185
FZUS63 KMQT 110201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM 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...

A 30.2 inch high over Manitoba continues to stretch 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 Thursday into Friday while a 29.4 inch low emanates off the
Northern Rockies. Troughing of 29.7 inches moves over the lake on
Friday.


LSZ162-110800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Sun May 10 2026 /901 PM CDT Sun May 10 2026/

.REST OF TONIGHT...North winds 5 to 15 knots veering northeast
late. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots veering southeast 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 through early afternoon, then a
chance of rain showers by mid afternoon. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West 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 10 to
20 knots. A chance of rain showers. Waves building to 2 to
4 feet.
.FRIDAY...East winds 10 to 20 knots backing northeast. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.

$$

LSZ263-110800-
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 Sun May 10 2026

.REST OF TONIGHT...Northwest winds less than 10 knots veering
north after midnight. Waves calm to 2 feet.
.MONDAY...North winds less than 10 knots becoming south 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots late. A chance of rain showers after midnight. Waves
building to 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering west by mid
afternoon. Rain showers through early afternoon, then a chance of
rain showers by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to 2 to 4 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...West winds 5 to 15 knots becoming south less
than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...East winds 10 to 20 knots becoming northeast 5 to
15 knots. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.

$$

LSZ264-110800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Sun May 10 2026

.REST OF TONIGHT...Northwest 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 5 to 15 knots increasing to 10 to
20 knots late. Waves building to 2 to 4 feet.
.TUESDAY...Southeast winds 20 to 30 knots. Rain showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots. A chance of rain
showers. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. 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.
.FRIDAY...East winds 15 to 25 knots becoming northeast 10 to
20 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet.

$$

LSZ265-110800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Sun May 10 2026

.REST OF 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 becoming south
15 to 25 knots late. Waves building to 2 to 4 feet.
.TUESDAY...South winds 20 to 30 knots backing southeast by mid
afternoon. Rain showers. Waves building to 4 to 8 feet
occasionally to 10 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 2 to 4 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots. A chance of rain
showers through early afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots becoming west
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...South winds 20 to 30 knots becoming east 15 to
25 knots. A chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.

$$

LSZ266-110800-
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 Sun May 10 2026

.REST OF TONIGHT...Northwest winds 10 to 20 knots veering north
late. Waves 2 to 4 feet subsiding to calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots veering east late. Waves
calm to 2 feet.
.MONDAY NIGHT...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 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 8 feet
occasionally to 10 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots becoming north
20 to 30 knots after midnight. Rain showers likely through
midnight, then a chance of rain showers after midnight. 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. A chance of rain
showers through early afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Southeast winds 10 to 20 knots becoming south 20 to
30 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...South winds 20 to 30 knots becoming east 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.

$$

LSZ267-110800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Sun May 10 2026

.REST OF TONIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then veering north late. Waves
2 to 4 feet subsiding to calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then becoming west 5 to 15 knots late.
Waves calm to 2 feet.
.MONDAY NIGHT...South winds less than 10 knots becoming southeast
5 to 15 knots after midnight, then increasing to 10 to 20 knots
late. Waves calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid 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 1 to
3 feet, then building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...North winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. A chance of rain showers. 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 diminishing to
5 to 15 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
3 to 5 feet occasionally to 7 feet.
.FRIDAY...South winds 15 to 25 knots becoming east 10 to
20 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 1 to 3 feet.

$$

LSZ261-110800-
MAFOR 1103/
Superior West 11700 11800 12100 12300 12310. Waves 2 feet or
less.

Superior North Central 12710 11800 12700 11500 11400 11410. Waves
1 foot or less.

Superior South Central 13710 12700 11200 12310. Waves 2 feet or
less.

Superior East 12720 11810 13700 11600 11400. Waves 2 to 4 feet
overnight. Waves 1 to 3 feet Monday. Waves 1 foot or less Monday
evening.

$$

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