Marine Weather, NWS WFO Duluth, MN

Nearshore Forecast

311
FZUS53 KDLH 290502
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
1202 AM CDT Sat Aug 29 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.

LSZ140-291600-
Grand Portage to Grand Marais MN-
1202 AM CDT Sat Aug 29 2026

.TODAY...East wind 5 knots becoming southeast in the afternoon.
Slight chance of rain showers in the late morning and early
afternoon. Chance of rain showers late in the afternoon. Waves
1 foot or less.
.TONIGHT...Southeast wind 5 knots becoming northeast in the late
evening and overnight. Mostly cloudy. Waves 1 foot or less.
.SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots.
Slight chance of rain showers in the afternoon. Waves 1 to
2 feet.
.SUNDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to
25 knots decreasing to 20 knots early in the morning. Slight
chance of rain showers in the evening, then chance of rain
showers and slight chance of thunderstorms after midnight. Waves
1 to 3 feet.

$$

LSZ141-291600-
Grand Marais to Taconite Harbor MN-
1202 AM CDT Sat Aug 29 2026

.TODAY...East wind 5 knots. Chance of rain showers and slight
chance of thunderstorms through the day. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 knots. Mostly cloudy. Waves 1 foot or
less.
.SUNDAY...East wind 10 to 15 knots. Gusts up to 25 knots. Slight
chance of rain showers in the afternoon. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to
30 knots decreasing to 25 knots early in the morning. Chance of
rain showers through the night. Slight chance of thunderstorms
after midnight. Waves 1 to 3 feet.

$$

LSZ142-291600-
Taconite Harbor to Silver Bay Harbor MN-
1202 AM CDT Sat Aug 29 2026

.TODAY...Northeast wind 5 knots. Chance of rain showers and
slight chance of thunderstorms through the day. Waves 1 foot or
less.
.TONIGHT...Northeast wind 5 knots. Mostly cloudy. Waves 1 foot or
less.
.SUNDAY...Northeast wind 5 to 10 knots. Gusts up to 25 knots.
Chance of rain showers in the afternoon. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to
25 knots decreasing to 20 knots early in the morning. Chance of
showers in the evening. Slight chance of thunderstorms through
the night. Showers likely after midnight. Waves 1 to 3 feet.

$$

LSZ143-291600-
Silver Bay Harbor to Two Harbors MN-
1202 AM CDT Sat Aug 29 2026

.TODAY...Northeast wind 5 to 10 knots. Chance of rain showers and
slight chance of thunderstorms in the morning, then slight chance
of rain showers in the afternoon. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 to 10 knots. Gusts up to 20 knots
early in the morning. Mostly cloudy. Waves 1 foot or less.
.SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Slight
chance of rain showers in the morning, then chance of rain
showers in the afternoon. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to
25 knots decreasing to 20 knots early in the morning. Chance of
rain showers in the evening. Slight chance of thunderstorms
through the night. Rain showers likely after midnight. Waves 1 to
3 feet.

$$

LSZ144-291600-
Two Harbors to Duluth MN-
1202 AM CDT Sat Aug 29 2026

.TODAY...Northeast wind 5 to 10 knots. Chance of showers and
thunderstorms in the morning, then slight chance of rain showers
in the afternoon. Waves 1 foot or less.
.TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots
early in the morning. Mostly cloudy. Waves 1 foot or less.
.SUNDAY...Northeast wind 15 to 20 knots. Gusts up to 20 knots
increasing to 25 knots in the late morning and afternoon. Slight
chance of rain showers in the morning, then chance of rain
showers in the afternoon. Waves 1 to 2 feet building to 1 to
3 feet late in the afternoon.
.SUNDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to
25 knots decreasing to 20 knots early in the morning. Slight
chance of thunderstorms in the evening. Chance of showers through
the night. Chance of thunderstorms after midnight. Waves 1 to
3 feet.

$$

LSZ145-291600-
Duluth MN to Port Wing WI-
1202 AM CDT Sat Aug 29 2026

.TODAY...East wind 5 to 10 knots. Chance of thunderstorms in the
morning. Chance of rain showers until late afternoon, then slight
chance of rain showers late in the afternoon. Waves 1 foot or
less.
.TONIGHT...Northeast wind 10 to 15 knots. Mostly cloudy. Waves
1 foot or less.
.SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots
increasing to 25 knots in the afternoon. Slight chance of showers
in the morning, then chance of showers in the afternoon. Waves
1 to 2 feet building to 1 to 3 feet late in the afternoon.
.SUNDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to
25 knots. Slight chance of thunderstorms in the evening. Chance
of showers through the night. Chance of thunderstorms after
midnight. Waves 1 to 3 feet.

$$

LSZ146-291600-
Port Wing to Sand Island WI-
1202 AM CDT Sat Aug 29 2026

.TODAY...East wind 5 knots becoming northeast late in the
afternoon. Slight chance of thunderstorms in the morning. Chance
of showers until late afternoon, then slight chance of showers
late in the afternoon. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 to 10 knots. Mostly cloudy. Waves
1 foot or less.
.SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots.
Slight chance of showers in the morning. Chance of showers in the
afternoon. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to
25 knots. Chance of showers in the evening. Slight chance of
thunderstorms through the night. Showers likely after midnight.
Waves 1 to 2 feet.

$$

LSZ147-291600-
Sand Island to Bayfield WI-
1202 AM CDT Sat Aug 29 2026

.TODAY...Southeast wind 5 knots becoming east late in the
afternoon. Chance of showers and slight chance of thunderstorms
until late afternoon. Slight chance of showers late in the
afternoon. Waves 1 foot or less.
.TONIGHT...East wind 5 knots. Patchy fog after midnight. Waves
1 foot or less.
.SUNDAY...Northeast wind 5 to 10 knots. Gusts up to 20 knots in
the afternoon. Chance of showers in the afternoon. Waves 1 to
2 feet.
.SUNDAY NIGHT...East wind 5 to 10 knots. Gusts up to 20 knots in
the evening. Chance of showers through the night. Slight chance
of thunderstorms after midnight. Waves 1 to 2 feet.

$$

LSZ150-291600-
Outer Apostle Islands Beyond 5 NM from Mainland-
1202 AM CDT Sat Aug 29 2026

.TODAY...Southeast wind 5 knots becoming east late in the
afternoon. Chance of showers and slight chance of thunderstorms
until late afternoon, then slight chance of showers late in the
afternoon. Waves 1 foot or less.
.TONIGHT...East wind 5 knots. Mostly cloudy. Waves 1 foot or
less.
.SUNDAY...Northeast wind 10 to 15 knots. Gusts up to 25 knots.
Chance of showers in the afternoon. Waves 1 to 2 feet.
.SUNDAY NIGHT...East wind 10 to 15 knots. Gusts up to 25 knots.
Chance of showers through the night. Slight chance of
thunderstorms after midnight. Waves 1 to 3 feet.

$$

LSZ121-291600-
Chequamegon Bay-Bayfield to Oak Point WI-
1202 AM CDT Sat Aug 29 2026

.TODAY...South wind 5 knots. Chance of rain showers and slight
chance of thunderstorms until late afternoon, then slight chance
of rain showers late in the afternoon. Waves 1 foot or less.
.TONIGHT...Southeast wind 5 knots becoming east after midnight.
Patchy fog after midnight. Waves 1 foot or less.
.SUNDAY...Northeast wind 5 to 10 knots. Gusts up to 20 knots late
in the afternoon. Slight chance of showers in the morning. Chance
of showers in the afternoon. Waves 1 foot or less.
.SUNDAY NIGHT...Northeast wind 5 to 10 knots with gusts to around
20 knots becoming east early in the morning. Chance of showers
through the night. Slight chance of thunderstorms after midnight.
Waves 1 foot or less.

$$

LSZ148-291600-
Oak Point to Saxon Harbor WI-
1202 AM CDT Sat Aug 29 2026

.TODAY...South wind 5 knots becoming southeast late in the
afternoon. Chance of rain showers and slight chance of
thunderstorms until late afternoon, then slight chance of rain
showers late in the afternoon. Waves 1 foot or less.
.TONIGHT...Southeast wind 5 knots becoming east early in the
morning. Mostly cloudy. Waves 1 foot or less.
.SUNDAY...Northeast wind 10 to 15 knots with gusts to around
20 knots. Slight chance of showers in the morning. Chance of
showers in the afternoon. Waves 1 to 2 feet.
.SUNDAY NIGHT...Northeast wind 10 to 15 knots with gusts to
around 20 knots becoming east 5 knots after midnight. Chance of
showers through the night. Slight chance of thunderstorms after
midnight. Waves 1 to 2 feet.

$$

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

WFO DLH

Open Waters Forecast

428
FZUS63 KMQT 290201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Fri Aug 28 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...

30.1 inch ridging over the Great Lakes breaks down Saturday as the
parent high currently centered over Pennsylvania continues to move
offshore. Saturday night, a low pressure over the Central to
Northern Plains deepens to 29.6 inches. This low lifts north into
the Canadian Prairies early next week, with heights over Lake
Superior subsequently falling to 29.8 inches by Monday afternoon.
Weak high pressure ridging of at least 29.8 inches returns to Lake
Superior by Tuesday.



LSZ162-290800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Fri Aug 28 2026 /901 PM CDT Fri Aug 28 2026/

.REST OF TONIGHT...East winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A slight chance of showers by mid
afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Northeast winds 15 to 25 knots veering east after
midnight. A chance of showers and a slight chance of
thunderstorms. Waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.
.MONDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing northeast.
Waves calm to 2 feet.

$$

LSZ263-290800-
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 PM EDT Fri Aug 28 2026

.REST OF TONIGHT...Southeast winds 5 to 15 knots veering south
late. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming east
less than 10 knots late. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots. A chance of showers. A
slight chance of thunderstorms after midnight. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...East winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. A chance of showers. Waves building to 1 to
3 feet.
.MONDAY NIGHT...West winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing south. Waves calm
to 2 feet.

$$

LSZ264-290800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Fri Aug 28 2026

.REST OF TONIGHT...South winds 5 to 15 knots becoming southwest
less than 10 knots late. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast in the
afternoon, then diminishing to less than 10 knots late. A slight
chance of showers by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds less than 10 knots increasing
to 5 to 15 knots after midnight, then becoming east less than
10 knots late. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers. A slight chance of
thunderstorms after midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots. A chance of showers
through early afternoon. Showers likely by mid afternoon. Waves
building to 2 to 4 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots veering west after
midnight. A chance of showers. Waves subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 10 to 20 knots veering west. Waves
calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots diminishing to less than
10 knots. Waves calm to 2 feet.

$$

LSZ265-290800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Fri Aug 28 2026

.REST OF TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. 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. A chance of
showers and a slight chance of thunderstorms by mid afternoon.
Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots veering southeast after
midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots. A chance of showers.
Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.MONDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. A chance of showers. Waves subsiding to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ266-290800-
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 PM EDT Fri Aug 28 2026

.REST OF TONIGHT...South winds 5 to 15 knots. 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. A chance of
showers and a slight chance of thunderstorms by mid afternoon.
Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots veering southeast after
midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots. A chance of showers.
Waves building to 2 to 4 feet.
.MONDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers. Waves subsiding to calm to
2 feet.
.TUESDAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.

$$

LSZ267-290800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Fri Aug 28 2026

.REST OF TONIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast in the
afternoon. A slight chance of showers by mid afternoon. Waves
calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots late. A slight chance of thunderstorms through midnight.
A slight chance of showers. Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots veering southeast after
midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of showers. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight. A chance of showers. Waves subsiding to calm to
2 feet.
.TUESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.

$$

LSZ261-290800-
MAFOR 2903/
Superior West 13200 14300 11200. A chance of showers Saturday
afternoon. Waves 1 foot or less.

Superior North Central 11410 12500 11400 14300. Waves 1 foot or
less.

Superior South Central 11410 13400 11300 12310 11410. A chance of
showers Saturday afternoon and Saturday evening. Waves 2 feet or
less.

Superior East 12400 11300 12400 12300 11410. 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

392
FZUS53 KDLH 280942
SRFDLH

Surf Zone Forecast
National Weather Service Duluth MN
442 AM CDT Fri Aug 28 2026

MNZ037-WIZ001-290345-
Carlton/Southern St. Louis-Douglas-
Including the beaches of Minnesota/Park Point and Wisconsin Point
442 AM CDT Fri Aug 28 2026

.TODAY...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
UV Index**..................High.
Water Temperature...........In the mid 60s.
Weather.....................Sunny. Patchy fog through 8 AM.
High Temperature............In the lower 70s.
Winds.......................Northeast winds around 5 mph.
Sunrise.....................6:23 AM.
Sunset......................7:57 PM.

.SATURDAY...
Swim Risk*..................Low.
Wave Height.................1 foot or less.
Weather.....................Mostly cloudy. Showers likely.
High Temperature............In the mid 70s.
Winds.......................East winds 5 to 10 mph.
Sunrise.....................6:24 AM.
Sunset......................7:55 PM.

.SUNDAY...Wave height 1 to 3 feet. Mostly cloudy. A chance of
showers. Highs in the upper 60s. Northeast winds around 15 mph.
.MONDAY...Wave height around 2 feet. Mostly cloudy. A slight chance
of showers and thunderstorms. Highs in the mid 70s. Northeast winds
around 10 mph.
.TUESDAY...Wave height 1 foot or less. Mostly sunny. Highs in the
upper 70s. Southwest 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