Marine Weather, NWS WFO Duluth, MN

Nearshore Forecast

236
FZUS53 KDLH 101822
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
122 PM CDT Fri Jul 10 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.

LSZ140-102200-
Grand Portage to Grand Marais MN-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...South wind 5 knots. Mostly sunny. Waves 1 foot
or less.
.TONIGHT...Southeast wind 5 knots becoming north after midnight,
then becoming south early in the morning. Patchy fog after
midnight. Waves 1 foot or less.
.SATURDAY...Southwest wind 5 to 10 knots. Mostly sunny. Waves
1 foot or less.
.SATURDAY NIGHT...Southwest wind 5 to 10 knots. Partly cloudy.
Waves 1 foot or less.

$$

LSZ141-102200-
Grand Marais to Taconite Harbor MN-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...Southeast wind 5 knots. Mostly sunny. Waves
1 foot or less.
.TONIGHT...Variable winds 10 knots or less. Patchy fog. Waves
1 foot or less.
.SATURDAY...Variable winds 10 knots or less becoming southwest
5 knots in the late morning and afternoon. Mostly sunny. Waves
1 foot or less.
.SATURDAY NIGHT...Variable winds 10 knots or less becoming
northwest 5 knots early in the morning. Partly cloudy. Waves
1 foot or less.

$$

LSZ142-102200-
Taconite Harbor to Silver Bay Harbor MN-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...East wind 5 knots. Patchy fog early in the
afternoon. Waves 1 foot or less.
.TONIGHT...Variable winds 10 knots or less. Patchy fog after
midnight. Waves 1 foot or less.
.SATURDAY...Variable winds 10 knots or less. Sunny. Waves 1 foot
or less.
.SATURDAY NIGHT...Variable winds 10 knots or less. Partly cloudy.
Waves 1 foot or less.

$$

LSZ143-102200-
Silver Bay Harbor to Two Harbors MN-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...East wind 5 knots. Patchy fog early in the
afternoon. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 knots early in the evening becoming
variable 10 knots or less. Partly cloudy. Waves 1 foot or less.
.SATURDAY...Variable winds 10 knots or less becoming south
5 knots early in the afternoon, then becoming variable 10 knots
or less late in the afternoon. Sunny. Waves 1 foot or less.
.SATURDAY NIGHT...East wind 5 knots early in the evening becoming
variable 10 knots or less, then becoming west 5 knots early in
the morning. Partly cloudy. Waves 1 foot or less.

$$

LSZ144-102200-
Two Harbors to Duluth MN-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...East wind 5 knots. Sunny. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 knots early in the evening becoming
variable 10 knots or less. Partly cloudy. Waves 1 foot or less.
.SATURDAY...Variable winds 10 knots or less becoming south
5 knots in the late morning and afternoon. Sunny. Waves 1 foot or
less.
.SATURDAY NIGHT...South wind 5 knots becoming east late in the
evening, then becoming southwest after midnight. Mostly clear.
Waves 1 foot or less.

$$

LSZ145-102200-
Duluth MN to Port Wing WI-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...Northeast wind 5 knots. Sunny. Waves 1 foot or
less.
.TONIGHT...Northeast wind 5 knots in the evening becoming
variable 10 knots or less. Partly cloudy. Waves 1 foot or less.
.SATURDAY...Variable winds 10 knots or less becoming southwest
5 knots in the late morning and early afternoon, then becoming
southeast late in the afternoon. Sunny. Waves 1 foot or less.
.SATURDAY NIGHT...Southeast wind 5 knots becoming southwest after
midnight. Mostly clear. Waves 1 foot or less.

$$

LSZ146-102200-
Port Wing to Sand Island WI-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...Northeast wind 5 knots. Sunny. Waves 1 foot or
less.
.TONIGHT...East wind 5 knots early in the evening becoming
variable 10 knots or less. Partly cloudy. Waves 1 foot or less.
.SATURDAY...Variable winds 10 knots or less. Sunny. Waves 1 foot
or less.
.SATURDAY NIGHT...Variable winds 10 knots or less becoming
southwest 5 knots after midnight. Partly cloudy. Waves 1 foot or
less.

$$

LSZ147-102200-
Sand Island to Bayfield WI-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...East wind 5 knots. Sunny. Waves 1 foot or less.
.TONIGHT...East wind 5 knots early in the evening becoming
variable 10 knots or less. Partly cloudy. Waves 1 foot or less.
.SATURDAY...Variable winds 10 knots or less. Sunny. Waves 1 foot
or less.
.SATURDAY NIGHT...Variable winds 10 knots or less becoming south
5 knots late in the evening, then becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.

$$

LSZ150-102200-
Outer Apostle Islands Beyond 5 NM from Mainland-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...East wind 5 knots. Mostly sunny. Waves 1 foot or
less.
.TONIGHT...East wind 5 knots in the evening becoming variable
10 knots or less. Partly cloudy. Waves 1 foot or less.
.SATURDAY...Variable winds 10 knots or less becoming southeast
5 knots in the afternoon. Mostly sunny. Waves 1 foot or less.
.SATURDAY NIGHT...South wind 5 knots becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.

$$

LSZ121-102200-
Chequamegon Bay-Bayfield to Oak Point WI-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...East wind 5 knots. Sunny. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 knots early in the evening becoming
variable 10 knots or less. Mostly clear. Waves 1 foot or less.
.SATURDAY...Variable winds 10 knots or less becoming south
5 knots late in the morning, then becoming east in the afternoon.
Sunny. Waves 1 foot or less.
.SATURDAY NIGHT...East wind 5 knots becoming southwest in the
late evening and overnight. Mostly clear. Waves 1 foot or less.

$$

LSZ148-102200-
Oak Point to Saxon Harbor WI-
122 PM CDT Fri Jul 10 2026

.REST OF TODAY...Northeast wind 5 knots. Sunny. Waves 1 foot or
less.
.TONIGHT...East wind 5 knots early in the evening becoming
variable 10 knots or less, then becoming south 5 knots early in
the morning. Partly cloudy. Waves 1 foot or less.
.SATURDAY...Southwest wind 5 knots early in the morning becoming
variable 10 knots or less, then becoming east 5 knots in the
afternoon. Sunny. Waves 1 foot or less.
.SATURDAY NIGHT...Variable winds 10 knots or less becoming
southwest 5 knots 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

360
FZUS63 KMQT 101401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EDT Fri Jul 10 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...

Weak high pressure of 30.0 inches extends over Lake Superior from
Hudson Bay and northern Ontario today. High pressure builds to 30.1
to 30.2 inches over the lake this weekend as the high shifts south
to the Lower Great Lakes through Sunday. A strong low of around 29.3
inches looks to cross into Hudson Bay early next week. By Wednesday,
30.1 inch high pressure extends from the Canadian Prairie to the
southern Appalachians as 29.1 inch low pressure moves into northern
Quebec.



LSZ162-102000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EDT Fri Jul 10 2026 /900 AM CDT Fri Jul 10 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT /10 AM CDT/ THIS
MORNING...

.REST OF TODAY...Southeast winds 5 to 15 knots backing east in
the afternoon. Patchy fog by mid afternoon. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering south late.
Patchy dense fog after midnight. A slight chance of showers after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots veering north in
the afternoon, then increasing to 5 to 15 knots late. Waves calm
to 2 feet.
.SATURDAY NIGHT...North winds less than 10 knots becoming
southwest 5 to 15 knots after midnight. A slight chance of
showers. A slight chance of thunderstorms after midnight. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-102000-
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-
1000 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...South winds less than 10 knots backing northeast
in the afternoon, then veering east late. Waves calm to 2 feet.
.TONIGHT...East winds less than 10 knots backing north after
midnight, then backing southwest late. Patchy dense fog after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing south late. Waves calm to
2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. A slight chance of showers. A slight chance of
thunderstorms after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet.
.MONDAY...Southwest winds 20 to 30 knots increasing to gales to
35 knots. Waves subsiding to 2 to 4 feet, then building to 4 to
7 feet occasionally to 9 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-102000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...South winds less than 10 knots backing southeast
in the afternoon. Patchy fog. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots diminishing to less than
10 knots late. Patchy dense fog through midnight. Waves calm to
2 feet.
.SATURDAY...South winds less than 10 knots backing southeast
late. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
after midnight. A chance of showers and a slight chance of
thunderstorms after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet.
.MONDAY...Southwest winds 15 to 25 knots increasing to gales to
35 knots. Waves subsiding to 2 to 4 feet, then building to 5 to
8 feet occasionally to 10 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-102000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...Southeast winds 5 to 15 knots backing east in
the afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south late.
Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. A slight chance of showers and
thunderstorms after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots backing southeast by mid
afternoon. A slight chance of showers and thunderstorms through
early afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.MONDAY...West winds 10 to 20 knots becoming southwest 20 to
30 knots. Waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-102000-
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-
1000 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...Southeast winds 5 to 15 knots backing east late.
Patchy fog. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots. Areas of dense fog
through midnight. Patchy fog after midnight. Waves calm to
2 feet.
.SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of showers and
thunderstorms after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. A slight chance of showers and thunderstorms. Waves
calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to gales to
35 knots. Waves building to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...West gales to 35 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-102000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...Northwest winds 5 to 15 knots veering north in
the afternoon. Patchy fog. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots veering southeast after
midnight. Patchy dense fog. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing east late.
Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots. A slight chance of showers.
A slight chance of thunderstorms by mid afternoon. Waves calm to
2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to calm to 2 feet.

$$

LSZ261-102000-
MAFOR 1015/
Superior West 11300 13200 12100 11400 11500. Waves 1 foot or
less.

Superior North Central 11400 15300 11400. Waves 1 foot or less.

Superior South Central 12200 14300 12400. Waves 1 foot or less.

Superior East 13800 11100 19104 12304 12300. Waves 1 foot 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

098
FZUS53 KDLH 100808
SRFDLH

Surf Zone Forecast
National Weather Service Duluth MN
308 AM CDT Fri Jul 10 2026

MNZ037-WIZ001-110215-
Carlton/Southern St. Louis-Douglas-
Including the beaches of Minnesota/Park Point and Wisconsin Point
308 AM CDT Fri Jul 10 2026

.TODAY...
Swim Risk*..................Low.
Wave Height.................Around 1 foot in the afternoon.
UV Index**..................High.
Water Temperature...........In the mid to upper 60s.
Weather.....................Mostly sunny. Areas of dense fog.
High Temperature............In the lower 70s.
Winds.......................Northeast winds around 5 mph.
Sunrise.....................5:25 AM.
Sunset......................9:02 PM.

.SATURDAY...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
Weather.....................Sunny. Patchy dense fog. A slight
chance of showers and thunderstorms.
High Temperature............In the upper 70s.
Winds.......................Light and variable winds, becoming
southeast around 5 mph in the
afternoon.
Sunrise.....................5:26 AM.
Sunset......................9:02 PM.

.SUNDAY...Wave height 1 foot or less. Sunny. Highs in the lower 80s.
Southwest winds around 10 mph.
.MONDAY...Wave height around 1 foot. Sunny. Highs in the mid 80s.
Southwest winds around 10 mph.
.TUESDAY...Wave height 1 foot or less. Mostly sunny. Highs around 80.
West 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