Marine Weather, NWS WFO Duluth, MN

Nearshore Forecast

534
FZUS53 KDLH 011439
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
939 AM CDT Sat Nov 1 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.

LSZ140-012200-
Grand Portage to Grand Marais MN-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 to 10 knots becoming west late.
Partly sunny. Waves 1 foot or less.
.TONIGHT...West wind 15 to 20 knots with gusts to around
25 knots. Partly cloudy in the evening then becoming mostly
cloudy. Waves 1 to 2 feet building to 1 to 3 feet early in the
morning.
.SUNDAY...Southwest wind up to 30 knots. Gusts up to 30 knots
increasing to 45 knots. Chance of rain in the afternoon. Waves
4 to 6 feet building to 8 to 13 feet. Waves occasionally to
17 feet. A gale warning may be needed.
.SUNDAY NIGHT...Southwest wind up to 30 knots with gales to
around 45 knots becoming west 15 to 20 knots with gusts to around
30 knots after midnight. Chance of rain through the night. Waves
8 to 13 feet subsiding to 4 to 6 feet. Waves occasionally to
17 feet. A gale warning may be needed.

$$

LSZ141-012200-
Grand Marais to Taconite Harbor MN-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 to 10 knots becoming west late.
Mostly sunny. Waves 1 foot or less.
.TONIGHT...West wind 10 to 15 knots. Gusts up to 25 knots. Partly
cloudy in the evening then becoming mostly cloudy. Waves 1 to
2 feet.
.SUNDAY...Southwest wind up to 30 knots with gales to around
40 knots. Slight chance of rain in the afternoon. Waves 3 to
5 feet building to 7 to 10 feet in the late morning and
afternoon. Waves occasionally to 13 feet. A gale warning may be
needed.
.SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to
around 40 knots becoming west 15 to 20 knots with gusts to around
30 knots after midnight. Chance of rain through the night. Waves
6 to 9 feet subsiding to 4 to 6 feet after midnight. Waves
occasionally to 12 feet. A gale warning may be needed.

$$

LSZ142-012200-
Taconite Harbor to Silver Bay Harbor MN-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 to 10 knots becoming west late.
Mostly sunny. Waves 1 foot or less.
.TONIGHT...West wind 15 to 20 knots with gusts to around
25 knots. Partly cloudy. Waves 1 to 2 feet.
.SUNDAY...Southwest wind 20 to 25 knots. Gusts up to 30 knots
increasing to 40 knots. Slight chance of rain in the afternoon.
Waves 2 to 4 feet building to 5 to 8 feet in the late morning and
afternoon. Waves occasionally to 11 feet. A gale warning may be
needed.
.SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to
around 35 knots becoming west 10 to 15 knots with gusts to around
30 knots after midnight. Chance of rain through the night. Waves
4 to 7 feet subsiding to 1 to 3 feet. Waves occasionally to
9 feet. A gale warning may be needed.

$$

LSZ143-012200-
Silver Bay Harbor to Two Harbors MN-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 knots becoming west late. Mostly
sunny. Waves 1 foot or less.
.TONIGHT...West wind 15 to 20 knots with gusts to around
25 knots. Partly cloudy. Waves 1 to 3 feet.
.SUNDAY...Southwest wind 20 to 25 knots. Gusts up to 30 knots
increasing to 40 knots. Slight chance of rain in the afternoon.
Waves 5 to 8 feet. Waves occasionally to 10 feet. A gale warning
may be needed.
.SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to
around 40 knots becoming west 15 to 20 knots with gusts to around
30 knots after midnight. Chance of rain through the night. Waves
4 to 7 feet subsiding to 1 to 2 feet. Waves occasionally to
9 feet. A gale warning may be needed.

$$

LSZ144-012200-
Two Harbors to Duluth MN-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 to 10 knots becoming west late.
Mostly sunny. Waves 1 foot or less.
.TONIGHT...West wind 5 to 10 knots becoming southwest 15 to
20 knots with gusts to around 25 knots after midnight. Partly
cloudy. Waves 1 to 2 feet.
.SUNDAY...Southwest wind 20 to 25 knots. Gusts up to 30 knots
increasing to 35 knots in the late morning and afternoon. Partly
sunny. Waves 4 to 6 feet. Waves occasionally to 8 feet. A gale
warning may be needed.
.SUNDAY NIGHT...West wind 20 to 25 knots with gales to around
35 knots easing to 15 to 20 knots with gusts to around 30 knots
early in the morning. Chance of rain through the night. Waves
4 to 6 feet subsiding to 1 to 3 feet. Waves occasionally to
8 feet. A gale warning may be needed.

$$

LSZ145-012200-
Duluth MN to Port Wing WI-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 to 10 knots becoming west late.
Partly sunny. Waves 1 to 2 feet.
.TONIGHT...West wind 5 to 10 knots becoming southwest 15 to
20 knots with gusts to around 25 knots after midnight. Partly
cloudy. Waves 1 to 2 feet.
.SUNDAY...Southwest wind 20 to 25 knots. Gusts up to 30 knots
increasing to 35 knots in the late morning and afternoon. Partly
sunny. Waves 4 to 6 feet. Waves occasionally to 7 feet. A gale
warning may be needed.
.SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to
around 35 knots becoming west 15 to 20 knots with gusts to around
30 knots after midnight. Chance of rain. Waves 4 to 6 feet. Waves
occasionally to 7 feet. A gale warning may be needed.

$$

LSZ146-012200-
Port Wing to Sand Island WI-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 knots becoming west late. Partly
sunny. Waves 1 to 2 feet.
.TONIGHT...Southwest wind 15 to 20 knots with gusts to around
25 knots. Partly cloudy. Waves 1 to 3 feet.
.SUNDAY...Southwest wind 20 to 25 knots. Gusts up to 30 knots
increasing to 40 knots. Slight chance of rain in the afternoon.
Waves 4 to 7 feet. Waves occasionally to 9 feet. A gale warning
may be needed.
.SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to
around 40 knots becoming west 15 to 20 knots with gusts to around
30 knots early in the morning. Chance of rain through the night.
Waves 4 to 7 feet subsiding to 3 to 5 feet early in the morning.
Waves occasionally to 9 feet. A gale warning may be needed.

$$

LSZ147-012200-
Sand Island to Bayfield WI-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 knots becoming northwest late.
Partly sunny. Waves 1 to 2 feet.
.TONIGHT...Southwest wind 15 to 20 knots with gusts to around
25 knots. Partly cloudy. Waves 1 to 2 feet.
.SUNDAY...Southwest wind 20 to 25 knots. Gusts up to 30 knots
increasing to 40 knots. Slight chance of rain in the afternoon.
Waves 4 to 6 feet. Waves occasionally to 8 feet. A gale warning
may be needed.
.SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to
around 40 knots becoming west 15 to 20 knots with gusts to around
30 knots early in the morning. Chance of rain through the night.
Waves 4 to 6 feet. Waves occasionally to 8 feet. A gale warning
may be needed.

$$

LSZ150-012200-
Outer Apostle Islands Beyond 5 NM from Mainland-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 to 10 knots becoming northwest
late. Partly sunny. Waves 1 to 3 feet.
.TONIGHT...Southwest wind 15 to 20 knots with gusts to around
25 knots. Partly cloudy. Waves 1 to 3 feet.
.SUNDAY...Southwest wind up to 30 knots. Gusts up to 30 knots
increasing to 40 knots. Slight chance of rain in the afternoon.
Waves 5 to 8 feet. Waves occasionally to 10 feet. A gale warning
may be needed.
.SUNDAY NIGHT...Southwest wind up to 30 knots with gales to
around 40 knots becoming west 20 to 25 knots with gales to around
35 knots early in the morning. Chance of rain through the night.
Waves 5 to 8 feet. Waves occasionally to 10 feet. A gale warning
may be needed.

$$

LSZ121-012200-
Chequamegon Bay-Bayfield to Oak Point WI-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 knots becoming northwest late.
Partly sunny. Waves 1 foot or less.
.TONIGHT...Southwest wind 10 to 15 knots with gusts to around
20 knots. Partly cloudy. Waves 1 foot or less.
.SUNDAY...Southwest wind 20 to 25 knots with gales to around
40 knots. Slight chance of rain in the afternoon. Waves 1 to
3 feet. A gale warning may be needed.
.SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to
around 40 knots becoming west 15 to 20 knots with gusts to around
30 knots early in the morning. Chance of rain through the night.
Waves 1 to 3 feet. A gale warning may be needed.

$$

LSZ148-012200-
Oak Point to Saxon Harbor WI-
939 AM CDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North wind 5 to 10 knots becoming northwest
late. Slight chance of drizzle late in the morning. Waves 1 to
3 feet.
.TONIGHT...Southwest wind 10 to 15 knots with gusts to around
20 knots. Partly cloudy. Waves 1 to 2 feet.
.SUNDAY...Southwest wind 20 to 25 knots. Gusts up to 30 knots
increasing to 40 knots. Slight chance of rain in the afternoon.
Waves 1 to 2 feet building to 3 to 5 feet in the late morning and
afternoon. A gale warning may be needed.
.SUNDAY NIGHT...Southwest wind 20 to 25 knots with gales to
around 40 knots becoming west 15 to 20 knots with gusts to around
30 knots early in the morning. Chance of rain through the night.
Waves 2 to 4 feet. A gale warning may be needed.

$$

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

WFO DLH

Open Waters Forecast

211
FZUS63 KMQT 011401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Sat Nov 1 2025

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...

30.1 inch ridging builds over the lake today as a 30.3 inch high
pressure shifts from the Central Plains to the Midwest. A 29.3 inch
low moving across northern Canada will reach Hudson Bay at 29.1
inches by Monday morning, pulling a 29.6 inch trough across Lake
Superior Sunday night into Monday. A 30.0 inch ridge then rebuilds
over the lake on Tuesday followed by a 29.9 inch low moving over
Lake Michigan Tuesday night. This will be followed by a 30.2 inch
high moving from the Northern Plains to the the Great Lakes late
Wednesday.


LSZ162-012000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Sat Nov 1 2025 /901 AM CDT Sat Nov 1 2025/

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
AFTERNOON...

.REST OF TODAY...North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing west late. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
Waves building to 2 to 4 feet.
.SUNDAY...Southwest gales to 40 knots. A slight chance of rain
showers by mid afternoon. Waves building to 9 to 12 feet
occasionally to 15 feet.
.SUNDAY NIGHT...West gales to 40 knots. A chance of showers.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.MONDAY...West gales to 35 knots diminishing to 20 to 30 knots by
mid afternoon. Waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots veering northwest. Waves
calm to 2 feet.

$$

LSZ263-012000-
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 Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH LATE MONDAY
NIGHT...

.REST OF TODAY...North winds 5 to 15 knots backing northwest
late. A slight chance of rain showers. Waves 1 to 3 feet
subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
Waves building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Southwest gales to 45 knots. A chance of rain showers
by mid afternoon. Waves building to 10 to 14 feet occasionally to
18 feet.
.SUNDAY NIGHT...Southwest gales to 45 knots becoming west gales
to 40 knots after midnight. A chance of showers. Waves subsiding
to 7 to 10 feet occasionally to 13 feet.
.MONDAY...West gales to 40 knots. Waves subsiding to 6 to 9 feet
occasionally to 11 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.MONDAY NIGHT...West gales to 35 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...West winds 15 to 25 knots becoming southwest 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...West winds 20 to 30 knots becoming northwest 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.

$$

LSZ264-012000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY MORNING THROUGH LATE MONDAY
NIGHT...

.REST OF TODAY...North winds 5 to 15 knots backing northwest
late. A slight chance of rain showers by late morning. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest after
midnight, then increasing to 15 to 25 knots late. Waves building
to 2 to 4 feet.
.SUNDAY...Southwest gales to 45 knots. A chance of rain showers
by mid afternoon. Waves building to 10 to 14 feet occasionally to
18 feet.
.SUNDAY NIGHT...Southwest gales to 45 knots becoming west gales
to 40 knots after midnight. A chance of showers. Waves subsiding
to 8 to 11 feet occasionally to 14 feet.
.MONDAY...West gales to 40 knots. Waves subsiding to 7 to 10 feet
occasionally to 13 feet, then building to 8 to 11 feet
occasionally to 14 feet.
.MONDAY NIGHT...West gales to 35 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West winds 20 to 30 knots becoming southwest 5 to
15 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots. Waves building to
3 to 6 feet occasionally to 8 feet, then subsiding to 2 to
4 feet.

$$

LSZ265-012000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH TUESDAY
MORNING...

.REST OF TODAY...North winds 10 to 20 knots. A chance of rain
showers. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then backing southwest late. A slight chance of
rain showers through midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 15 to 25 knots increasing to gales to
40 knots in the afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY NIGHT...Southwest gales to 40 knots veering west after
midnight. Showers likely through midnight, then a chance of
showers after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.MONDAY...West gales to 40 knots. A slight chance of showers
through early afternoon. Waves 5 to 8 feet occasionally to
10 feet.
.MONDAY NIGHT...West gales to 40 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...West winds 20 to 30 knots becoming southwest 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. A
chance of rain showers. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.

$$

LSZ266-012000-
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 Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH TUESDAY
MORNING...

.REST OF TODAY...North winds 10 to 20 knots. A chance of rain
showers. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots becoming west 10 to
20 knots after midnight, then backing southwest late. A slight
chance of rain showers through midnight. Waves building to 2 to
4 feet.
.SUNDAY...Southwest winds 20 to 30 knots increasing to gales to
40 knots in the afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 8 to 11 feet occasionally to
14 feet.
.SUNDAY NIGHT...Southwest gales to 40 knots veering west after
midnight. Showers through midnight, then a chance of showers
after midnight. Waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 9 to 12 feet occasionally to 15 feet.
.MONDAY...West gales to 40 knots. A chance of showers. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 9 to 12 feet occasionally to 15 feet.
.MONDAY NIGHT...West gales to 40 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. A chance of showers. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...West gales to 35 knots veering northwest. A chance
of rain showers. Waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ267-012000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EDT Sat Nov 1 2025

...GALE WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH TUESDAY
MORNING...

.REST OF TODAY...North winds 10 to 20 knots. A slight chance of
rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots backing southwest late.
A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds 15 to 25 knots increasing to gales to
35 knots. A slight chance of rain showers by mid afternoon. Waves
building to 7 to 10 feet occasionally to 13 feet.
.SUNDAY NIGHT...Southwest gales to 40 knots. Showers. Waves
building to 8 to 12 feet occasionally to 15 feet.
.MONDAY...West gales to 45 knots. Showers likely through early
afternoon, then a chance of showers by mid afternoon. Waves
building to 10 to 14 feet occasionally to 18 feet.
.MONDAY NIGHT...West gales to 40 knots. Waves subsiding to 6 to
9 feet occasionally to 11 feet.
.TUESDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. A chance of showers. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 15 to 25 knots veering northwest. A
chance of rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ261-012000-
MAFOR 0115/
Superior West 11810 11700 12600 11510 11520 11530 11550. Waves 1
to 3 feet this afternoon and tonight. Waves 3 to 5 feet building
to 4 to 7 feet Sunday morning.

Superior North Central 12810 11700 11600 11510 11520 11530 11540.
Waves 1 to 3 feet this afternoon and tonight. Waves 3 to 5 feet
building to 4 to 7 feet Sunday morning.

Superior South Central 13810 11700 11610 11510 11520 11530. A
chance of showers this afternoon. A chance of rain showers this
evening. Waves 1 to 3 feet.

Superior East 12810 12700 11600 11610 11520 11530. Waves 1 to 2
feet this afternoon and tonight. Waves 2 to 3 feet building to 3
to 5 feet Sunday 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

This product is only issued between May 26th and October 1st.

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