380
FZUS63 KMQT 090201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Fri May 8 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...

Troughing is deepening to 29.5 inches over the lake his evening,
extending from 29.4 inch low pressure over Hudson Bay. The trough
pushes east into Quebec by Saturday afternoon as 30.3 inch high
pressure builds over the Canadian Prairie this weekend. The high
shifts east to the Great Lakes at 30.3 inches by Sunday night.
Ridging persists at around 30.2 inches over Lake Superior through
Monday, followed by a 29.7 inch trough on Tuesday as high pressure
weakens and shifts to the East Coast.


LSZ162-090800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Fri May 8 2026 /901 PM CDT Fri May 8 2026/

.REST OF TONIGHT...North winds 5 to 15 knots backing west after
midnight, then veering northwest late. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots backing west in the
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...North winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers after midnight. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots becoming north 5 to
15 knots. A chance of rain showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.

$$

LSZ263-090800-
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 Fri May 8 2026

.REST OF TONIGHT...West winds 5 to 15 knots veering northwest
late. A chance of rain showers by midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.MONDAY...North winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.TUESDAY...Southeast winds 5 to 15 knots backing north. A chance
of rain showers. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.

$$

LSZ264-090800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Fri May 8 2026

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest
after midnight, then veering northwest late. Sprinkles by
midnight. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots backing west late. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds less than 10 knots becoming southwest
5 to 15 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots backing southeast after
midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots becoming north 5 to
15 knots. A chance of rain showers. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-090800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Fri May 8 2026

.REST OF TONIGHT...South winds 10 to 20 knots veering west late.
A chance of rain showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 15 to 25 knots. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots veering northwest
late. Waves subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.SUNDAY NIGHT...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 by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing southwest.
Waves calm to 2 feet.

$$

LSZ266-090800-
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 Fri May 8 2026

.REST OF TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering west late. A chance of rain
showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots backing west
after midnight, then veering northwest late. Waves subsiding to
1 to 3 feet.
.SUNDAY...Northwest winds 15 to 25 knots. Waves building to 2 to
4 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...Northwest winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots becoming north 10 to
20 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west. Waves
calm to 2 feet.

$$

LSZ267-090800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Fri May 8 2026

.REST OF TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots late. A chance of rain showers. Flurries after midnight.
Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots increasing to 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight, then becoming west 10 to 20 knots
late. Waves subsiding to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of rain and snow showers
through early afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...Northwest winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.MONDAY NIGHT...West winds less than 10 knots becoming south 5 to
15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots. A chance of rain
showers. Waves calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ261-090800-
MAFOR 0903/
Superior West 11700 11600 13710 13610. Waves 2 feet or less.

Superior North Central 11400 11600 11700 13710 12610. Waves 2
feet or less.

Superior South Central 11420 11510 11610 12720 11730 12720. A
chance of rain showers overnight. Waves 1 to 3 feet.

Superior East 12410 11600 11700 11710 13730. A chance of rain
showers overnight. Waves 1 to 2 feet overnight. Waves 1 to 2 feet
building to 2 to 4 feet Saturday. Waves 3 to 5 feet Saturday
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