Marine Weather, NWS WFO Duluth, MN

Nearshore Forecast

946
FZUS53 KDLH 291718
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
1218 PM CDT Wed Apr 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.

LSZ140-292200-
Grand Portage to Grand Marais MN-
1218 PM CDT Wed Apr 29 2026

.REST OF TODAY...Southeast wind 5 to 10 knots becoming south
late. Chance of rain and snow. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots becoming north after
midnight. Chance of rain and snow in the evening, then chance of
flurries and slight chance of rain after midnight. Waves 1 foot
or less.
.THURSDAY...North wind 5 to 10 knots becoming southeast early in
the afternoon, then becoming southwest late in the afternoon.
Slight chance of snow in the morning, then chance of snow in the
afternoon. Waves 1 foot or less.
.THURSDAY NIGHT...West wind 5 to 10 knots becoming north in the
late evening and overnight. Chance of snow in the evening. Waves
1 foot or less.

$$

LSZ141-292200-
Grand Marais to Taconite Harbor MN-
1218 PM CDT Wed Apr 29 2026

.REST OF TODAY...West wind 5 to 10 knots becoming south late.
Chance of rain and snow. Waves 1 foot or less.
.TONIGHT...Southwest wind 5 knots becoming north early in the
morning. Chance of rain in the evening, then chance of flurries
and slight chance of rain after midnight. Waves 1 foot or less.
.THURSDAY...North wind 5 knots becoming southwest in the
afternoon. Chance of sprinkles and flurries in the morning, then
chance of snow and rain in the afternoon. Waves 1 foot or less.
.THURSDAY NIGHT...West wind 5 knots becoming north in the late
evening and overnight. Slight chance of rain and snow in the
evening. Waves 1 foot or less.

$$

LSZ142-292200-
Taconite Harbor to Silver Bay Harbor MN-
1218 PM CDT Wed Apr 29 2026

.REST OF TODAY...West wind 5 knots. Chance of rain. Waves 1 foot
or less.
.TONIGHT...Southwest wind 5 knots becoming northwest in the late
evening and early morning, then becoming north early in the
morning. Chance of sprinkles through the night. Chance of
flurries after midnight. Waves 1 foot or less.
.THURSDAY...North wind 5 knots becoming south early in the
afternoon, then becoming southwest late in the afternoon. Chance
of sprinkles and flurries in the morning, then chance of snow in
the afternoon. Waves 1 foot or less.
.THURSDAY NIGHT...West wind 5 knots becoming north in the late
evening and overnight. Slight chance of rain and snow in the
evening. Waves 1 foot or less.

$$

LSZ143-292200-
Silver Bay Harbor to Two Harbors MN-
1218 PM CDT Wed Apr 29 2026

.REST OF TODAY...West wind 5 knots becoming south late. Slight
chance of rain early in the afternoon, then chance of rain late.
Waves 1 foot or less.
.TONIGHT...Southwest wind 5 to 10 knots becoming northwest in the
late evening and overnight. Chance of sprinkles and flurries
through the night. Waves 1 foot or less.
.THURSDAY...North wind 5 knots becoming south in the afternoon.
Chance of snow and rain in the afternoon. Waves 1 foot or less.
.THURSDAY NIGHT...Southwest wind 5 knots becoming north in the
late evening and overnight. Slight chance of rain in the evening.
Waves 1 foot or less.

$$

LSZ144-292200-
Two Harbors to Duluth MN-
1218 PM CDT Wed Apr 29 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...

.REST OF TODAY...West wind 10 to 15 knots with gusts to around
20 knots. Chance of sprinkles early in the afternoon, then chance
of rain late. Waves 1 foot or less.
.TONIGHT...West wind 5 to 10 knots becoming northwest in the late
evening and overnight. Chance of sprinkles in the evening. Waves
1 foot or less.
.THURSDAY...North wind 5 to 10 knots becoming east in the
afternoon. Slight chance of rain in the afternoon. Waves 1 foot
or less.
.THURSDAY NIGHT...North wind 5 knots. Chance of sprinkles through
the night. Waves 1 foot or less.

$$

LSZ145-292200-
Duluth MN to Port Wing WI-
1218 PM CDT Wed Apr 29 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...

.REST OF TODAY...Northwest wind 10 to 15 knots with gusts to
around 20 knots. Chance of sprinkles through the day. Waves
1 foot or less.
.TONIGHT...Northwest wind 5 to 10 knots. Chance of sprinkles in
the evening. Waves 1 foot or less.
.THURSDAY...North wind 5 to 10 knots becoming northeast late in
the afternoon. Chance of sprinkles and slight chance of snow in
the afternoon. Waves 1 foot or less.
.THURSDAY NIGHT...North wind 5 knots. Chance of sprinkles through
the night. Waves 1 foot or less.

$$

LSZ146-292200-
Port Wing to Sand Island WI-
1218 PM CDT Wed Apr 29 2026

.REST OF TODAY...West wind 5 to 10 knots. Chance of sprinkles
early in the afternoon, then chance of rain late. Waves 1 foot or
less.
.TONIGHT...West wind 5 knots becoming northwest after midnight.
Chance of sprinkles and flurries through the night. Waves 1 foot
or less.
.THURSDAY...North wind 5 knots becoming northeast early in the
afternoon, then becoming west late in the afternoon. Chance of
flurries in the morning. Chance of sprinkles through the day.
Slight chance of snow in the afternoon. Waves 1 foot or less.
.THURSDAY NIGHT...West wind 5 knots becoming north in the late
evening and overnight. Chance of sprinkles in the evening. Waves
1 foot or less.

$$

LSZ147-292200-
Sand Island to Bayfield WI-
1218 PM CDT Wed Apr 29 2026

.REST OF TODAY...Northwest wind 5 to 10 knots. Chance of
sprinkles early in the afternoon, then slight chance of rain
late. Waves 1 foot or less.
.TONIGHT...Northwest wind 5 to 10 knots easing to 5 knots early
in the morning. Chance of sprinkles and flurries through the
night. Waves 1 foot or less.
.THURSDAY...North wind 5 knots becoming northeast early in the
afternoon, then becoming west late in the afternoon. Chance of
flurries in the morning. Chance of sprinkles through the day.
Slight chance of snow in the afternoon. Waves 1 foot or less.
.THURSDAY NIGHT...West wind 5 knots becoming north early in the
morning. Chance of sprinkles and flurries in the evening. Waves
1 foot or less.

$$

LSZ150-292200-
Outer Apostle Islands Beyond 5 NM from Mainland-
1218 PM CDT Wed Apr 29 2026

.REST OF TODAY...Northwest wind 10 to 15 knots. Chance of
sprinkles. Waves 1 foot or less.
.TONIGHT...Northwest wind 5 to 10 knots becoming north early in
the morning. Chance of sprinkles through the night. Chance of
flurries after midnight. Waves 1 foot or less.
.THURSDAY...North wind 5 knots becoming southwest late in the
afternoon. Chance of sprinkles and flurries through the day.
Waves 1 foot or less.
.THURSDAY NIGHT...West wind 5 knots becoming north early in the
morning. Chance of sprinkles and slight chance of snow in the
evening. Waves 1 foot or less.

$$

LSZ121-292200-
Chequamegon Bay-Bayfield to Oak Point WI-
1218 PM CDT Wed Apr 29 2026

.REST OF TODAY...Northwest wind 10 to 15 knots. Gusts up to
20 knots late. Chance of sprinkles early in the afternoon, then
slight chance of rain late. Waves 1 foot or less.
.TONIGHT...Northwest wind 5 knots. Chance of sprinkles through
the night. Chance of flurries after midnight. Waves 1 foot or
less.
.THURSDAY...North wind 5 knots becoming northeast in the
afternoon. Chance of flurries in the morning. Chance of sprinkles
through the day. Slight chance of snow in the afternoon. Waves
1 foot or less.
.THURSDAY NIGHT...North wind 5 knots early in the evening
becoming variable 10 knots or less, then becoming northwest
5 knots after midnight. Chance of sprinkles and flurries through
the night. Waves 1 foot or less.

$$

LSZ148-292200-
Oak Point to Saxon Harbor WI-
1218 PM CDT Wed Apr 29 2026

.REST OF TODAY...North wind 10 to 15 knots. Chance of sprinkles
through the day. Waves 1 foot or less.
.TONIGHT...Northwest wind 5 knots. Chance of sprinkles through
the night. Chance of flurries after midnight. Waves 1 foot or
less.
.THURSDAY...North wind 5 to 10 knots becoming northeast in the
afternoon. Chance of flurries in the morning. Chance of sprinkles
through the day. Slight chance of snow in the afternoon. Waves
1 foot or less.
.THURSDAY NIGHT...Northeast wind 5 knots becoming northwest in
the late evening and overnight. Chance of sprinkles and flurries
through the night. Waves 1 foot or less.

$$

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

WFO DLH

Open Waters Forecast

784
FZUS63 KMQT 291402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Wed Apr 29 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 ridging of 30.0 inches over Lake Superior this morning persists
between 30.0 and 30.1 inches through early Saturday as a 30.3 inch
high slowly shifts east from the Canadian Prairies to northwest
Ontario and Hudson Bay. Weak troughing of 29.8 inches moves over the
lake Saturday night and strengthens to 29.5 inches through Monday as
the parent low pressure deepens to 29.4 inches over northern Ontario
and James Bay.


LSZ162-292000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Wed Apr 29 2026 /901 AM CDT Wed Apr 29 2026/

.REST OF TODAY...West winds 5 to 15 knots backing southwest in
the afternoon, then veering west late. A slight chance of rain
showers. A chance of snow showers by mid afternoon. Waves calm to
2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight. A slight chance of rain and snow showers through
midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering west. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.

$$

LSZ263-292000-
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 Apr 29 2026

.REST OF TODAY...North winds less than 10 knots becoming west
5 to 15 knots in the afternoon, then diminishing to less than
10 knots late. A slight chance of rain showers. A slight chance
of snow showers by mid afternoon. Waves calm to 2 feet.
.TONIGHT...North winds less than 10 knots increasing to 5 to
15 knots after midnight. A slight chance of rain and snow showers
through midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing west late. Waves
calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots veering west. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.

$$

LSZ264-292000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EDT Wed Apr 29 2026

.REST OF TODAY...North winds less than 10 knots backing northwest
in the afternoon, then becoming west 5 to 15 knots late. Waves
calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight. A slight chance of rain and snow showers through
midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest late.
Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.

$$

LSZ265-292000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EDT Wed Apr 29 2026

.REST OF TODAY...Northwest winds 10 to 20 knots veering north in
the afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots backing northwest after
midnight, then becoming north 10 to 20 knots late. Waves calm to
2 feet.
.THURSDAY...North winds 10 to 20 knots. Waves building to 1 to
3 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet, then building to 1 to 3 feet.
.FRIDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves subsiding to calm to 2 feet,
then building to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west. Waves
subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ266-292000-
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 Apr 29 2026

.REST OF TODAY...Northwest winds 10 to 20 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north late.
Waves calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots becoming northwest 15 to
25 knots late. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots veering north
after midnight. Waves 2 to 4 feet.
.FRIDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots. Waves subsiding
to 2 to 4 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-292000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EDT Wed Apr 29 2026

.REST OF TODAY...Northwest winds 10 to 20 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north late.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.THURSDAY...North winds 10 to 20 knots backing northwest in the
afternoon, then increasing to 15 to 25 knots late. Waves building
to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.FRIDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.SUNDAY...West winds 10 to 20 knots veering northwest. Waves
subsiding to calm to 2 feet.

$$

LSZ261-292000-
MAFOR 2915/
Superior West 11600 11500 11600 11700 14800. Waves 1 foot or
less.

Superior North Central 14700 11710 13810. Waves 2 feet or less.

Superior South Central 11700 12800 11810 12710 11810 11820. Waves
2 feet or less.

Superior East 11700 14710 11710 12810. Waves 1 to 3 feet.

$$

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