706
FZUS63 KMKX 230810
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
310 AM CDT Fri Oct 23 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...
Dense fog will continue this morning over much of Lake Michigan
with the exception of the far south. Areas of fog may persist this
afternoon and tonight as well. Otherwise, high pressure around
30.3 inches will gradually shift eastward through today, while
strengthening to around 30.5 inches over southern Quebec. Light
and variable winds this morning will become light southerly late
this morning and afternoon, then become breezy southerly winds
over northern and central Lake Michigan by Saturday afternoon.
Modest southwest winds will then develop on Sunday ahead of a slow
moving Canadian cold front. The front will shift the winds to
northerly from late Sunday afternoon through the night as it moves
southward. Modest northeast winds will then prevail Monday and
Monday night.

LMZ261-362-364-366-563-565-567-868-231515-
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-
310 AM CDT Fri Oct 23 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

.TODAY...South winds 10 to 15 kt. Patchy dense fog this morning.
Waves 1 to 2 ft.
.TONIGHT...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...South winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft.
.SUNDAY...Southwest winds 15 to 25 kt becoming west 10 to 20 kt.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SUNDAY NIGHT...North winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.MONDAY...North winds 10 to 20 kt. Waves 3 to 5 ft.
.TUESDAY...East winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 2 to 4 ft.

$$

LMZ669-671-673-675-777-870-872-874-876-878-231515-
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 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-
310 AM CDT Fri Oct 23 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH TO WILMETTE HARBOR IL TO ST.
JOSEPH MI...

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

.TODAY...Southeast winds 10 to 15 kt. Patchy dense fog this
morning. Waves 1 to 2 ft.
.TONIGHT...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...South winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.SUNDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY NIGHT...Southwest winds 5 to 10 kt veering to north 10 to
20 kt. Waves 1 to 3 ft.
.MONDAY...Northeast winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.TUESDAY...East winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ080-779-231515-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM
offshore to Mid Lake-
310 AM CDT Fri Oct 23 2026

WILMETTE HARBOR IL TO ST. JOSEPH MI SOUTH...

.TODAY...Southeast winds 5 to 10 kt becoming east. Waves 1 ft or
less.
.TONIGHT...East winds 5 to 10 kt becoming southeast 10 to 15 kt.
Waves 1 to 2 ft.
.SATURDAY...South winds 10 to 15 kt becoming southeast 5 to
10 kt. Waves 1 to 2 ft.
.SATURDAY NIGHT...Southeast winds 10 to 15 kt becoming south.
Waves 1 to 2 ft.
.SUNDAY...South winds 5 to 10 kt. Waves 1 to 2 ft.
.SUNDAY NIGHT...South winds less than 10 kt becoming southwest.
Waves nearly calm.
.MONDAY...North winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 to 2 ft building to 2 to 4 ft.
.TUESDAY...East winds 10 to 15 kt. Waves 3 to 5 ft subsiding to
1 to 3 ft.

$$

LMZ761-231515-
MAFOR 2310/
MICHIGAN NORTH 12414 15410. Waves 2 feet or less.

MICHIGAN SOUTH 12314 15310. Waves 2 feet or less.

$$


Gehring

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

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