506
FZUS53 KDLH 152000
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
300 PM CDT Tue Jul 15 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.

LSZ140-141-160415-
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
300 PM CDT Tue Jul 15 2025

.TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in
the late evening and overnight. Rain showers and chance of
thunderstorms in the evening, then chance of rain showers and
slight chance of thunderstorms after midnight. Waves 1 to 2 feet.
.WEDNESDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots
until late afternoon. Chance of rain showers. Waves 1 to 2 feet.
.WEDNESDAY NIGHT...Northeast wind 5 to 10 knots becoming north
after midnight. Chance of rain showers. Waves 1 to 2 feet.
.THURSDAY...Northwest wind 5 to 10 knots becoming southwest 10 to
15 knots with gusts to around 20 knots in the afternoon. Sunny.
Waves 1 foot or less.

$$

LSZ143-160415-
Silver Bay Harbor to Two Harbors MN-
300 PM CDT Tue Jul 15 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH WEDNESDAY EVENING...

.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
20 knots. Rain showers and chance of thunderstorms in the
evening, then rain showers likely and chance of thunderstorms
after midnight. Waves 1 to 3 feet.
.WEDNESDAY...Northeast wind 10 to 15 knots with gusts to around
20 knots. Chance of rain showers. Waves 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to
around 20 knots becoming north 5 to 10 knots after midnight.
Chance of rain showers. Waves 1 to 3 feet subsiding to 1 to
2 feet in the late evening and overnight.
.THURSDAY...North wind 5 to 10 knots becoming south in the
afternoon. Sunny. Waves 1 foot or less.

$$

LSZ142-160415-
Taconite Harbor to Silver Bay Harbor MN-
300 PM CDT Tue Jul 15 2025

.TONIGHT...Northeast wind 5 to 10 knots. Rain showers and chance
of thunderstorms early in the evening, then rain showers likely
and chance of thunderstorms late in the evening. Chance of rain
showers and slight chance of thunderstorms after midnight. Waves
1 to 2 feet.
.WEDNESDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots
until late afternoon. Chance of rain showers. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...Northeast wind 5 to 10 knots becoming north
after midnight. Chance of rain showers. Waves 1 to 3 feet.
.THURSDAY...Northwest wind 5 knots becoming southwest in the
afternoon. Sunny. Waves 1 foot or less.

$$

LSZ144-145-160415-
Two Harbors to Duluth MN-Duluth MN to Port Wing WI-
300 PM CDT Tue Jul 15 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH WEDNESDAY EVENING...

.TONIGHT...Northeast wind 15 to 20 knots with gusts to around
25 knots. Rain showers with thunderstorms likely in the evening,
then rain showers likely and chance of thunderstorms after
midnight. Waves 1 to 3 feet building to 2 to 4 feet late in the
night.
.WEDNESDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots. Rain showers likely in the morning, then chance of rain
showers in the afternoon. Waves 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to
around 20 knots becoming north 5 to 10 knots early in the
morning. Chance of rain showers. Waves 2 to 4 feet subsiding to
1 to 3 feet in the late evening and overnight.
.THURSDAY...North wind 5 to 10 knots becoming southeast in the
afternoon. Sunny. Waves 1 foot or less.

$$

LSZ146-160415-
Port Wing to Sand Island WI-
300 PM CDT Tue Jul 15 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH WEDNESDAY EVENING...

.TONIGHT...North wind 5 knots becoming northeast 10 to 15 knots
with gusts to around 25 knots in the late evening and overnight.
Rain showers with thunderstorms likely in the evening, then rain
showers likely and chance of thunderstorms after midnight. Waves
1 to 3 feet.
.WEDNESDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots. Rain showers likely in the morning, then chance of rain
showers in the afternoon. Waves 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to
around 20 knots becoming north 5 to 10 knots early in the
morning. Chance of rain showers in the evening, then slight
chance of rain showers after midnight. Waves 1 to 3 feet
subsiding to 1 to 2 feet in the late evening and overnight.
.THURSDAY...Northwest wind 5 knots becoming south in the
afternoon. Sunny. Waves 1 foot or less.

$$

LSZ147-160415-
Sand Island to Bayfield WI-
300 PM CDT Tue Jul 15 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH WEDNESDAY EVENING...

.TONIGHT...North wind 5 knots becoming northeast 10 to 15 knots
with gusts to around 25 knots in the late evening and overnight.
Rain showers and chance of thunderstorms in the evening, then
rain showers likely and chance of thunderstorms after midnight.
Waves 1 to 3 feet.
.WEDNESDAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots
decreasing to 20 knots late in the afternoon. Rain showers likely
in the morning, then chance of rain showers in the afternoon.
Waves 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast wind 5 to 10 knots with gusts to
around 20 knots becoming north early in the morning. Chance of
rain showers in the evening, then slight chance of rain showers
after midnight. Waves 1 to 3 feet.
.THURSDAY...Northwest wind 5 knots becoming south in the
afternoon. Sunny. Waves 1 foot or less.

$$

LSZ150-160415-
Outer Apostle Islands Beyond 5 NM from Mainland-
300 PM CDT Tue Jul 15 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH WEDNESDAY EVENING...

.TONIGHT...Northeast wind 15 to 20 knots with gusts to around
25 knots. Rain showers and chance of thunderstorms in the
evening, then rain showers likely and chance of thunderstorms
after midnight. Waves 1 to 2 feet building to 2 to 4 feet after
midnight.
.WEDNESDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots. Rain showers likely in the morning, then chance of rain
showers and slight chance of thunderstorms in the afternoon.
Waves 3 to 5 feet.
.WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to
around 20 knots becoming north 5 to 10 knots early in the
morning. Chance of rain showers in the evening, then slight
chance of rain showers after midnight. Waves 2 to 4 feet
subsiding to 1 to 2 feet after midnight. A small craft advisory
may be needed.
.THURSDAY...Northwest wind 5 to 10 knots becoming south in the
afternoon. Sunny. Waves 1 foot or less.

$$

LSZ121-160415-
Chequamegon Bay-Bayfield to Oak Point WI-
300 PM CDT Tue Jul 15 2025

...SEVERE THUNDERSTORM WATCH 513 IN EFFECT UNTIL 10 PM CDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH WEDNESDAY EVENING...

.TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots
after midnight. Showers and thunderstorms in the evening, then
rain showers likely and chance of thunderstorms after midnight.
Waves 1 to 2 feet building to 2 to 4 feet after midnight.
.WEDNESDAY...Northeast wind 15 to 20 knots with gusts to around
25 knots. Rain showers likely in the morning. Slight chance of
thunderstorms through the day. Chance of rain showers in the
afternoon. Waves 3 to 5 feet.
.WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to
around 20 knots becoming north 5 to 10 knots early in the
morning. Slight chance of thunderstorms in the evening. Rain
showers likely through the night. Waves 2 to 4 feet subsiding to
1 to 2 feet after midnight. A small craft advisory may be needed.
.THURSDAY...North wind 5 to 10 knots becoming east late in the
afternoon. Sunny. Waves 1 foot or less.

$$

LSZ148-160415-
Oak Point to Saxon Harbor WI-
300 PM CDT Tue Jul 15 2025

...SEVERE THUNDERSTORM WATCH 513 IN EFFECT UNTIL 10 PM CDT THIS
EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM CDT THIS EVENING
THROUGH WEDNESDAY EVENING...

.TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots
after midnight. Showers and thunderstorms in the evening, then
rain showers likely and chance of thunderstorms after midnight.
Waves 1 to 2 feet building to 2 to 4 feet after midnight.
.WEDNESDAY...Northeast wind 15 to 20 knots easing to 5 to
15 knots late in the afternoon. Gusts up to 25 knots. Rain
showers likely and slight chance of thunderstorms in the morning,
then chance of rain showers and slight chance of thunderstorms in
the afternoon. Waves 3 to 5 feet.
.WEDNESDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to
20 knots in the evening. Slight chance of thunderstorms in the
evening. Rain showers likely through the night. Waves 2 to 4 feet
subsiding to 1 to 2 feet after midnight. A small craft advisory
may be needed.
.THURSDAY...North wind 5 to 10 knots becoming east late in the
afternoon. Sunny. Waves 1 to 2 feet.

$$

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

Rothstein