
3 feet. 
.saturday...south winds 5 to 10 knots veering to the southwest in
the late morning and early afternoon...then veering to the west
early in the evening becoming northwest 10 to 15 knots by
midnight. showers likely early in the morning. a chance of
thunderstorms. a chance of showers . waves 1 to 3 feet building
to 3 to 5 feet by midnight. 
.sunday...northwest winds 15 to 20 knots decreasing to 10 to
15 knots by midnight. a chance of showers. waves 4 to 6 feet.
waves occasionally around 8 feet. 


$$

fzus63 kmkx 191402
glflm 
expires:202608192130;;993698

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
902 am cdt wed aug 19 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 cold front will shift south of lake michigan by early this 
afternoon. behind the front, expect mainly light to modest winds
this afternoon into thursday, as high pressure around 30.0 inches
tracks through the western great lakes region. as the high exits
to the east later thursday into thursday night, south to 
southwest winds will develop. gusty southwest winds and 
thunderstorm chances return later friday, as low pressure around 
29.8 inches moves across the region and drags a cold front 
through. gusty winds will shift to the west friday night and 
northwest on saturday behind the front.


lmz261-362-364-366-563-565-567-868-192130-
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-
902 am cdt wed aug 19 2026

sheboygan wi to pentwater mi north...

.rest of today...northwest winds 5 to 10 kt increasing to 10 to
15 kt late this morning, then increasing to 10 to 20 kt early
this afternoon becoming southwest late. waves 1 to 2 ft. 
.tonight...east winds 10 to 15 kt becoming southeast. waves 1 to
2 ft subsiding to nearly calm. 
.thursday...south winds 5 to 10 kt becoming southwest 10 to 20 kt
early in the afternoon, then becoming south late. waves 1 to 2 ft
building to 1 to 3 ft. 
.thursday night...south winds 10 to 20 kt. waves 2 to 4 ft. 
.friday...southwest winds 15 to 25 kt increasing to 30 kt.
showers likely in the morning, then chance of showers in the
afternoon. waves 3 to 5 ft. 
.friday night...southwest winds 15 to 25 kt veering to northwest
10 to 20 kt. chance of showers. waves 3 to 5 ft subsiding to 2 to
4 ft. 
.saturday...northwest winds 15 to 25 kt becoming north to 30 kt.
waves 1 to 3 ft. 
.sunday...northwest winds to 30 kt becoming north gales to 35 kt.
waves 3 to 5 ft.  

$$

fzus63 kmkx 191402
glflm 
expires:202608192130;;993699

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
902 am cdt wed aug 19 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 cold front will shift south of lake michigan by early this 
afternoon. behind the front, expect mainly light to modest winds
this afternoon into thursday, as high pressure around 30.0 inches
tracks through the western great lakes region. as the high exits
to the east later thursday into thursday night, south to 
southwest winds will develop. gusty southwest winds and 
thunderstorm chances return later friday, as low pressure around 
29.8 inches moves across the region and drags a cold front 
through. gusty winds will shift to the west friday night and 
northwest on saturday behind the front.


lmz080-669-671-673-675-777-779-870-872-874-876-878-192130-
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-
902 am cdt wed aug 19 2026

sheboygan wi to pentwater mi south...

.rest of today...north winds 5 to 10 kt increasing to 10 to
15 kt. waves 1 to 3 ft. 
.tonight...northeast winds 10 to 15 kt diminishing to 5 to 10 kt.
waves 1 to 2 ft. 
.thursday...northeast winds 5 to 10 kt becoming east late in the
morning, then veering to south early in the afternoon becoming
10 to 20 kt late. waves 1 to 3 ft. 
.thursday night...south winds 10 to 20 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt becoming south to 30 kt in
the afternoon. chance of showers. waves 3 to 5 ft. 
.friday night...southwest winds 15 to 25 kt becoming west 10 to
20 kt. chance of showers. waves 3 to 5 ft. 
.saturday...northwest winds 15 to 25 kt becoming north to 30 kt.
waves 2 to 4 ft. 
.sunday...north winds 15 to 25 kt increasing to 30 kt. waves 4 to
6 ft occasionally to 8 ft.  

$$