Marine Weather, NWS WFO Duluth, MN

Nearshore Forecast

818
FZUS53 KDLH 221821
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
121 PM CDT Tue Sep 22 2026

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.

LSZ140-222200-
Grand Portage to Grand Marais MN-
121 PM CDT Tue Sep 22 2026

.REST OF TODAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or
less.
.TONIGHT...East wind 5 to 10 knots with gusts to around 20 knots
becoming southeast early in the morning. Mostly clear. Waves 1 to
2 feet.
.WEDNESDAY...Southeast wind 5 to 10 knots. Sunny. Waves 1 to
2 feet.
.WEDNESDAY NIGHT...East wind 10 to 15 knots with gusts to around
20 knots becoming south with gusts to around 20 knots after
midnight. Partly cloudy. Waves 1 to 3 feet.

$$

LSZ141-222200-
Grand Marais to Taconite Harbor MN-
121 PM CDT Tue Sep 22 2026

.REST OF TODAY...East wind 5 to 10 knots. Gusts up to 20 knots
late. Sunny. Waves 1 foot or less.
.TONIGHT...East wind 10 to 15 knots with gusts to around 20 knots
easing to 5 knots early in the morning. Mostly clear. Waves 1 to
2 feet.
.WEDNESDAY...East wind 5 to 10 knots. Mostly sunny. Waves 1 to
2 feet.
.WEDNESDAY NIGHT...East wind 5 to 10 knots becoming south early
in the morning. Partly cloudy in the evening then becoming mostly
cloudy. Waves 1 to 2 feet.

$$

LSZ142-222200-
Taconite Harbor to Silver Bay Harbor MN-
121 PM CDT Tue Sep 22 2026

.REST OF TODAY...East wind 5 to 10 knots. Gusts up to 20 knots
late. Sunny. Waves 1 to 2 feet.
.TONIGHT...Northeast wind 5 to 10 knots with gusts to around
20 knots becoming southeast early in the morning. Mostly clear.
Waves 1 to 3 feet.
.WEDNESDAY...Southeast wind 5 knots becoming east with gusts to
around 20 knots late in the afternoon. Mostly sunny. Waves 1 to
2 feet.
.WEDNESDAY NIGHT...East wind 5 to 10 knots becoming south early
in the morning. Partly cloudy in the evening then becoming mostly
cloudy. Waves 1 to 2 feet.

$$

LSZ143-222200-
Silver Bay Harbor to Two Harbors MN-
121 PM CDT Tue Sep 22 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...

.REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to
20 knots increasing to 25 knots late. Sunny. Waves 1 to 3 feet.
.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
25 knots becoming east 5 knots after midnight, then becoming
southeast early in the morning. Mostly clear. Waves 1 to 3 feet.
.WEDNESDAY...Southeast wind 5 knots becoming east 10 to 15 knots
with gusts to around 25 knots in the afternoon. Mostly sunny.
Waves 1 to 2 feet.
.WEDNESDAY NIGHT...Northeast wind 10 to 15 knots with gusts to
around 25 knots becoming east 5 knots after midnight, then
becoming south early in the morning. Partly cloudy in the evening
then becoming mostly cloudy. Waves 1 to 2 feet.

$$

LSZ144-222200-
Two Harbors to Duluth MN-
121 PM CDT Tue Sep 22 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...

.REST OF TODAY...Northeast wind 15 to 20 knots with gusts to
around 25 knots. Sunny. Waves 1 to 2 feet building to 2 to 4 feet
late.
.TONIGHT...Northeast wind 15 to 20 knots with gusts to around
25 knots becoming east 5 to 10 knots in the late evening and
early morning, then becoming southeast early in the morning.
Mostly clear. Waves 2 to 4 feet subsiding to 1 to 3 feet in the
late evening and overnight.
.WEDNESDAY...Southeast wind 5 knots becoming east 10 to 15 knots
with gusts to around 25 knots in the afternoon. Patchy fog in the
morning. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...East wind 10 to 15 knots with gusts to around
25 knots becoming southeast 5 to 10 knots after midnight. Partly
cloudy in the evening then becoming mostly cloudy. Waves 1 to
3 feet.

$$

LSZ145-222200-
Duluth MN to Port Wing WI-
121 PM CDT Tue Sep 22 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...

.REST OF TODAY...Northeast wind 15 to 20 knots. Gusts up to
20 knots increasing to 25 knots late. Sunny. Waves 1 to 2 feet
building to 2 to 4 feet late.
.TONIGHT...East wind 10 to 15 knots with gusts to around 25 knots
easing to 5 knots after midnight, then becoming southeast early
in the morning. Mostly clear. Waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight.
.WEDNESDAY...Southeast wind 5 knots becoming northeast 10 to
15 knots with gusts to around 20 knots in the afternoon. Patchy
fog in the morning. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...East wind 10 to 15 knots with gusts to around
20 knots becoming southeast 5 to 10 knots after midnight. Partly
cloudy in the evening then becoming mostly cloudy. Waves 1 to
3 feet.

$$

LSZ146-222200-
Port Wing to Sand Island WI-
121 PM CDT Tue Sep 22 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...

.REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to
20 knots increasing to 25 knots late. Sunny. Waves 1 to 3 feet.
.TONIGHT...East wind 10 to 15 knots with gusts to around 20 knots
becoming southeast 5 knots after midnight. Mostly clear. Waves
1 to 3 feet.
.WEDNESDAY...Southeast wind 5 knots becoming northeast with gusts
to around 20 knots in the afternoon. Sunny. Waves 1 to 2 feet.
.WEDNESDAY NIGHT...East wind 5 to 10 knots with gusts to around
20 knots becoming south after midnight. Mostly clear in the
evening then becoming mostly cloudy. Waves 1 to 2 feet.

$$

LSZ147-222200-
Sand Island to Bayfield WI-
121 PM CDT Tue Sep 22 2026

.REST OF TODAY...East wind 10 knots becoming northeast late.
Gusts up to 20 knots. Sunny. Waves 1 to 2 feet.
.TONIGHT...East wind 10 to 15 knots with gusts to around 20 knots
becoming southeast 5 to 10 knots after midnight. Mostly clear.
Waves 1 to 3 feet.
.WEDNESDAY...Southeast wind 5 knots becoming east with gusts to
around 20 knots in the afternoon. Sunny. Waves 1 foot or less.
.WEDNESDAY NIGHT...Northeast wind 5 to 10 knots becoming south
after midnight. Mostly clear in the evening then becoming mostly
cloudy. Waves 1 foot or less.

$$

LSZ150-222200-
Outer Apostle Islands Beyond 5 NM from Mainland-
121 PM CDT Tue Sep 22 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...

.REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to
20 knots increasing to 25 knots late. Sunny. Waves 1 to 3 feet.
.TONIGHT...East wind 10 to 15 knots with gusts to around 25 knots
becoming southeast 5 to 10 knots after midnight. Mostly clear.
Waves 1 to 3 feet subsiding to 1 to 2 feet early in the morning.
.WEDNESDAY...Southeast wind 5 knots becoming east with gusts to
around 20 knots in the afternoon. Sunny. Waves 1 to 2 feet.
.WEDNESDAY NIGHT...Northeast wind 5 to 10 knots becoming south
with gusts to around 20 knots after midnight. Partly cloudy.
Waves 1 to 2 feet.

$$

LSZ121-222200-
Chequamegon Bay-Bayfield to Oak Point WI-
121 PM CDT Tue Sep 22 2026

.REST OF TODAY...Northeast wind 10 knots rising to 10 to 15 knots
with gusts to around 20 knots late. Sunny. Waves 1 foot or less.
.TONIGHT...East wind 5 to 10 knots with gusts to around 20 knots
becoming south after midnight. Mostly clear. Waves 1 to 2 feet.
.WEDNESDAY...Southeast wind 5 knots becoming northeast in the
afternoon. Sunny. Waves 1 foot or less.
.WEDNESDAY NIGHT...Northeast wind 5 to 10 knots becoming south
after midnight. Mostly clear in the evening then becoming mostly
cloudy. Waves 1 foot or less.

$$

LSZ148-222200-
Oak Point to Saxon Harbor WI-
121 PM CDT Tue Sep 22 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING...

.REST OF TODAY...Northeast wind 10 to 15 knots. Gusts up to
20 knots increasing to 25 knots late. Sunny. Waves 1 to 3 feet.
.TONIGHT...Northeast wind 10 to 15 knots with gusts to around
20 knots becoming southeast 5 to 10 knots in the late evening and
overnight. Mostly clear. Waves 1 to 3 feet.
.WEDNESDAY...Southeast wind 5 knots becoming northeast in the
afternoon. Sunny. Waves 1 foot or less.
.WEDNESDAY NIGHT...Northeast wind 5 to 10 knots becoming south in
the late evening and overnight. Partly cloudy. Waves 1 foot or
less.

$$

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

WFO DLH

Open Waters Forecast

288
FZUS63 KMQT 221402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Tue Sep 22 2026

For waters beyond 5 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.

.SYNOPSIS...

30.4 inch high pressure over the Ontario-Quebec border shifts east
today and builds to 30.6 inches by Wednesday morning. Throughout
today and Wednesday, the high trails a 30.5 inch ridge over Lake
Superior while mainly easterly surface winds persist. The Quebec
high begins to break down Thursday morning, weakening to 30.4 inches
by Thursday night as light winds veer southerly. By late Friday, the
high weakens to 30.2 inches over the eastern Great Lakes basin as
29.5 inch low pressure develops over Montana. Southerly flow
persists through Saturday as the high deteriorates further and the
Montana low pressure deepens and moves north toward the Canadian
Prairies.



LSZ162-222000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Tue Sep 22 2026 /901 AM CDT Tue Sep 22 2026/

.REST OF TODAY...East winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing northeast late. Waves
calm to 2 feet building to 2 to 4 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east in the
afternoon, then increasing to 10 to 20 knots late. Waves building
to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots veering south after
midnight. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.THURSDAY...South winds 5 to 15 knots backing east by mid
afternoon. A slight chance of showers. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots becoming south less
than 10 knots after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south. A
chance of showers. Waves calm to 2 feet.

$$

LSZ263-222000-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
1001 AM EDT Tue Sep 22 2026

.REST OF TODAY...East winds 5 to 15 knots becoming northeast
10 to 20 knots late. Waves calm to 2 feet building to 1 to
3 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east late.
Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing southeast. Waves calm
to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ264-222000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EDT Tue Sep 22 2026

.REST OF TODAY...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.FRIDAY...South winds less than 10 knots becoming southeast 5 to
15 knots. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots veering south. A chance
of showers. Waves calm to 2 feet.

$$

LSZ265-222000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EDT Tue Sep 22 2026

.REST OF TODAY...Southeast winds 10 to 20 knots backing east
late. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming east 15 to
25 knots late. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots veering south. Waves calm to
2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south. Waves
calm to 2 feet.

$$

LSZ266-222000-
Lake Superior East of a line from Manitou Island to Marquette MI
and West of a line from Grand Marais MI to the US/Canadian Border
Beyond 5NM from shore-
1001 AM EDT Tue Sep 22 2026

.REST OF TODAY...Southeast winds 10 to 20 knots becoming east
5 to 15 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing east late. Waves calm to
2 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots becoming southeast 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south. Waves
calm to 2 feet.

$$

LSZ267-222000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EDT Tue Sep 22 2026

.REST OF TODAY...East winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing northeast late. Waves
calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots backing east in the
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots. Waves calm to
2 feet.
.THURSDAY...Southeast winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots veering south. Waves calm to
2 feet.
.SATURDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.

$$

LSZ261-222000-
MAFOR 2215/
Superior West 11200 11110 11120 12220 11310 11300 11310. Waves 1
to 3 feet.

Superior North Central 13310 11210 12310 12300. Waves 2 feet or
less.

Superior South Central 11310 13210 14310. Waves 1 to 2 feet.

Superior East 11210 11200 12100 11210 13310. Waves 2 feet or
less.

$$

WFO MQT

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

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

Beach Hazards

942
FZUS53 KDLH 220948
SRFDLH

Surf Zone Forecast
National Weather Service Duluth MN
448 AM CDT Tue Sep 22 2026

MNZ037-WIZ001-230400-
Carlton/Southern St. Louis-Douglas-
Including the beaches of Minnesota/Park Point and Wisconsin Point
448 AM CDT Tue Sep 22 2026

...BEACH HAZARDS STATEMENT IN EFFECT FROM 9 AM CDT THIS MORNING
THROUGH THIS EVENING...

.TODAY...
Swim Risk*..................High.
Wave Height.................Building to 2 to 4 feet in the
afternoon.
UV Index**..................Moderate.
Water Temperature...........In the upper 50s.
Weather.....................Sunny.
High Temperature............In the upper 50s.
Winds.......................East winds around 5 mph, increasing to
northeast around 15 mph in the
afternoon.
Sunrise.....................6:54 AM.
Sunset......................7:09 PM.

.WEDNESDAY...
Swim Risk*..................High.
Wave Height.................Around 1 foot, building to around 2
feet in the afternoon.
Weather.....................Mostly sunny.
High Temperature............In the upper 50s.
Winds.......................Southeast winds around 5 mph,
increasing to east around 15 mph in the
afternoon.
Sunrise.....................6:55 AM.
Sunset......................7:07 PM.

.THURSDAY...Wave height 1 foot or less. Cloudy. A chance of showers.
Highs in the lower 60s. South winds around 5 mph.
.FRIDAY...Wave height 1 foot or less. Mostly cloudy. Highs in the mid
60s. East winds around 5 mph.
.SATURDAY...Wave height 1 foot or less. Mostly cloudy. A chance of
showers. Highs in the lower 60s. Southeast winds around 10 mph.

&&

Swim Risk Category
* Low Risk - Large waves and dangerous currents are not expected,
however dangerous currents may exist at any time near piers,
breakwalls, and river outlets.
* Moderate Risk - Breaking waves and currents are expected. Stay away
from dangerous areas like piers, breakwalls, and river outlets.
Always have a flotation device with you in the water.
* High Risk - Life-threatening waves and currents are expected. Stay
out of the water and stay away from dangerous areas like piers and
breakwalls.

** For thunderstorm, waterspout, and UV definitions see:
https://www.weather.gov/beach/dlh


$$

Other Information

Great Lakes Water Levels and Forecasts - Provided by USACE

GLERL - NOAA Great Lakes Forecast System

NWS Marine Homepage

Cold Water Safety

Park Point Beach Information

Paddle Safe Twin Ports