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(1/2)
Latest Great Lakes Marine Forecast by KMKX
Issued 4/28/2026 2:45 PM US/Central.
Valid through 4/28/2026 10:15 PM US/Central.
fzus63 kmkx 281945
glflm
expires:202604290315;;688253
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
245 pm cdt tue apr 28 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...
high pressure of 30.2 inches over the canadian prairies will
gradually shift southeastward into the western great lakes by the
end of the week. breezy westerly winds today will transition to
light (5-15 kt) northerly winds for tonight through the remainder
of the week as this high approaches. light showers will be
possible at times through the rest of the week as weak low
pressure areas roll through.
lmz261-362-364-366-563-565-567-868-290315-
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-
245 pm cdt tue apr 28 2026
sheboygan wi to pentwater mi north...
.tonight...northwest winds 15 to 25 kt diminishing to 10 to 20 kt
late this evening, then becoming north 10 to 15 kt overnight.
waves 2 to 4 ft subsiding to 1 to 2 ft.
.wednesday...north winds 5 to 10 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.
.wednesday night...north winds 10 to 15 kt becoming northwest
5 to 10 kt. waves 1 to 2 ft.
.thursday...northwest winds 10 to 15 kt becoming north 10 to
20 kt. waves 1 to 3 ft.
.thursday night...north winds 10 to 20 kt. waves 1 to 3 ft.
.friday...northwest winds 10 to 20 kt becoming north. waves 1 to
3 ft.
.friday night...northwest winds 10 to 20 kt. waves 1 to 3 ft.
.saturday...northwest winds 10 to 20 kt becoming west. waves 1 to
3 ft.
.sunday...west winds 10 to 20 kt. waves 1 to 3 ft.
$$
(2/2)
Latest Great Lakes Marine Forecast by KMKX
Issued 4/28/2026 2:45 PM US/Central.
Valid through 4/28/2026 10:15 PM US/Central.
fzus63 kmkx 281945
glflm
expires:202604290315;;688254
open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
245 pm cdt tue apr 28 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...
high pressure of 30.2 inches over the canadian prairies will
gradually shift southeastward into the western great lakes by the
end of the week. breezy westerly winds today will transition to
light (5-15 kt) northerly winds for tonight through the remainder
of the week as this high approaches. light showers will be
possible at times through the rest of the week as weak low
pressure areas roll through.
lmz080-669-671-673-675-777-779-870-872-874-876-878-290315-
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-
245 pm cdt tue apr 28 2026
sheboygan wi to pentwater mi south...
.tonight...southwest winds 10 to 15 kt veering to north. slight
chance of rain showers overnight. waves 1 to 3 ft.
.wednesday...north winds 10 to 15 kt increasing to 10 to 20 kt.
slight chance of rain showers. waves 2 to 4 ft.
.wednesday night...north winds 10 to 20 kt becoming northwest
5 to 10 kt from late evening on. waves 1 to 3 ft subsiding to
1 to 2 ft.
.thursday...northwest winds 10 to 15 kt becoming north 10 to
20 kt. waves 1 to 2 ft.
.thursday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft.
.friday...north winds 10 to 20 kt. waves 2 to 4 ft.
.friday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft.
.saturday...north winds 10 to 15 kt becoming northwest 10 to
20 kt. waves 1 to 3 ft.
.sunday...west winds 10 to 20 kt. waves 2 to 4 ft.
$$
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