FZUS53 KAPX 210721
NSHAPX

Nearshore Marine Forecast
National Weather Service Gaylord MI
321 AM EDT Thu May 21 2026

For waters within five nautical miles of shore on Lakes Huron...
Michigan and Superior.

Waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. Occasional wave height is the average of
the highest 1/10 of the wave spectrum.

LSZ321-211530-
Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI-
321 AM EDT Thu May 21 2026

.TODAY...Light winds. Mostly clear. Waves 2 feet or less.
.TONIGHT...Light winds. Partly cloudy. Waves 2 feet or less.
.FRIDAY...Southeast wind 10 to 15 knots. Mostly sunny. Waves
2 feet or less.
.FRIDAY NIGHT...Southeast wind 15 to 20 knots. Mostly cloudy.
Waves 2 to 4 feet.

See the open lakes forecast for days 3 through 5.

$$

LSZ322-211530-
St. Marys River Point Iroquois to E. Potagannissing Bay-
321 AM EDT Thu May 21 2026

.TODAY...Light winds. Sunny early in the morning then becoming
mostly sunny.
.TONIGHT...Light winds. Partly cloudy.
.FRIDAY...East wind 10 to 15 knots. Mostly sunny.
.FRIDAY NIGHT...East wind 15 to 20 knots. Mostly cloudy.

See the open lakes forecast for days 3 through 5.

$$

LMZ341-211530-
Seul Choix Point to 5NM West of Mackinac Bridge-
321 AM EDT Thu May 21 2026

.TODAY...East wind 5 to 10 knots. Sunny early in the morning then
becoming mostly sunny. Waves 2 feet or less.
.TONIGHT...East wind 5 to 10 knots. Partly cloudy. Waves 2 feet
or less.
.FRIDAY...East wind 15 to 20 knots. Partly sunny. Waves 2 to
4 feet.
.FRIDAY NIGHT...East wind 15 to 25 knots. Chance of showers.
Waves 4 to 6 feet.

See the open lakes forecast for days 3 through 5.

$$

LMZ342-211530-
Norwood MI to 5NM West of Mackinac Bridge including Little
Traverse Bay-
321 AM EDT Thu May 21 2026

.TODAY...East wind 5 to 10 knots. Sunny early in the morning then
becoming partly sunny. Waves 2 feet or less.
.TONIGHT...East wind 5 to 10 knots. Partly cloudy. Waves 2 feet
or less.
.FRIDAY...East wind 15 to 20 knots. Partly sunny. Waves 2 to
3 feet.
.FRIDAY NIGHT...East wind 15 to 25 knots. Chance of showers.
Waves 3 to 5 feet.

See the open lakes forecast for days 3 through 5.

$$

LMZ323-211530-
Grand Traverse Bay south of a line Grand Traverse Light to
Norwood MI-
321 AM EDT Thu May 21 2026

.TODAY...East wind 5 to 10 knots becoming northeast in the
afternoon. Sunny early in the morning then becoming partly sunny.
Waves 2 feet or less.
.TONIGHT...East wind 5 to 10 knots. Partly cloudy. Waves 2 feet
or less.
.FRIDAY...East wind 10 to 15 knots. Partly sunny. Waves 2 feet or
less.
.FRIDAY NIGHT...East wind 10 to 15 knots. Chance of showers.
Waves 2 to 3 feet.

See the open lakes forecast for days 3 through 5.

$$

LMZ344-345-211530-
Sleeping Bear Point to Grand Traverse Light MI-
Point Betsie to Sleeping Bear Point MI-
321 AM EDT Thu May 21 2026

.TODAY...Northeast wind 5 to 10 knots. Mostly sunny early in the
morning then becoming partly sunny. Waves 2 feet or less.
.TONIGHT...East wind 5 to 10 knots. Mostly cloudy. Waves 2 feet
or less.
.FRIDAY...East wind 10 to 15 knots. Partly sunny. Waves 2 feet or
less.
.FRIDAY NIGHT...East wind 10 to 15 knots. Chance of showers.
Waves 2 to 3 feet.

See the open lakes forecast for days 3 through 5.

$$

LMZ346-211530-
Manistee to Point Betsie MI-
321 AM EDT Thu May 21 2026

.TODAY...Northeast wind 10 to 15 knots. Mostly sunny early in the
morning then becoming mostly cloudy. Waves 2 feet or less.
.TONIGHT...East wind 5 to 10 knots. Mostly cloudy. Waves 2 feet
or less.
.FRIDAY...East wind 10 to 15 knots. Partly sunny. Waves 2 feet or
less.
.FRIDAY NIGHT...East wind 10 to 15 knots. Rain showers likely.
Waves 2 feet or less.

See the open lakes forecast for days 3 through 5.

$$

LHZ345-211530-
Straits of Mackinac within 5 nm of Mackinac Bridge including
Mackinac Island-
321 AM EDT Thu May 21 2026

.TODAY...East wind 5 to 10 knots. Sunny early in the morning then
becoming mostly sunny. Waves 2 feet or less.
.TONIGHT...East wind 5 to 10 knots. Partly cloudy. Waves 2 feet
or less.
.FRIDAY...East wind 15 to 20 knots. Mostly sunny. Waves 2 to
4 feet.
.FRIDAY NIGHT...East wind 15 to 25 knots. Chance of showers.
Waves 5 to 8 feet.

See the open lakes forecast for days 3 through 5.

$$

LHZ346-211530-
St Ignace to False Detour Channel-
321 AM EDT Thu May 21 2026

.TODAY...East wind 5 to 10 knots. Sunny early in the morning then
becoming mostly sunny. Waves 2 feet or less.
.TONIGHT...East wind 5 to 10 knots. Partly cloudy. Waves 2 feet
or less.
.FRIDAY...East wind 15 to 20 knots. Partly sunny. Waves 2 to
4 feet.
.FRIDAY NIGHT...East wind 15 to 25 knots. Mostly cloudy. Waves
6 to 9 feet.

See the open lakes forecast for days 3 through 5.

$$

LHZ347-211530-
5NM East of Mackinac Bridge to Presque Isle Light MI including
Bois Blanc Island-
321 AM EDT Thu May 21 2026

.TODAY...East wind 5 to 10 knots. Sunny early in the morning then
becoming partly sunny. Waves 2 feet or less.
.TONIGHT...East wind 5 to 10 knots. Partly cloudy. Waves 2 feet
or less.
.FRIDAY...East wind 15 to 20 knots. Partly sunny. Waves 2 to
4 feet.
.FRIDAY NIGHT...East wind 15 to 25 knots. Chance of showers.
Waves 7 to 10 feet.

See the open lakes forecast for days 3 through 5.

$$

LHZ348-211530-
Presque Isle Light to Sturgeon Pt MI Including Thunder Bay
National Marine Sanctuary-
321 AM EDT Thu May 21 2026

.TODAY...East wind 10 to 15 knots early in the morning becoming
variable 10 knots or less. Sunny early in the morning then
becoming mostly sunny. Waves 2 feet or less.
.TONIGHT...Northeast wind 10 to 15 knots. Partly cloudy. Waves
2 feet or less.
.FRIDAY...East wind 10 to 15 knots. Partly sunny. Waves 2 to
4 feet.
.FRIDAY NIGHT...East wind 15 to 25 knots. Chance of showers.
Waves 5 to 8 feet.

See the open lakes forecast for days 3 through 5.

$$

LHZ349-211530-
Sturgeon Pt to Alabaster MI-
321 AM EDT Thu May 21 2026

.TODAY...Northeast wind 10 to 20 knots. Sunny early in the
morning then becoming partly sunny. Waves 2 to 3 feet.
.TONIGHT...Northeast wind 10 to 15 knots. Partly cloudy. Waves
2 feet or less.
.FRIDAY...East wind 10 to 20 knots. Partly sunny. Waves 2 to
4 feet.
.FRIDAY NIGHT...East wind 15 to 25 knots. Chance of showers.
Waves 4 to 6 feet.

See the open lakes forecast for days 3 through 5.

$$

SJC