Marine Weather, NWS WFO Duluth, MN

Nearshore Forecast

315
FZUS53 KDLH 191243
NSHDLH

Nearshore Marine Forecast
National Weather Service Duluth MN
743 AM CDT Mon Oct 19 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.

LSZ140-191600-
Grand Portage to Grand Marais MN-
743 AM CDT Mon Oct 19 2026

.TODAY...Northeast wind 5 to 10 knots becoming east in the
afternoon. Sunny. Waves 1 to 2 feet.
.TONIGHT...Northeast wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.TUESDAY...East wind 5 to 10 knots becoming southeast in the
afternoon. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...Southeast wind 5 knots becoming southwest in the
late evening and overnight. Mostly clear. Waves 1 to 2 feet.

$$

LSZ141-191600-
Grand Marais to Taconite Harbor MN-
743 AM CDT Mon Oct 19 2026

.TODAY...North wind 5 to 10 knots becoming east in the afternoon.
Sunny. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 to 10 knots. Clear. Waves 1 foot or
less.
.TUESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...Northeast wind 5 knots becoming southwest after
midnight. Partly cloudy. Waves 1 foot or less.

$$

LSZ142-191600-
Taconite Harbor to Silver Bay Harbor MN-
743 AM CDT Mon Oct 19 2026

.TODAY...North wind 5 to 10 knots becoming northeast in the
afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.TUESDAY...East wind 5 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...Northeast wind 5 knots early in the evening
becoming variable 10 knots or less, then becoming west 5 knots
after midnight. Partly cloudy. Waves 1 foot or less.

$$

LSZ143-191600-
Silver Bay Harbor to Two Harbors MN-
743 AM CDT Mon Oct 19 2026

.TODAY...North wind 5 knots becoming northeast in the late
morning and afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...Northeast wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.
.TUESDAY...East wind 5 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...Northeast wind 5 knots becoming southwest after
midnight. Mostly clear. Waves 1 foot or less.

$$

LSZ144-191600-
Two Harbors to Duluth MN-
743 AM CDT Mon Oct 19 2026

.TODAY...North wind 5 knots becoming northeast 10 to 15 knots
with gusts to around 20 knots in the late morning and afternoon.
Sunny. Waves 1 to 2 feet.
.TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots
early in the evening. Mostly clear. Waves 1 to 2 feet.
.TUESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...East wind 5 knots becoming southwest after
midnight. Mostly clear. Waves 1 foot or less.

$$

LSZ145-191600-
Duluth MN to Port Wing WI-
743 AM CDT Mon Oct 19 2026

.TODAY...South wind 5 knots becoming northeast 10 to 15 knots
with gusts to around 20 knots in the late morning and afternoon.
Sunny. Waves 1 to 2 feet.
.TONIGHT...East wind 10 to 15 knots. Gusts up to 20 knots early
in the evening. Mostly clear. Waves 1 to 2 feet.
.TUESDAY...East wind 5 to 10 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...Southeast wind 5 knots becoming south in the
late evening and overnight. Mostly clear. Waves 1 foot or less.

$$

LSZ146-191600-
Port Wing to Sand Island WI-
743 AM CDT Mon Oct 19 2026

.TODAY...West wind 5 knots becoming northeast with gusts to
around 20 knots in the late morning and afternoon. Sunny. Waves
1 foot or less.
.TONIGHT...East wind 5 to 10 knots easing to 5 knots early in the
morning. Mostly clear. Waves 1 foot or less.
.TUESDAY...Southeast wind 5 knots becoming northeast in the
afternoon. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...Southeast wind 5 knots becoming southwest in the
late evening and overnight. Mostly clear. Waves 1 foot or less.

$$

LSZ147-191600-
Sand Island to Bayfield WI-
743 AM CDT Mon Oct 19 2026

.TODAY...North wind 5 knots becoming northeast in the late
morning and afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...East wind 5 to 10 knots becoming southeast early in
the morning. Mostly clear. Waves 1 foot or less.
.TUESDAY...Southeast wind 5 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...South wind 5 knots becoming southwest after
midnight. Mostly clear. Waves 1 foot or less.

$$

LSZ150-191600-
Outer Apostle Islands Beyond 5 NM from Mainland-
743 AM CDT Mon Oct 19 2026

.TODAY...Northwest wind 5 knots becoming northeast in the late
morning and afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...East wind 5 to 10 knots becoming southeast early in
the morning. Mostly clear. Waves 1 to 2 feet.
.TUESDAY...Southeast wind 5 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...Southeast wind 5 knots becoming south in the
late evening and overnight. Mostly clear. Waves 1 foot or less.

$$

LSZ121-191600-
Chequamegon Bay-Bayfield to Oak Point WI-
743 AM CDT Mon Oct 19 2026

.TODAY...Southwest wind 5 knots becoming northeast in the late
morning and afternoon. Sunny. Waves 1 foot or less.
.TONIGHT...East wind 5 to 10 knots becoming southeast early in
the morning. Mostly clear. Waves 1 foot or less.
.TUESDAY...South wind 5 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...South wind 5 knots. Mostly clear. Waves 1 foot
or less.

$$

LSZ148-191600-
Oak Point to Saxon Harbor WI-
743 AM CDT Mon Oct 19 2026

.TODAY...Southwest wind 5 knots becoming northeast in the late
morning and afternoon. Sunny. Waves 1 to 2 feet.
.TONIGHT...East wind 5 to 10 knots becoming southeast after
midnight. Mostly clear. Waves 1 to 2 feet.
.TUESDAY...South wind 5 knots. Sunny. Waves 1 foot or less.
.TUESDAY NIGHT...South wind 5 to 10 knots. Mostly clear. Waves
1 foot or less.

$$

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

WFO DLH

Open Waters Forecast

172
FZUS63 KMQT 191401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EDT Mon Oct 19 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...

This morning, Lake Superior is between a 30.6 inch high over Nova
Scotia, a 30.3 inch high over North Dakota, and a 29.3 inch low over
Hudson Bay. Throughout the day today, all features march east, with
the Plains high shifting over Lake Superior at 30.4 inches. This
high builds further to 30.5 inches over western Quebec Tuesday
afternoon as a 29.9 inch low moves from northern Manitoba into
western Hudson Bay. Wednesday morning, the high weakens lightly to
30.4 inches but expands over much of southern Quebec while the low
deepens to 29.7 inches over eastern Hudson Bay. Meanwhile, a 30.3
inch high moves over the North Dakota/Manitoba/Saskatchewan
tripoint. With the low moving across northern Quebec, the highs
merge into a 30.3 inch high over the Upper Great Lakes by Thursday
morning. By Friday afternoon, the high builds to 30.5 inches over
the Ontario/Quebec line as a 29.4 inch low moves into eastern
Montana. Saturday afternoon, the high builds further to 30.6 inches
over New England as the 29.4 inch low approaches Lake Winnipeg.



LSZ162-192000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EDT Mon Oct 19 2026 /900 AM CDT Mon Oct 19 2026/

.REST OF TODAY...North winds 5 to 15 knots veering northeast in
the afternoon, then increasing to 10 to 20 knots late. Waves calm
to 2 feet.
.TONIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots backing east late. Waves
calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering west by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds less than 10 knots increasing
to 5 to 15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots diminishing to 5 to
15 knots. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Waves building to 2 to 4 feet.

$$

LSZ263-192000-
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 Mon Oct 19 2026

.REST OF TODAY...North winds less than 10 knots becoming
northeast 5 to 15 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast late. Waves
calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots backing east late. Waves
calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering west by mid
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds less than 10 knots becoming
east 5 to 15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.
.FRIDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ264-192000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EDT Mon Oct 19 2026

.REST OF TODAY...Northwest winds less than 10 knots becoming
north 5 to 15 knots late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast late. Waves
calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...North winds less than 10 knots veering
northeast after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.
.FRIDAY...South winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.

$$

LSZ265-192000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EDT Mon Oct 19 2026

.REST OF TODAY...North winds 5 to 15 knots becoming northeast
10 to 20 knots late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast late. Waves
calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots late. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves calm to 2 feet.
.FRIDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ266-192000-
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 Mon Oct 19 2026

.REST OF TODAY...North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves 1 to 3 feet subsiding to calm to
2 feet.
.TONIGHT...Northeast winds less than 10 knots becoming east 5 to
15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots veering northeast
after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves calm to 2 feet.
.FRIDAY...South winds 15 to 25 knots increasing to gales to
35 knots. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ267-192000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EDT Mon Oct 19 2026

.REST OF TODAY...Northwest winds 10 to 20 knots veering north in
the afternoon. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots veering east after midnight,
then increasing to 10 to 20 knots late. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. Waves building to
1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots veering
northeast after midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots veering southeast.
Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Waves building to 2 to 4 feet.

$$

LSZ261-192000-
MAFOR 1915/
Superior West 12100 11110 13210 12310. Waves 2 feet or less.

Superior North Central 11700 12800 11100 11200 12300 11310. Waves
2 feet or less.

Superior South Central 11810 11800 12100 12200 11300 11310. Waves
1 foot or less.

Superior East 11710 13800 11100 11200 11210 11310. 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