831
FZUS63 KMQT 100801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 AM EDT Sun May 10 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...

Heights continue to rise over Lake Superior today as a 30.2 inch
high pressure over the Canadian Prairies expands eastward. The high
shifts southeast into the Upper Great Lakes at 30.3 inches tonight
and Monday morning. Ridging from the high persists at around 30.2
inches over Lake Superior through Monday evening before eventually
being replaced by a 29.7 inch Clipper descending over western Lake
Superior on Tuesday. As the Clipper continues eastward Tuesday night
into 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 on Thursday while a 29.4 inch low
emanates off the Northern Rockies.


LSZ162-102000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Sun May 10 2026 /301 AM CDT Sun May 10 2026/

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight, then diminishing to less than 10 knots late. Waves calm
to 2 feet.
.MONDAY...North winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Rain showers likely after midnight.
Waves building to 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering northwest by
mid afternoon. Rain showers. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing southwest.
Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots becoming south 10 to
20 knots. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.

$$

LSZ263-102000-
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 Sun May 10 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves 1 to
3 feet.
.TODAY...Northwest winds 5 to 15 knots backing west in the
afternoon. A chance of rain showers by mid afternoon. Waves
subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering north after midnight,
then diminishing to less than 10 knots late. Waves calm to
2 feet.
.MONDAY...Northwest winds less than 10 knots becoming south 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots. A chance of rain
showers, possibly mixed with snow after midnight. Waves building
to 2 to 4 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering west by mid
afternoon. Rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots increasing to 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.

$$

LSZ264-102000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EDT Sun May 10 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves 1 to
3 feet.
.TODAY...Northwest winds 5 to 15 knots backing west late. A
chance of rain showers. A chance of snow showers by mid
afternoon. Waves subsiding to calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering north late. Waves
calm to 2 feet.
.MONDAY...Northwest winds less than 10 knots becoming south 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots. Waves building to
2 to 4 feet.
.TUESDAY...Southeast winds 20 to 30 knots. Rain showers. Waves
building to 5 to 9 feet occasionally to 11 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of rain showers. Waves
subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ265-102000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EDT Sun May 10 2026

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 10 to 20 knots. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots veering east in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Southeast winds 20 to 30 knots. Rain showers. Waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots becoming northwest
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...Northwest gales to 35 knots becoming west 10 to
20 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then 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.

$$

LSZ266-102000-
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 Sun May 10 2026

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Waves 2 to
4 feet.
.TODAY...Northwest winds 15 to 25 knots. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north late.
Waves subsiding to 1 to 3 feet.
.MONDAY...Northwest winds 5 to 15 knots becoming east less than
10 knots late. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots becoming south
15 to 25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...South winds 20 to 30 knots backing southeast by mid
afternoon. Rain showers. Waves building to 5 to 9 feet
occasionally to 11 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
5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots. Waves building to 7 to 10 feet occasionally to 13 feet,
then 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.

$$

LSZ267-102000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EDT Sun May 10 2026

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TODAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to 1 to 3 feet.
.MONDAY...Northwest winds 5 to 15 knots backing west late. Waves
subsiding to calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.TUESDAY...Southeast winds 15 to 25 knots. 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 1 to
3 feet, then building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 1 to 3 feet.
.THURSDAY...South winds 5 to 15 knots increasing to 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.

$$

LSZ261-101400-
MAFOR 1009/
Superior West 13710 12610 11600 11700 11800. Waves 2 feet or
less.

Superior North Central 13710 13610 11710 11700. Waves 1 to 2
feet.

Superior South Central 15720 11720 11710. Waves 1 to 3 feet
today. Waves 2 feet or less tonight.

Superior East 14720 13730 11720. Waves 2 to 4 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