360
FZUS53 KDLH 170857
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
357 AM CDT Thu Jul 17 2025

For waters within five nautical miles of shore on Lake 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.

LSZ140-141-171615-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
357 AM CDT Thu Jul 17 2025

.TODAY...Northwest wind 5 to 10 knots becoming southwest 10 to
15 knots in the afternoon. Sunny. Waves 1 to 2 feet.
.TONIGHT...West wind 10 to 15 knots. Partly cloudy. Waves 1 to
2 feet.
.FRIDAY...Southwest wind 10 to 15 knots. Chance of rain showers
through the day. Waves 1 to 2 feet.
.FRIDAY NIGHT...Southwest wind 5 to 10 knots becoming north early
in the morning. Chance of rain showers through the night. Waves
1 foot or less.

$$

LSZ142-171615-
Taconite Harbor to Silver Bay Harbor MN-
357 AM CDT Thu Jul 17 2025

.TODAY...Northwest wind 5 to 10 knots becoming southwest in the
afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots becoming west after
midnight. Mostly clear. Waves 1 foot or less.
.FRIDAY...Southwest wind 5 to 10 knots becoming south in the
afternoon. Chance of rain showers in the morning, then rain
showers likely and slight chance of thunderstorms in the
afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...Southeast wind 5 knots becoming northeast after
midnight. Rain showers likely and slight chance of thunderstorms
in the evening. Waves 1 foot or less.

$$

LSZ143-144-171615-
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
357 AM CDT Thu Jul 17 2025

.TODAY...Northwest wind 5 knots becoming southwest in the late
morning and early afternoon, then becoming south late in the
afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 knots becoming west in the late
evening and overnight. Mostly clear. Waves 1 foot or less.
.FRIDAY...West wind 5 knots becoming southeast late in the
afternoon. Chance of rain showers in the morning, then rain
showers likely and slight chance of thunderstorms in the
afternoon. Waves 1 foot or less.
.FRIDAY NIGHT...East wind 5 to 10 knots becoming northeast after
midnight. Rain showers likely in the evening. Slight chance of
thunderstorms through the night. Chance of rain showers after
midnight. Waves 1 foot or less.

$$

LSZ145-146-171615-
Duluth MN to Port Wing WI-Port Wing to Sand Island WI-
357 AM CDT Thu Jul 17 2025

.TODAY...West wind 5 knots becoming southwest in the afternoon.
Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 knots. Mostly clear. Waves 1 foot or
less.
.FRIDAY...South wind 5 knots becoming east late in the afternoon.
Chance of rain showers in the morning, then rain showers likely
and slight chance of thunderstorms in the afternoon. Waves 1 foot
or less.
.FRIDAY NIGHT...Northeast wind 5 to 10 knots. Rain showers likely
in the evening. Slight chance of thunderstorms through the night.
Slight chance of rain showers after midnight. Waves 1 foot or
less.

$$

LSZ147-171615-
Sand Island to Bayfield WI-
357 AM CDT Thu Jul 17 2025

.TODAY...Northwest wind 5 to 10 knots becoming southwest late in
the afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 knots. Mostly clear. Waves 1 foot or
less.
.FRIDAY...Southwest wind 5 to 10 knots becoming southeast late in
the afternoon. Chance of rain showers through the day. Waves
1 foot or less.
.FRIDAY NIGHT...East wind 5 knots becoming northeast early in the
morning. Chance of rain showers in the evening. Slight chance of
thunderstorms through the night. Slight chance of rain showers
after midnight. Waves 1 foot or less.

$$

LSZ150-171615-
Outer Apostle Islands Beyond 5 NM from Mainland-
357 AM CDT Thu Jul 17 2025

.TODAY...Northwest wind 5 to 10 knots becoming southwest in the
afternoon. Sunny. Waves 1 to 2 feet.
.TONIGHT...Southwest wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.FRIDAY...Southwest wind 5 to 10 knots becoming southeast late in
the afternoon. Chance of rain showers through the day. Waves
1 foot or less.
.FRIDAY NIGHT...East wind 5 knots becoming northeast early in the
morning. Chance of showers in the evening. Slight chance of
thunderstorms through the night. Slight chance of showers after
midnight. Waves 1 foot or less.

$$

LSZ121-171615-
Chequamegon Bay-Bayfield to Oak Point WI-
357 AM CDT Thu Jul 17 2025

.TODAY...Northwest wind 5 knots becoming east in the afternoon.
Sunny. Waves 1 foot or less.
.TONIGHT...Southeast wind 5 knots becoming southwest in the late
evening and overnight. Mostly clear. Waves 1 foot or less.
.FRIDAY...Southwest wind 5 knots becoming east late in the
afternoon. Chance of rain showers through the day. Waves 1 foot
or less.
.FRIDAY NIGHT...East wind 5 knots becoming northeast early in the
morning. Slight chance of thunderstorms in the evening. Rain
showers likely through the night. Chance of thunderstorms after
midnight. Waves 1 foot or less.

$$

LSZ148-171615-
Oak Point to Saxon Harbor WI-
357 AM CDT Thu Jul 17 2025

.TODAY...West wind 5 knots becoming northeast early in the
afternoon, then becoming southeast late in the afternoon. Sunny.
Waves 1 to 2 feet.
.TONIGHT...South wind 5 knots becoming southwest after midnight.
Mostly clear. Waves 1 foot or less.
.FRIDAY...Southwest wind 5 knots becoming east late in the
afternoon. Chance of rain showers through the day. Waves 1 foot
or less.
.FRIDAY NIGHT...East wind 5 knots becoming northeast early in the
morning. Slight chance of thunderstorms in the evening. Rain
showers likely through the night. Chance of thunderstorms after
midnight. Waves 1 foot or less.

$$

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

KML