769
FZUS63 KMQT 110802
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 AM EDT Mon May 11 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...

A 30.3 inch high continues over the Upper Great Lakes today before
departing for the Lower Great Lakes this evening. Behind it, a 29.6
inch Clipper descends over far western Lake Superior on Tuesday. As
the Clipper continues eastward towards the St. Lawrence Seaway
Tuesday night and Wednesday, 30.1 inch high pressure ridging moves
back over Lake Superior late in the day on Wednesday. This ridging
is pressed southeast to the Lower Great Lakes Thursday into Friday
while a 29.1 inch low emanates off the Northern Rockies. This low is
expected to bring troughing of 29.6 inches over Lake Superior on
Friday.


LSZ162-112000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Mon May 11 2026 /301 AM CDT Mon May 11 2026/

.EARLY THIS MORNING...North winds less than 10 knots. Waves calm
to 2 feet.
.TODAY...North winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots. Rain showers likely and a
slight chance of thunderstorms after midnight. Waves building to
1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering northwest late.
A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. A slight chance of rain showers through midnight.
Waves 1 to 3 feet.
.WEDNESDAY...Northwest 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 diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots becoming south 15 to
25 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.FRIDAY...South winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain showers. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.

$$

LSZ263-112000-
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-
401 AM EDT Mon May 11 2026

.EARLY THIS MORNING...North winds less than 10 knots. Waves calm
to 2 feet.
.TODAY...North winds less than 10 knots becoming south 5 to
15 knots in the afternoon, then backing east late. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then veering south late. A chance of
rain showers after midnight. Waves building to 2 to 4 feet.
.TUESDAY...Southeast winds 15 to 25 knots becoming west 10 to
20 knots late. Rain showers through early afternoon, then a
chance of rain showers by mid afternoon. Waves building to 3 to
6 feet occasionally to 8 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots. A slight chance of
snow showers through midnight. A slight chance of rain showers.
Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots becoming south
less than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots becoming south 15 to
25 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...South winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain showers. Waves subsiding to 2 to
4 feet.

$$

LSZ264-112000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EDT Mon May 11 2026

...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...

.EARLY THIS MORNING...Northwest winds less than 10 knots. Waves
calm to 2 feet.
.TODAY...Northwest winds less than 10 knots becoming south 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then becoming south 15 to 25 knots late.
Waves building to 2 to 4 feet.
.TUESDAY...South winds 20 to 30 knots becoming southeast gales to
35 knots in the afternoon, then diminishing to 20 to 30 knots
late. Rain showers through early afternoon, then a chance of rain
showers by mid afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of snow showers through
midnight. A chance of rain showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming south 15 to
25 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...South winds 20 to 30 knots becoming north 10 to
20 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.

$$

LSZ265-112000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EDT Mon May 11 2026

...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY
AFTERNOON...

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 5 to 15 knots veering east in the
afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then veering south late. Waves building
to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...South winds 20 to 30 knots becoming southeast gales to
35 knots in the afternoon, then diminishing to 20 to 30 knots
late. Rain showers through early afternoon, then a chance of rain
showers by mid afternoon. Waves building to 4 to 8 feet
occasionally to 10 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. A chance of rain showers. Waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...Northwest gales to 35 knots. A chance of rain
showers through early afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots becoming south 20 to
30 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Southeast winds 20 to 30 knots becoming north 15 to
25 knots. A chance of rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet.

$$

LSZ266-112000-
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-
401 AM EDT Mon May 11 2026

...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY
AFTERNOON...

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TODAY...Northwest winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming south 5 to 15 knots
late. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then increasing to 20 to 30 knots late.
Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...South gales to 35 knots backing southeast in the
afternoon, then diminishing to 20 to 30 knots late. Rain showers.
Waves building to 5 to 8 feet occasionally to 10 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots becoming north
20 to 30 knots after midnight. A chance of rain showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
4 to 7 feet occasionally to 9 feet.
.WEDNESDAY...North gales to 35 knots backing northwest by mid
afternoon. A chance of rain showers through early afternoon.
Waves building to 5 to 9 feet occasionally to 11 feet.
.WEDNESDAY NIGHT...Northwest winds 20 to 30 knots becoming north
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming south 20 to
30 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South gales to 35 knots diminishing to 15 to 25 knots.
A chance of rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ267-112000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EDT Mon May 11 2026

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TODAY...Northwest winds 5 to 15 knots backing west late. Waves
calm to 2 feet.
.TONIGHT...South winds less than 10 knots becoming southeast 5 to
15 knots after midnight, then becoming south 10 to 20 knots late.
Waves calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of rain showers through early
afternoon, then rain showers by mid afternoon. Waves building to
3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots backing north
after midnight. Rain showers likely through midnight, then a
chance of rain showers after midnight. Waves subsiding to 2 to
4 feet.
.WEDNESDAY...North winds 20 to 30 knots backing northwest by mid
afternoon. A chance of rain showers through early afternoon.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northwest winds 5 to 15 knots becoming south 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.FRIDAY...South winds 15 to 25 knots. A chance of rain showers.
Waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 1 to 3 feet.

$$

LSZ261-111400-
MAFOR 1109/
Superior West 12100 12300 12310 12320. Waves 1 foot or less
today. Waves 1 to 3 feet tonight.

Superior North Central 12700 11600 11500 11400 11310 12320. Waves
1 foot or less today. Waves 1 to 3 feet tonight.

Superior South Central 11710 12700 11100 11310 12320 11430. Waves
1 foot or less today. Waves 2 feet or less building to 2 to 4
feet tonight.

Superior East 11810 12700 12600 11400 11310 11320. Waves 1 to 3
feet today. Waves 2 feet or less tonight.

$$

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