390
FZUS63 KMQT 020815 AAA
GLFLS

Open Lake Forecast for Lake Superior...UPDATED
National Weather Service Marquette MI
415 AM EDT Sat May 2 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...

Weak ridging persists between 30.0 and 30.1 inches over Lake
Superior through this morning. A 29.6 inch trough moves over the
lake tonight and deepens with time before a 29.1 inch low crosses
northern Ontario and drags a 29.3 inch trough across the lake on
Monday. Weak ridging around 30.0 inches builds back over Lake
Superior by Tuesday in the wake of the low and persists through
Wednesday as high pressure builds over the Northern Plains.


LSZ162-021615-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
415 AM EDT Sat May 2 2026 /315 AM CDT Sat May 2 2026/

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Southwest winds 5 to 15 knots backing south in the
afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing northeast after
midnight, then backing west late. A chance of rain showers. Waves
calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A chance of rain showers after
midnight. Waves building to 1 to 3 feet.
.MONDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots backing west after
midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering northwest.
Waves calm to 2 feet.

$$

LSZ263-021615-
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-
415 AM EDT Sat May 2 2026

.EARLY THIS MORNING...Southwest winds less than 10 knots. Waves
calm to 2 feet.
.TODAY...Southwest winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing south late. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering southwest late.
A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A slight chance of rain showers through early
afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A slight chance of rain showers
after midnight. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.MONDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots
by mid afternoon. A chance of rain showers. Waves building to
3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering west. Waves
calm to 2 feet.

$$

LSZ264-021615-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
415 AM EDT Sat May 2 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...West winds less than 10 knots becoming southwest 5 to
15 knots in the afternoon, then backing south late. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots. A chance of rain showers.
Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. A slight chance of rain showers through early
afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots becoming south
15 to 25 knots after midnight. A slight chance of rain showers
after midnight. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. A chance of rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots becoming northwest 5 to
15 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-021615-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
415 AM EDT Sat May 2 2026

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TODAY...West winds 5 to 15 knots backing southwest in the
afternoon, then backing southeast late. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots veering south after
midnight. A chance of rain showers. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A slight chance of rain showers. Waves building
to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots becoming south
15 to 25 knots after midnight. A slight chance of rain showers
after midnight. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.MONDAY...Southwest winds 20 to 30 knots veering west by mid
afternoon. A chance of rain showers. Waves building to 2 to
4 feet.
.MONDAY NIGHT...West winds 20 to 30 knots. Waves 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west. Waves
calm to 2 feet.

$$

LSZ266-021615-
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-
415 AM EDT Sat May 2 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 5 to 15 knots backing west in the
afternoon, then backing south late. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. A chance of rain showers after midnight. Waves
building to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. A chance of rain showers. Waves 1 to
3 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots becoming south 15 to
25 knots after midnight. A slight chance of rain showers after
midnight. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.MONDAY...Southwest winds 20 to 30 knots veering west by mid
afternoon. A chance of rain showers through early afternoon, then
rain showers likely by mid afternoon. Waves building to 3 to
5 feet occasionally to 7 feet.
.MONDAY NIGHT...West winds 20 to 30 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.TUESDAY...West winds 15 to 25 knots. Waves subsiding to 1 to
3 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west. Waves
subsiding to calm to 2 feet.

$$

LSZ267-021615-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 AM EDT Sat May 2 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 5 to 15 knots becoming west 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots backing south after
midnight, then increasing to 10 to 20 knots late. A slight chance
of rain showers after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots veering west late. A chance
of rain showers. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots backing south after
midnight. A slight chance of rain showers after midnight. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...South winds 15 to 25 knots veering southwest by mid
afternoon. A chance of rain showers through early afternoon, then
rain showers likely by mid afternoon. Waves building to 3 to
5 feet occasionally to 7 feet.
.MONDAY NIGHT...West winds 15 to 25 knots. A chance of rain
showers through midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ261-021615-
MAFOR 0209/
Superior West 13500 11400 12300 11310 11510. A chance of rain
showers tonight. Waves 1 foot or less.

Superior North Central 12700 11600 11500 14410. A chance of rain
showers overnight. Waves 2 feet or less.

Superior South Central 11710 12600 12300 11310 12420. A chance of
rain showers overnight. Waves 2 feet or less.

Superior East 13700 11600 12500 12410. Waves 1 to 2 feet.

$$

CB

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes