036
FZUS63 KMQT 011402
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1002 AM EDT Thu Oct 1 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 of around 29.8 inches lingers over eastern Lake Superior
this morning between a 29.1 inch Hudson Bay low and another 29.7
inch low over the South Plains. High pressure builds to 30.2 inches
over the northern Plains tonight into Friday before shifting east to
the Great Lakes Friday night and Saturday and building to 30.3
inches. A weak 29.9 inch trough crosses Lake Superior Saturday night
and Sunday, with 30.3 inch high pressure quickly returning Sunday
night into Monday. Ridging remains in the area through Tuesday
afternoon before being replaced by troughing Wednesday morning.



LSZ162-012000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 AM EDT Thu Oct 1 2026 /902 AM CDT Thu Oct 1 2026/

.REST OF TODAY...West winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. Waves calm to 2 feet building to 1 to
3 feet.
.TONIGHT...Northwest winds 15 to 25 knots. Waves subsiding to
calm to 2 feet, then building to 1 to 3 feet.
.FRIDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.SATURDAY NIGHT...Southwest winds 15 to 25 knots veering west
after midnight. Waves building to 1 to 3 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots becoming south 10 to
20 knots. Waves building to 1 to 3 feet.

$$

LSZ263-012000-
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-
1002 AM EDT Thu Oct 1 2026

.REST OF TODAY...Northwest winds 5 to 15 knots becoming west
10 to 20 knots in the afternoon, then increasing to 15 to
25 knots late. Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots late. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots. A slight chance of
showers by mid afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots becoming west 20 to
30 knots after midnight. A chance of showers. Waves building to
3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to 1 to 3 feet.
.MONDAY...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.

$$

LSZ264-012000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1002 AM EDT Thu Oct 1 2026

.REST OF TODAY...Northwest winds 10 to 20 knots becoming west
15 to 25 knots in the afternoon. Waves 1 to 3 feet building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.TONIGHT...Northwest winds 15 to 25 knots. Waves subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 1 to 3 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A slight chance of showers by mid
afternoon. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots veering west after
midnight. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...Northwest gales to 40 knots diminishing to 15 to
25 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 2 to 4 feet.
.MONDAY...Northwest winds 10 to 20 knots backing south. Waves
subsiding to calm to 2 feet.

$$

LSZ265-012000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1002 AM EDT Thu Oct 1 2026

.REST OF TODAY...Northwest winds 20 to 30 knots becoming west to
30 knots with a few gale force gusts to 35 knots possible late.
Waves 2 to 4 feet building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.TONIGHT...Northwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible late. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds to 30 knots with a few gale force gusts
to 35 knots possible diminishing to 20 to 30 knots late. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots backing southwest after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A slight chance of showers by mid
afternoon. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 20 to 30 knots becoming southwest
gales to 35 knots after midnight. A chance of showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots. Waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming south 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-012000-
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-
1002 AM EDT Thu Oct 1 2026

.REST OF TODAY...Northwest winds 15 to 25 knots increasing to
20 to 30 knots in the afternoon. Areas of dense fog by late
morning. Waves 2 to 4 feet building to 3 to 5 feet occasionally
to 7 feet, then subsiding to 2 to 4 feet.
.TONIGHT...Northwest winds 20 to 30 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds 20 to 30 knots. Waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 20 to
30 knots by mid afternoon. A slight chance of showers by mid
afternoon. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 20 to 30 knots veering southwest
after midnight. A chance of showers through midnight, then
showers likely after midnight. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY...Northwest gales to 45 knots. Waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Northwest winds 15 to 25 knots becoming south 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-012000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1002 AM EDT Thu Oct 1 2026

.REST OF TODAY...West winds 15 to 25 knots veering northwest in
the afternoon, then increasing to 20 to 30 knots late. Areas of
dense fog by late morning. Waves 1 to 3 feet building to 3 to
6 feet occasionally to 8 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...Northwest winds 15 to 25 knots. Waves 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Northwest winds 20 to 30 knots. A slight chance of
showers through early afternoon. Waves building to 6 to 10 feet
occasionally to 13 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots becoming southwest
gales to 35 knots after midnight. A chance of showers through
midnight, then showers likely after midnight. Waves building to
4 to 7 feet occasionally to 9 feet.
.SUNDAY...West gales to 40 knots becoming northwest 20 to
30 knots. A chance of showers. Waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ261-012000-
MAFOR 0115/
Superior West 13620 13720 11730 11720. Waves 1 to 3 feet this
afternoon and tonight. Waves 2 to 4 feet Friday morning.

Superior North Central 11730 11630 11640 13730 12740. Waves 2 to
4 feet this afternoon and tonight. Waves 3 to 6 feet Friday
morning.

Superior South Central 12740 11640 11740 11730 13740. Waves 2 to
4 feet building to 3 to 5 feet this afternoon. Waves 3 to 5 feet
tonight. Waves 4 to 7 feet Friday morning.

Superior East 11724 13730 12720 12730. Waves 2 to 4 feet building
to 3 to 5 feet this afternoon. Waves 3 to 5 feet subsiding to 2
to 4 feet tonight. Waves 3 to 6 feet Friday morning.

$$

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