439
FZUS53 KAPX 201802
NSHAPX

Nearshore Marine Forecast
National Weather Service Gaylord MI
202 PM EDT Thu Aug 20 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.

LSZ321-210215-
Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI-
202 PM EDT Thu Aug 20 2026

.TONIGHT...Southeast wind 10 to 15 knots. Slight chance of
showers early in the evening, then chance of showers after
midnight. Waves 2 feet or less.
.FRIDAY...South wind 10 to 15 knots. Chance of showers and slight
chance of thunderstorms. Waves 2 feet or less.
.FRIDAY NIGHT...Southwest wind 5 to 10 knots. Rain showers
likely. Waves 2 feet or less.
.SATURDAY...Northwest wind 10 to 15 knots. Partly sunny. Waves
2 to 4 feet.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LSZ322-210215-
St. Marys River Point Iroquois to E. Potagannissing Bay-
202 PM EDT Thu Aug 20 2026

.TONIGHT...Southeast wind 10 to 15 knots. Slight chance of
showers after midnight.
.FRIDAY...South wind 5 to 10 knots. Chance of showers and slight
chance of thunderstorms.
.FRIDAY NIGHT...South wind 5 to 10 knots. Chance of showers.
.SATURDAY...Northwest wind 10 to 15 knots. Chance of showers.

Winds higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LMZ341-210215-
Seul Choix Point to 5NM West of Mackinac Bridge-
202 PM EDT Thu Aug 20 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY MORNING THROUGH
FRIDAY EVENING...

.TONIGHT...Southeast wind 10 to 15 knots becoming south early in
the morning. Chance of showers after midnight. Waves 2 to 3 feet.
.FRIDAY...South wind 10 to 15 knots. Gusts to 25 knots. Chance of
showers and slight chance of thunderstorms. Waves 2 to 4 feet.
.FRIDAY NIGHT...West wind 5 to 10 knots. Rain showers likely.
Waves 2 to 3 feet.
.SATURDAY...Northwest wind 10 to 15 knots. Mostly sunny. Waves
2 feet or less.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LMZ342-210215-
Norwood MI to 5NM West of Mackinac Bridge including Little
Traverse Bay-
202 PM EDT Thu Aug 20 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY MORNING THROUGH
FRIDAY EVENING...

.TONIGHT...Southeast wind 5 to 10 knots becoming south 10 to
15 knots after midnight. Slight chance of showers after midnight.
Waves 2 feet or less.
.FRIDAY...Southwest wind 10 to 15 knots. Gusts to 25 knots. Chance
of showers and slight chance of thunderstorms. Waves 2 feet or
less.
.FRIDAY NIGHT...Southwest wind 5 to 10 knots. Rain showers
likely. Waves 2 feet or less.
.SATURDAY...Northwest wind 15 to 20 knots. Chance of showers.
Waves 2 to 3 feet.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LMZ323-210215-
Grand Traverse Bay south of a line Grand Traverse Light to
Norwood MI-
202 PM EDT Thu Aug 20 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY MORNING THROUGH
FRIDAY EVENING...

.TONIGHT...South wind 10 to 15 knots. Partly cloudy early in the
evening then becoming mostly cloudy. Waves 2 feet or less.
.FRIDAY...South wind 5 to 10 knots with gusts to around 25 knots.
Chance of showers and slight chance of thunderstorms. Waves
2 feet or less.
.FRIDAY NIGHT...Southwest wind 5 to 10 knots. Chance of showers.
Waves 2 feet or less.
.SATURDAY...Northwest wind 15 to 20 knots. Chance of showers.
Waves 2 to 3 feet.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LMZ344-345-210215-
Sleeping Bear Point to Grand Traverse Light MI-
Point Betsie to Sleeping Bear Point MI-
202 PM EDT Thu Aug 20 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY MORNING THROUGH
FRIDAY EVENING...

.TONIGHT...South wind 10 to 15 knots. Partly cloudy early in the
evening then becoming mostly cloudy. Waves 2 feet or less.
.FRIDAY...Southwest wind 10 to 15 knots. Gusts to 25 knots. Chance
of showers and slight chance of thunderstorms. Waves 2 to 3 feet.
.FRIDAY NIGHT...Southwest wind 10 to 15 knots. Showers likely.
Waves 2 to 3 feet.
.SATURDAY...Northwest wind 15 to 20 knots. Chance of showers.
Waves 2 to 3 feet.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LMZ346-210215-
Manistee to Point Betsie MI-
202 PM EDT Thu Aug 20 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY MORNING THROUGH
FRIDAY EVENING...

.TONIGHT...South wind 10 to 15 knots. Partly cloudy early in the
evening then becoming mostly cloudy. Waves 2 feet or less.
.FRIDAY...South wind 10 to 15 knots with gusts to around 25 knots.
Chance of showers and slight chance of thunderstorms. Waves 2 to
3 feet.
.FRIDAY NIGHT...Southwest wind 10 to 15 knots. Showers likely and
a chance of thunderstorms. Waves 2 to 3 feet.
.SATURDAY...North wind 10 to 15 knots. Mostly sunny. Waves 2 feet
or less.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LHZ345-210215-
Straits of Mackinac within 5 nm of Mackinac Bridge including
Mackinac Island-
202 PM EDT Thu Aug 20 2026

.TONIGHT...South wind 10 to 15 knots. Slight chance of showers
after midnight. Waves 2 feet or less.
.FRIDAY...South wind 5 to 10 knots. Chance of showers and slight
chance of thunderstorms. Waves 2 feet or less.
.FRIDAY NIGHT...South wind 5 to 10 knots. Showers likely. Waves
2 feet or less.
.SATURDAY...Northwest wind 10 to 15 knots. Chance of showers.
Waves 2 feet or less.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LHZ346-210215-
St Ignace to False Detour Channel-
202 PM EDT Thu Aug 20 2026

.TONIGHT...South wind 10 to 15 knots. Slight chance of showers
after midnight. Waves 2 feet or less.
.FRIDAY...Southeast wind 10 to 15 knots. Chance of showers and
slight chance of thunderstorms. Waves 2 to 4 feet.
.FRIDAY NIGHT...South wind 10 to 15 knots. Chance of showers.
Waves 2 to 4 feet.
.SATURDAY...Northwest wind 10 to 15 knots. Chance of showers.
Waves 2 feet or less.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LHZ347-210215-
5NM East of Mackinac Bridge to Presque Isle Light MI including
Bois Blanc Island-
202 PM EDT Thu Aug 20 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY AFTERNOON THROUGH
FRIDAY EVENING...

.TONIGHT...South wind 10 to 15 knots. Partly cloudy early in the
evening then becoming mostly cloudy. Waves 2 feet or less.
.FRIDAY...South wind 10 to 15 knots with gusts to around 25 knots.
Chance of showers and slight chance of thunderstorms. Waves 2 to
4 feet.
.FRIDAY NIGHT...South wind 10 to 15 knots. Chance of showers.
Waves 2 to 4 feet.
.SATURDAY...Northwest wind 15 to 20 knots. Chance of showers.
Waves 2 to 3 feet.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LHZ348-210215-
Presque Isle Light to Sturgeon Pt MI Including Thunder Bay
National Marine Sanctuary-
202 PM EDT Thu Aug 20 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY AFTERNOON THROUGH
FRIDAY EVENING...

.TONIGHT...South wind 10 to 15 knots. Partly cloudy early in the
evening then becoming mostly cloudy. Waves 2 feet or less.
.FRIDAY...South wind 15 to 20 knots with gusts to around 25 knots.
Mostly sunny. Waves 2 to 4 feet.
.FRIDAY NIGHT...South wind 10 to 15 knots. Chance of showers.
Waves 2 to 4 feet.
.SATURDAY...West wind 10 to 15 knots. Chance of showers and
thunderstorms. Waves 2 to 3 feet.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

LHZ349-210215-
Sturgeon Pt to Alabaster MI-
202 PM EDT Thu Aug 20 2026

.TONIGHT...East wind 10 to 15 knots becoming south 5 to 10 knots
early in the morning. Partly cloudy. Waves 2 feet or less.
.FRIDAY...South wind 10 to 15 knots. Mostly sunny. Waves 2 to
3 feet.
.FRIDAY NIGHT...South wind 10 to 15 knots. Chance of showers.
Waves 2 to 3 feet.
.SATURDAY...West wind 5 to 10 knots. Showers likely and a chance
of thunderstorms. Waves 2 feet or less.

Winds and waves higher in the vicinity of thunderstorms.

See the open lakes forecast for days 3 through 5.

$$

MJG