869
FZUS63 KMKX 070217
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
917 PM CDT Sun Sep 6 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 around 30.1 inches over the northern Great Lakes
will slowly shift to the lower Great Lakes for Monday, with light
and variable winds expected. Increasing south to southwest winds
are expected Tuesday into Wednesday as low pressure around 29.5
inches lifts through the Canadian Prairies. Winds shift west, then
northwest Wednesday night into Thursday as a cold front moves
toward and through the region. Cannot rule out a few isolated
gales across far northern Lake Michigan on Wednesday. Winds then
become light and variable again Thursday under high pressure
before shifting to southwesterly on Friday.

LMZ261-362-364-366-563-565-567-868-070930-
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-
917 PM CDT Sun Sep 6 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...East winds 5 to 10 kt becoming south. Waves
1 ft or less.
.MONDAY...South winds 5 to 10 kt becoming southwest. Waves 1 to
2 ft.
.MONDAY NIGHT...Southeast winds 5 to 10 kt becoming south 10 to
20 kt. Waves 1 to 2 ft building to 2 to 4 ft.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Chance of
showers in the afternoon. Waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft.
.TUESDAY NIGHT...South winds to 30 kt becoming southwest. Showers
likely in the evening, then showers overnight. Waves 4 to 6 ft
occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 30 kt increasing to gales to
35 kt. Showers in the morning. Waves 4 to 7 ft occasionally to
9 ft.
.WEDNESDAY NIGHT...West gales to 35 kt becoming northwest to
30 kt. Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY...Northwest winds 15 to 25 kt. Waves 3 to 5 ft
subsiding to 2 to 4 ft.
.FRIDAY...Southwest winds 15 to 25 kt becoming south to 30 kt.
Waves 1 to 3 ft building to 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-070930-
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-
917 PM CDT Sun Sep 6 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds 10 to 15 kt becoming
southeast. Waves 1 to 3 ft.
.MONDAY...Southeast winds 5 to 10 kt becoming east. Waves 1 to
2 ft.
.MONDAY NIGHT...East winds 5 to 10 kt increasing to 10 to 15 kt
late in the evening, then becoming southeast 10 to 20 kt
overnight. Waves 1 to 2 ft building to 2 to 4 ft.
.TUESDAY...South winds 15 to 25 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.TUESDAY NIGHT...South winds 15 to 25 kt becoming southwest.
Chance of showers in the evening, then showers overnight. Waves
4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 30 kt. Showers likely in the
morning. Waves 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY NIGHT...West winds to 30 kt becoming northwest. Waves
4 to 6 ft occasionally to 8 ft.
.THURSDAY...Northwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming south 15 to 25 kt.
Waves 1 to 3 ft building to 3 to 5 ft.

$$

LMZ761-070930-
MAFOR 0704/
MICHIGAN NORTH 11300 14400 11500 11400 11300. Waves 1 foot or
less.

MICHIGAN SOUTH 12210 11300 11310 11300 12200 11210. Waves 2 feet
or less.

$$


WFO MKX

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

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