299
FZUS63 KMKX 291346
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
846 AM CDT Wed Jul 29 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...

The ongoing light northerly winds will transition to light and
variable in a north to south manner as high pressure around 30.0
inches builds into the Great Lakes region. The centroid of this
high should slowly shift southeast of Lake Michigan on Thursday,
allowing for light southerly winds Thursday and Thursday night.

Low pressure develops near Nebraska / the Dakotas late Thursday,
deepening to around 29.6 inches before crossing Illinois Saturday
morning. Light south winds turn southeast and accelerate over the
southern half of the lake Friday, backing northeast with gusts up
to 20 KT Saturday morning, then north-northeast with gusts to 25
KT Saturday afternoon and evening. An additional period of 25-30
KT north winds Sunday afternoon and evening as high pressure
builds over Lake Superior. Slower winds and gusts expected over
the north half of Lake Michigan through the aforementioned
timeframes.

LMZ261-362-364-366-563-565-567-868-292130-
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-
846 AM CDT Wed Jul 29 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...North winds 5 to 10 kt backing to southwest
10 to 15 kt. Waves 1 to 2 ft.
.TONIGHT...Southwest winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 1 ft or less.
.THURSDAY...South winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest
10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of showers in the afternoon. Waves 1 to 3 ft.
.FRIDAY NIGHT...Southwest winds 10 to 15 kt veering to northeast.
Showers likely. Waves 1 to 3 ft.
.SATURDAY...Northeast winds 10 to 15 kt becoming north 10 to
20 kt. Chance of showers. Waves 1 to 3 ft.
.SUNDAY...Northeast winds 10 to 20 kt increasing to 30 kt. Waves
3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-292130-
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-
846 AM CDT Wed Jul 29 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...North winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 3 ft.
.TONIGHT...North winds 10 to 20 kt becoming northwest 5 to 10 kt.
Waves 1 to 3 ft subsiding to 1 ft or less.
.THURSDAY...Northwest winds 5 to 10 kt backing to southwest late
in the morning, then becoming south early in the afternoon
becoming 10 to 20 kt late. Waves 1 to 2 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest
10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY NIGHT...East winds 10 to 20 kt. Showers likely. Waves
2 to 4 ft building to 3 to 5 ft.
.SATURDAY...East winds 10 to 20 kt becoming northeast 15 to
25 kt. Chance of showers. Waves 3 to 5 ft.
.SUNDAY...Northeast winds 15 to 25 kt becoming north to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-292130-
MAFOR 2916/
MICHIGAN NORTH 11710 12510 13500 12400. Waves 1 foot or less.

MICHIGAN SOUTH 11810 13820 11800 12700 11600. Waves 2 feet or
less.

$$


Sheppard

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

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