092
FZUS63 KMQT 270801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EDT Thu Aug 27 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 30.1 inch high pressure over northern Manitoba stretches towards
Lake Superior today through tonight, eventually becoming centered
over Lake Superior at 30.2 inches by Friday morning before
continuing into New England on Saturday. Saturday night, a low
pressure over the Central to Northern Plains deepens to 29.6 inches.
This low approaches the Great Lakes over the course of early next
week, with heights over Lake Superior falling to 29.8 inches by
Monday afternoon.



LSZ162-272000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EDT Thu Aug 27 2026 /300 AM CDT Thu Aug 27 2026/

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 5 to 15 knots backing southwest in the
afternoon, then backing southeast late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing north late. Waves
calm to 2 feet.
.FRIDAY...Northeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots becoming northeast less
than 10 knots after midnight. A slight chance of showers after
midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...East winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. A chance of showers. Waves calm to
2 feet.
.SUNDAY...Northeast winds 15 to 25 knots. A chance of showers.
Waves building to 1 to 3 feet.
.MONDAY...Northeast winds 15 to 25 knots becoming north 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ263-272000-
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-
400 AM EDT Thu Aug 27 2026

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots veering northeast late. A
slight chance of showers by mid afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots diminishing to less than
10 knots after midnight, then backing north late. Waves calm to
2 feet.
.FRIDAY...Southeast winds less than 10 knots becoming southwest
5 to 15 knots in the afternoon, then backing south late. Waves
calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots. A chance of showers. Waves
building to 1 to 3 feet.
.MONDAY...East winds 10 to 20 knots veering west. A chance of
showers. Waves building to 2 to 4 feet, then subsiding to calm to
2 feet.

$$

LSZ264-272000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EDT Thu Aug 27 2026

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TODAY...North winds 5 to 15 knots backing northwest late. A
slight chance of showers by mid afternoon. Waves subsiding to
calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots diminishing to less than
10 knots after midnight. Waves calm to 2 feet.
.FRIDAY...West winds less than 10 knots becoming southwest 5 to
15 knots in the afternoon, then backing south late. Waves calm to
2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots backing east
after midnight. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots.
A chance of showers. Waves building to 1 to 3 feet.
.MONDAY...East winds 10 to 20 knots veering southwest. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ265-272000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EDT Thu Aug 27 2026

.EARLY THIS MORNING...North winds 15 to 25 knots. Waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet.
.TODAY...North winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southeast in the
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. A chance of showers. Waves calm to
2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots. A chance of showers. Waves
building to 1 to 3 feet.
.MONDAY...East winds 15 to 25 knots veering southwest. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.

$$

LSZ266-272000-
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-
400 AM EDT Thu Aug 27 2026

.EARLY THIS MORNING...North winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TODAY...North winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon, then backing northwest late. Waves subsiding to
1 to 3 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing east late. Waves calm
to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots. A chance of showers. Waves
building to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots veering southwest. A
chance of showers. Waves building to 2 to 4 feet, then subsiding
to 1 to 3 feet.

$$

LSZ267-272000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EDT Thu Aug 27 2026

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Patchy
dense fog. Waves 2 to 4 feet building to 3 to 5 feet occasionally
to 7 feet.
.TODAY...North winds 15 to 25 knots backing northwest late. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north after
midnight, then diminishing to 5 to 15 knots late. Waves subsiding
to calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. A chance of
showers. Waves calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet.
.MONDAY...Southeast winds 10 to 20 knots veering south. A chance
of showers. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

$$

LSZ261-271400-
MAFOR 2709/
Superior West 11710 12700 11400 12200 12100. Waves 1 foot or
less.

Superior North Central 12820 11810 14700 11700. Waves 2 to 4 feet
subsiding to 1 to 3 feet today. Waves 1 foot or less tonight.

Superior South Central 11740 11830 11820 14810 11810. Waves 3 to
5 feet subsiding to 1 to 3 feet today. Waves 2 feet or less
tonight.

Superior East 11730 19734 11830 11820 12720 12710 11800. Waves 3
to 5 feet subsiding to 2 to 4 feet today. Waves 2 to 4 feet
subsiding to 1 to 3 feet 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