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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 221407
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
907 AM CDT Sun Mar 22 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

Low pressure around 29.5 inches will continue east across the southern Great Lakes region this morning. As this low pushes out, the pressure gradient strengthens as winds from the north become gusty. Gales have developed quickly this morning and have become more persistent across the southern third of the lake. Thus a Gale Warning has been issued through the evening for gusts from 35 to 40 kts, with a few isolated gusts to 45 kts possible.

High pressure around 30.4 inches will build into the Great Lakes Region from Canada tonight into Monday bringing decreasing winds with northerly gales falling off this evening. As this high exits Tuesday and a weak front passes, winds may pick up a bit from the south. Winds over the lake will remain largely from the south through Wednesday as broad low pressure approaches from the west. Chances for precipitation on Tuesday and again on Wednesday though primarily for northern parts of the lake.

LMZ261-362-364-366-563-565-567-868-222115
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
907 AM CDT Sun Mar 22 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

REST OF TODAY
North winds to 30 kt. Waves 6 to 9 ft occasionally to 12 ft.

TONIGHT
North winds to 30 kt diminishing to 10 to 20 kt. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft.

MONDAY
North winds 10 to 20 kt becoming west 10 to 15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.

MONDAY NIGHT
South winds 10 to 20 kt increasing to 15 to 25 kt. Waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft.

TUESDAY
Southwest winds 15 to 25 kt. Waves 4 to 6 ft occasionally to 8 ft.

TUESDAY NIGHT
East winds 10 to 15 kt becoming northeast 10 to 20 kt. Waves 2 to 4 ft.

WEDNESDAY
East winds 10 to 20 kt. Waves 3 to 5 ft.

THURSDAY
Southwest winds 10 to 20 kt veering to west 15 to 25 kt. Chance of rain and snow. Waves 4 to 7 ft occasionally to 9 ft.

LMZ080-671-673-675-777-779-872-874-876-878-222115
Lake Michigan from Michigan City IN to St. Joseph MI 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 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
907 AM CDT Sun Mar 22 2026

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

GALE WARNING IN EFFECT THROUGH LATE TONIGHT

REST OF TODAY
North gales to 40 kt. Slight chance of rain late this morning, then chance of sprinkles and slight chance of rain this afternoon. Waves 7 to 10 ft occasionally to 13 ft building to 8 to 12 ft occasionally to 16 ft.

TONIGHT
North gales to 35 kt diminishing to 15 to 25 kt. Waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft occasionally to 12 ft.

MONDAY
North winds 10 to 20 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 2 to 4 ft.

MONDAY NIGHT
East winds 10 to 15 kt veering to south 10 to 20 kt. Waves 2 to 4 ft.

TUESDAY
South winds 10 to 20 kt. Waves 2 to 4 ft.

TUESDAY NIGHT
South winds 10 to 15 kt. Waves 2 to 4 ft.

WEDNESDAY
Southeast winds 10 to 20 kt becoming east. Waves 3 to 5 ft.

THURSDAY
South winds 10 to 20 kt veering to northwest. Chance of rain. Waves 4 to 7 ft occasionally to 9 ft.

LMZ669-870-222115
Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore to Mid Lake
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid Lake
907 AM CDT Sun Mar 22 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH TO PORT WASHINGTON WI TO WHITEHALL MI...

REST OF TODAY
North winds to 30 kt increasing to gales to 35 kt. Chance of sprinkles and flurries late this morning, then chance of flurries this afternoon. Waves 7 to 10 ft occasionally to 13 ft.

TONIGHT
North winds to 30 kt diminishing to 10 to 20 kt. Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft occasionally to 9 ft.

MONDAY
North winds 10 to 20 kt becoming northeast 10 to 15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to 3 ft.

MONDAY NIGHT
Southeast winds 10 to 15 kt becoming south 10 to 20 kt. Waves 1 to 2 ft building to 2 to 4 ft.

TUESDAY
South winds 10 to 20 kt. Waves 3 to 5 ft.

TUESDAY NIGHT
South winds 10 to 15 kt becoming southeast. Waves 2 to 4 ft.

WEDNESDAY
East winds 10 to 20 kt. Waves 3 to 5 ft.

THURSDAY
South winds 10 to 20 kt veering to northwest 15 to 25 kt. Chance of rain. Waves 4 to 7 ft occasionally to 9 ft.

LMZ761-222115
MAFOR 2216/ MICHIGAN NORTH 13840 12830 12820 11710. Waves 5 to 9 feet this afternoon. Waves 5 to 8 feet subsiding to 3 to 6 feet tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet Monday morning.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...14850 11850 11830 12820. Waves 6 to 9 feet building to 8 to 11 feet this afternoon. Waves 7 to 11 feet subsiding to 5 to 8 feet tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet Monday morning.

Kuroski

Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable

Graphical marine forecasts are available online at: weather.gov/greatlakes