Marine Weather, NWS WFO Duluth, MN

Nearshore Forecast

949
FZUS53 KDLH 221600
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
1100 AM CDT Wed Jul 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-
1100 AM CDT Wed Jul 22 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO
10 PM CDT THIS EVENING...

.REST OF TODAY...West wind 10 to 15 knots. Gusts up to 25 knots.
Mostly sunny. Waves 1 to 3 feet.
.TONIGHT...West wind 10 to 15 knots. Gusts up to 25 knots. Partly
cloudy. Waves 1 to 3 feet.
.THURSDAY...Southwest wind 15 to 20 knots. Gusts up to 25 knots
in the late morning and afternoon. Slight chance of rain showers
in the afternoon. Waves 1 to 2 feet building to 2 to 4 feet in
the late morning and afternoon. A small craft advisory may be
needed.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots. Gusts up to
25 knots early in the evening then 20 knots after midnight.
Slight chance of showers and thunderstorms in the evening. Waves
2 to 4 feet subsiding to 1 to 3 feet after midnight.

$$

LSZ141-222200-
Grand Marais to Taconite Harbor MN-
1100 AM CDT Wed Jul 22 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO
10 PM CDT THIS EVENING...

.REST OF TODAY...West wind 5 to 10 knots with gusts to around
20 knots becoming southwest 10 to 15 knots with gusts to around
20 knots late. Mostly sunny. Waves 1 to 2 feet.
.TONIGHT...West wind 5 to 10 knots. Gusts up to 20 knots early in
the evening. Mostly clear. Waves 1 to 2 feet.
.THURSDAY...Southwest wind 10 to 15 knots. Gusts up to 20 knots
in the late morning and afternoon. Slight chance of rain showers
in the afternoon. Waves 1 to 3 feet.
.THURSDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots early in the evening. Mostly cloudy in the evening then
becoming partly cloudy. Waves 1 to 2 feet.

$$

LSZ142-222200-
Taconite Harbor to Silver Bay Harbor MN-
1100 AM CDT Wed Jul 22 2026

.REST OF TODAY...West wind 5 knots becoming southwest with gusts
to around 20 knots in the afternoon. Mostly sunny. Waves 1 foot
or less.
.TONIGHT...West wind 5 knots. Mostly clear. Waves 1 foot or less.
.THURSDAY...Southwest wind 5 to 10 knots. Gusts up to 20 knots in
the late morning and afternoon. Mostly sunny. Waves 1 to 2 feet.
.THURSDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots early in the evening. Partly cloudy. Waves 1 foot or
less.

$$

LSZ143-222200-
Silver Bay Harbor to Two Harbors MN-
1100 AM CDT Wed Jul 22 2026

.REST OF TODAY...Southwest wind 5 knots. Mostly sunny. Waves
1 foot or less.
.TONIGHT...Southwest wind 5 knots. Mostly clear. Waves 1 foot or
less.
.THURSDAY...Southwest wind 5 to 10 knots. Gusts up to 20 knots in
the late morning and afternoon. Mostly sunny. Waves 1 foot or
less.
.THURSDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots early in the evening. Partly cloudy. Waves 1 to 2 feet.

$$

LSZ144-222200-
Two Harbors to Duluth MN-
1100 AM CDT Wed Jul 22 2026

.REST OF TODAY...Southwest wind 5 knots. Mostly sunny. Waves
1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.THURSDAY...Southwest wind 5 to 10 knots. Gusts up to 20 knots in
the afternoon. Sunny. Waves 1 foot or less.
.THURSDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots after midnight. Partly cloudy. Waves 1 to 2 feet.

$$

LSZ145-222200-
Duluth MN to Port Wing WI-
1100 AM CDT Wed Jul 22 2026

.REST OF TODAY...West wind 5 knots. Mostly sunny. Waves 1 foot or
less.
.TONIGHT...Southwest wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.THURSDAY...Southwest wind 5 to 10 knots. Sunny. Waves 1 foot or
less.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots. Gusts up to
20 knots after midnight. Partly cloudy. Waves 1 to 2 feet.

$$

LSZ146-222200-
Port Wing to Sand Island WI-
1100 AM CDT Wed Jul 22 2026

.REST OF TODAY...Southwest wind 5 knots. Mostly sunny. Waves
1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.THURSDAY...Southwest wind 5 to 10 knots. Gusts up to 20 knots in
the late morning and afternoon. Sunny. Waves 1 foot or less.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots. Gusts up to
20 knots after midnight. Partly cloudy. Waves 1 to 2 feet.

$$

LSZ147-222200-
Sand Island to Bayfield WI-
1100 AM CDT Wed Jul 22 2026

.REST OF TODAY...West wind 5 knots. Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.THURSDAY...Southwest wind 5 to 10 knots. Gusts up to 20 knots in
the late morning and afternoon. Sunny. Waves 1 foot or less.
.THURSDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots after midnight. Mostly clear. Waves 1 to 2 feet.

$$

LSZ150-222200-
Outer Apostle Islands Beyond 5 NM from Mainland-
1100 AM CDT Wed Jul 22 2026

.REST OF TODAY...West wind 5 knots becoming southwest late.
Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.THURSDAY...Southwest wind 5 to 10 knots with gusts to around
20 knots. Sunny. Waves 1 to 2 feet.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots. Gusts up to
20 knots in the late evening and overnight. Mostly clear. Waves
1 to 2 feet.

$$

LSZ121-222200-
Chequamegon Bay-Bayfield to Oak Point WI-
1100 AM CDT Wed Jul 22 2026

.REST OF TODAY...Northwest wind 5 knots becoming west late.
Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.THURSDAY...Southwest wind 5 to 10 knots. Sunny. Waves 1 foot or
less.
.THURSDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to
20 knots after midnight. Mostly clear. Waves 1 foot or less.

$$

LSZ148-222200-
Oak Point to Saxon Harbor WI-
1100 AM CDT Wed Jul 22 2026

.REST OF TODAY...West wind 5 knots becoming southwest late.
Sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.THURSDAY...Southwest wind 5 to 10 knots. Sunny. Waves 1 foot or
less.
.THURSDAY NIGHT...Southwest wind 10 to 15 knots. Gusts up to
20 knots in the late evening and overnight. Mostly clear. Waves
1 foot or less.

$$

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

WFO DLH

Open Waters Forecast

477
FZUS63 KMQT 221402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Wed Jul 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...

A 30.1 inches over the western part of the lake flattens and moves
east towards New England the rest of today into early Friday
morning. While ridging of around 30.0 inches looks to remain over
Lake Superior on Thursday, a weak 29.9 to 30.0 inch low could move
over the northwestern half of the lake by Thursday night into Friday
morning. As a low around 29.3 inches lifts from far northern Ontario
into Hudson Bay Friday night into Saturday morning, expect troughing
of around 29.8 inches to move into Lake Superior in response by
Saturday morning. Troughing of at least 29.8 inches looks to remain
over the lake for the rest of the day. While weak ridging of 29.8 to
29.9 inches develops over Lake Superior Sunday morning, a 29.6 inch
low moving in from the west moves over the Upper Great Lakes by
Monday morning.



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

.REST OF TODAY...West winds 5 to 15 knots backing southwest in
the afternoon, then increasing to 10 to 20 knots late. Waves calm
to 2 feet building to 1 to 3 feet.
.TONIGHT...Southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight, then becoming southwest 10 to 20 knots
late. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet, then building to 1 to 3 feet.
.FRIDAY...Southwest winds 15 to 25 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. Showers likely and a chance of
thunderstorms after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming northeast
5 to 15 knots. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots. A chance of showers and
thunderstorms. 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 Wed Jul 22 2026

.REST OF TODAY...Northwest winds 5 to 15 knots backing west in
the afternoon, then becoming southwest 10 to 20 knots late. Waves
calm to 2 feet building to 2 to 4 feet.
.TONIGHT...Southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight, then increasing to 10 to 20 knots late.
Waves subsiding to 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A slight chance of thunderstorms
through midnight. A slight chance of showers. Waves subsiding to
1 to 3 feet, then building to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots veering southwest
after midnight. Showers likely and a chance of thunderstorms
after midnight. Waves building to 4 to 7 feet occasionally to
9 feet.
.SATURDAY...Southwest winds 20 to 30 knots becoming northeast
5 to 15 knots. A chance of showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Northeast winds 5 to 15 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 Wed Jul 22 2026

.REST OF TODAY...Northwest winds 5 to 15 knots backing west in
the afternoon, then increasing to 10 to 20 knots late. Waves 1 to
3 feet subsiding to calm to 2 feet, then building to 1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 20 knots. Waves building to
2 to 4 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots. A slight chance
of thunderstorms through midnight. A slight chance of showers.
Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. Showers likely and a chance of thunderstorms
after midnight. Waves building to 4 to 7 feet occasionally to
9 feet.
.SATURDAY...Southwest winds 15 to 25 knots becoming northeast
5 to 15 knots. A chance of showers. Waves subsiding to calm to
2 feet.
.SUNDAY...East winds 5 to 15 knots. 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 Wed Jul 22 2026

.REST OF TODAY...Northwest winds 15 to 25 knots becoming west
10 to 20 knots late. Waves 1 to 3 feet subsiding to calm to
2 feet.
.TONIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots
after midnight. Waves building to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves building to 1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots backing south by mid
afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. A chance of showers after
midnight. Waves building to 2 to 4 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering north. A
chance of showers. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots veering southeast. A chance
of showers. 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 Wed Jul 22 2026

.REST OF TODAY...Northwest winds 15 to 25 knots backing west
late. Waves 2 to 4 feet.
.TONIGHT...West winds 10 to 20 knots increasing to 15 to 25 knots
late. Waves subsiding to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots backing southwest in the
afternoon. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. A slight chance of showers and
thunderstorms after midnight. Waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet.
.FRIDAY...Southwest winds 10 to 20 knots backing south by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Southwest winds 10 to 20 knots becoming north 5 to
15 knots. Showers. A chance of thunderstorms. Waves subsiding to
calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots veering southeast. 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 Wed Jul 22 2026

.REST OF TODAY...Northwest winds 15 to 25 knots backing west
late. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Southwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. A slight chance of showers after
midnight. Waves building to 1 to 3 feet.
.FRIDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...South winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet.
.SATURDAY...Southwest winds 10 to 20 knots veering northwest.
Showers. A chance of showers. Waves subsiding to calm to 2 feet.
.SUNDAY...North winds 10 to 20 knots becoming southeast 5 to
15 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ261-222000-
MAFOR 2215/
Superior West 11610 13520 11510 11610 12520. Waves 2 feet or less
this afternoon and tonight. Waves 1 to 3 feet Thursday morning.

Superior North Central 11720 11620 12630 13620 11520. Waves 1 to
3 feet this afternoon. Waves 2 to 4 feet tonight and Thursday
morning.

Superior South Central 12720 12610 14620. Waves 2 to 4 feet
subsiding to 1 to 3 feet this afternoon. Waves 1 to 3 feet
tonight and Thursday morning.

Superior East 12720 13620 12610 11510. Waves 3 to 5 feet this
afternoon. Waves 2 to 4 feet tonight and Thursday morning.

$$

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

750
FZUS53 KDLH 221004
SRFDLH

Surf Zone Forecast
National Weather Service Duluth MN
504 AM CDT Wed Jul 22 2026

MNZ037-WIZ001-230415-
Carlton/Southern St. Louis-Douglas-
Including the beaches of Minnesota/Park Point and Wisconsin Point
504 AM CDT Wed Jul 22 2026

.TODAY...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
UV Index**..................High.
Water Temperature...........In the upper 50s.
Weather.....................Sunny.
High Temperature............In the lower 70s.
Winds.......................West winds around 5 mph.
Sunrise.....................5:37 AM.
Sunset......................8:52 PM.

.THURSDAY...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
Weather.....................Sunny.
High Temperature............In the lower 80s.
Winds.......................Southwest winds around 10 mph.
Sunrise.....................5:38 AM.
Sunset......................8:51 PM.

.FRIDAY...Wave height around 1 foot. Sunny. Highs in the upper 70s.
Southwest winds around 15 mph.
.SATURDAY...Wave height 1 foot or less. Sunny. Highs in the mid 80s.
West winds around 10 mph.
.SUNDAY...Wave height 1 foot or less. Mostly sunny. A slight chance
of showers and thunderstorms. Cooler. Highs in the lower 70s.
Northeast 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