698
FZUS63 KMQT 310201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EDT Fri Oct 30 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 30.3 inch high pressure over the Upper Great Lakes will slowly
shift east through Saturday and build to 30.4 inches. This will keep
ridging of 30.2 inches over the lake through Sunday. The ridge will
weaken to 30.0 inches as the high moves to the Eastern Seaboard on
Monday. A 29.6 inch Colorado low develops on Monday and moves into
Minnesota by Tuesday morning. This low passes north of Lake Superior
into northern Ontario Tuesday night at 29.5 inches, dragging
troughing of at least 29.6 inches over the western half of the lake
Tuesday into Wednesday.



LSZ162-310800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Fri Oct 30 2026 /900 PM CDT Fri Oct 30 2026/

.REST OF TONIGHT...South winds less than 10 knots. Waves calm to
2 feet.
.SATURDAY...Southeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots becoming northeast
less than 10 knots after midnight, then veering south late. A
chance of showers. Waves calm to 2 feet.
.SUNDAY...Southwest winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds less than 10 knots backing east 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 likely by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Showers. Waves building to 2 to 4 feet.
.TUESDAY...East winds 15 to 25 knots becoming west 10 to
20 knots. Showers, then a chance of showers. Waves subsiding to
calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ263-310800-
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 Fri Oct 30 2026

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

$$

LSZ264-310800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EDT Fri Oct 30 2026

.REST OF TONIGHT...West winds 5 to 15 knots becoming southwest
less than 10 knots late. Waves calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots backing southeast
late. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
late. A slight chance of showers after midnight. Waves calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds less than 10 knots backing south
after midnight. Waves calm to 2 feet.
.MONDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A chance of showers through
midnight, then showers likely after midnight. Waves building to
2 to 4 feet.
.TUESDAY...Southeast gales to 35 knots diminishing to 15 to
25 knots. Showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 15 to 25 knots veering northwest. A
chance of showers. Waves subsiding to 1 to 3 feet, then building
to 2 to 4 feet.

$$

LSZ265-310800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EDT Fri Oct 30 2026

.REST OF TONIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing southeast late.
Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. A slight chance of
showers. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots. 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 increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. A chance of showers through
midnight, then showers likely after midnight. Waves building to
2 to 4 feet.
.TUESDAY...Southeast winds 20 to 30 knots veering south. Showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots. A chance of showers. Waves subsiding to calm to 2 feet,
then building to 2 to 4 feet.

$$

LSZ266-310800-
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 Fri Oct 30 2026

.REST OF TONIGHT...West winds 5 to 15 knots backing southwest
late. Waves 1 to 3 feet subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing south late.
Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. A slight chance of
showers after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. 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. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots. A chance of
showers through midnight, then showers likely after midnight.
Waves building to 2 to 4 feet.
.TUESDAY...South winds 20 to 30 knots. Showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.WEDNESDAY...West winds 15 to 25 knots veering northwest. A
chance of showers. Waves subsiding to 1 to 3 feet, then building
to 2 to 4 feet.

$$

LSZ267-310800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EDT Fri Oct 30 2026

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

$$

LSZ261-310800-
MAFOR 3103/
Superior West 13400 12300 13200. Waves 1 foot or less.

Superior North Central 11600 14500 11400 12300. Waves 1 foot or
less.

Superior South Central 11600 13500 11400 11300 11310 11420. Waves
2 feet or less.

Superior East 11600 14500 11500 11400 11410. Waves 1 to 3 feet.

$$

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