559
FZUS63 KMQT 010201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EDT Sat Oct 31 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 30.5 inch high pressure over the eastern Great Lakes will continue
to slowly move southeast, reaching the Eastern Seaboard Sunday
night. This continues to extend a 30.2 inch ridge over Lake Superior
through Sunday. Thereafter a 29.4 inch low will move from Colorado
to the Plains on Monday, then lift into Minnesota Monday evening,
eventually passing over western Lake Superior at 29.7 inches on
Tuesday. This low then passes north towards James Bay Tuesday night.
In its wake, high pressure ridging of 30.0 inches builds back over
Lake Superior by late Wednesday through Friday.



LSZ162-010800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Sat Oct 31 2026 /900 PM CDT Sat Oct 31 2026/

.REST OF TONIGHT...East winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then backing north late. Scattered
showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing south late. Waves calm to
2 feet.
.SUNDAY NIGHT...East winds less than 10 knots increasing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers through early afternoon,
then showers by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 15 to 25 knots. Showers. Waves
building to 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 25 knots veering west by mid
afternoon. Showers. Waves building to 2 to 4 feet, then subsiding
to 1 to 3 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots. A chance of showers.
Waves building to 2 to 4 feet.
.WEDNESDAY...West winds 15 to 25 knots becoming north 10 to
20 knots. A chance of showers. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 10 to 20 knots. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ263-010800-
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-
1000 PM EDT Sat Oct 31 2026

.REST OF TONIGHT...South winds less than 10 knots increasing to
5 to 15 knots after midnight. Isolated showers. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. A slight chance of
showers through early afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots. Showers likely by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Showers. Waves building to 2 to 4 feet.
.TUESDAY...Southeast winds 10 to 20 knots veering southwest by
mid afternoon. Showers. Waves 2 to 4 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Showers likely. Waves building to
3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...West winds 10 to 20 knots veering north. A chance of
rain showers. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.THURSDAY...North winds 10 to 20 knots veering northeast. Waves
subsiding to 1 to 3 feet.

$$

LSZ264-010800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EDT Sat Oct 31 2026

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest
late. Isolated showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. A slight chance of
showers through early afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds less than 10 knots becoming south
5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. A chance of showers by mid afternoon.
Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.TUESDAY...Southeast winds 15 to 25 knots veering south by mid
afternoon. Showers. Waves building to 3 to 6 feet occasionally to
8 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Showers likely. Waves subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...West winds 10 to 20 knots veering north. A chance of
showers. Waves subsiding to 1 to 3 feet.
.THURSDAY...North winds 15 to 25 knots becoming northeast 5 to
15 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ265-010800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EDT Sat Oct 31 2026

.REST OF TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Scattered showers. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest in the
afternoon, then backing south late. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. A chance of showers by mid afternoon.
Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southeast winds 20 to 30 knots. Showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Southeast winds 20 to 30 knots veering south by mid
afternoon. Showers. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.
.TUESDAY NIGHT...Southwest winds 20 to 30 knots. Showers likely
through midnight, then a chance of showers after midnight. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.WEDNESDAY...West winds 20 to 30 knots veering north. A chance of
showers. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.THURSDAY...North winds 20 to 30 knots becoming northeast 15 to
25 knots. Waves 2 to 4 feet.

$$

LSZ266-010800-
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-
1000 PM EDT Sat Oct 31 2026

.REST OF TONIGHT...South winds 10 to 20 knots. Isolated showers.
Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon. A slight chance of showers through
early afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots late. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming southeast 15 to
25 knots by mid afternoon. A chance of showers by mid afternoon.
Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. Showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.TUESDAY...South gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. Showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots veering southwest
after midnight. Showers likely through midnight, then a chance of
showers after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...West winds 15 to 25 knots veering north. A chance of
showers. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet.
.THURSDAY...North winds 15 to 25 knots veering northeast. Waves
2 to 4 feet.

$$

LSZ267-010800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EDT Sat Oct 31 2026

.REST OF TONIGHT...South winds 10 to 20 knots. Isolated showers
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon. A slight chance of showers through
early afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers by mid afternoon. Waves calm to
2 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots. Showers. Waves
building to 2 to 4 feet.
.TUESDAY...South winds 20 to 30 knots. Showers. Waves building to
3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots. Showers through
midnight, then a chance of showers after midnight. Waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...Southwest winds 20 to 30 knots becoming north 15 to
25 knots. A chance of showers. Waves subsiding to 2 to 4 feet.
.THURSDAY...North winds 15 to 25 knots veering northeast. Waves
2 to 4 feet.

$$

LSZ261-010800-
MAFOR 0103/
Superior West 11300 19306 11400 19406 11500 19506 13500 11400
11300. Waves 1 foot or less.

Superior North Central 12400 15500. Waves 1 foot or less.

Superior South Central 11420 11410 19416 12410 13400 11410. Waves
2 feet or less.

Superior East 14410 11510 13500. Waves 2 feet or less.

$$

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