054
FZUS63 KMKX 100206
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
906 PM CDT Sun Aug 9 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...

Winds will become light and mostly variable ahead of a sagging
front. The front will move southward down the lake into Monday,
leading to light northerly winds through the morning on Monday and
light and variable winds Monday afternoon and evening. Light and
variable winds then persist into Tuesday as high pressure around
30.0 inches remains in place north of a frontal boundary parked
over the Corn Belt. Otherwise an unsettled weather pattern has set
up over the Upper Great Lakes for the start of this week where
weak waves of low pressure will cross the region and produce
rounds of thunderstorms at times primarily a risk for the south
half.

LMZ261-362-364-366-563-565-567-868-100915-
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-
906 PM CDT Sun Aug 9 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southwest winds 10 to 15 kt becoming west 5 to
10 kt. Patchy fog overnight. Slight chance of showers and
thunderstorms overnight. Waves 1 to 3 ft.
.MONDAY...Northwest winds 10 to 15 kt backing to south. Patchy
fog in the morning. Waves 1 to 2 ft.
.MONDAY NIGHT...South winds 10 to 15 kt becoming southeast. Waves
1 to 2 ft.
.TUESDAY...South winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 ft or less.
.TUESDAY NIGHT...North winds 5 to 10 kt. Chance of showers
overnight. Waves 1 ft or less.
.WEDNESDAY...Northwest winds 5 to 10 kt becoming north 10 to
20 kt in the afternoon. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...North winds 10 to 15 kt. Waves 1 to 2 ft.
.THURSDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 1 to 2 ft.
.FRIDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-100915-
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-
906 PM CDT Sun Aug 9 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds 15 to 25 kt becoming southwest
10 to 20 kt. Chance of showers and thunderstorms. Patchy fog
overnight. Waves 1 to 3 ft.
.MONDAY...Northwest winds 10 to 15 kt veering to northeast.
Patchy fog in the morning. Slight chance of showers and
thunderstorms in the afternoon. Waves 1 to 3 ft subsiding to 1 to
2 ft.
.MONDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 ft or less.
.TUESDAY...Southeast winds 10 to 15 kt. Chance of showers. Waves
1 to 2 ft.
.TUESDAY NIGHT...Northeast winds 5 to 10 kt. Chance of showers.
Waves 1 ft or less.
.WEDNESDAY...North winds 5 to 10 kt becoming northwest 10 to
15 kt. Chance of showers in the morning. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...North winds 10 to 15 kt. Waves 1 to 2 ft.
.THURSDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 1 to 3 ft.
.FRIDAY...Northeast winds 10 to 15 kt becoming north 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ761-100915-
MAFOR 1004/
MICHIGAN NORTH 11510 11500 11710 11800 11810 11710 11410 11400.
Waves 2 feet or less.

MICHIGAN SOUTH 11436 11520 11610 11710 11800 12100 11200. A
chance of thunderstorms overnight. Waves 1 to 3 feet overnight.
Waves 2 feet or less Monday and Monday evening.

$$


Wagner

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

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