205
FZUS63 KMQT 300201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Tue Sep 29 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 29.2 inch low over northern Manitoba moves to Hudson Bay,
deepening to 29.1 inches for Wednesday morning. Pressure falls to
29.7 inches over Lake Superior tonight and could deepen to 29.6
inches on Wednesday as the deep Canadian low strengthens to 29.0
inches Wednesday afternoon. 29.8 inch troughing lingers over the
lake on Thursday between this low and another 29.7 low over the
Southern Plains. High pressure then builds to 30.3 inches over the
Northern Plains Thursday night into Friday before shifting east into
the Great Lakes Friday night and Saturday. In it`s wake, a weak 30.0
inch Clipper moves over Lake Superior Saturday night and Sunday,
with 30.3 inch ridging returning Sunday night and Monday.



LSZ162-300800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Tue Sep 29 2026 /901 PM CDT Tue Sep 29 2026/

.REST OF TONIGHT...South winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight. A chance of showers by midnight.
Waves 2 to 4 feet subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.FRIDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots becoming southwest less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SUNDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ263-300800-
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-
1001 PM EDT Tue Sep 29 2026

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

$$

LSZ264-300800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Tue Sep 29 2026

.REST OF TONIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of showers. Waves 2 to 4 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. Waves subsiding to
1 to 3 feet, then building to 2 to 4 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots veering west
late. Waves subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 15 to 25 knots backing west by mid
afternoon. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots backing west by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 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...Southwest winds 5 to 15 knots becoming west 15 to
25 knots. Showers likely. Waves building to 2 to 4 feet.
.SUNDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet.

$$

LSZ265-300800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Tue Sep 29 2026

.REST OF TONIGHT...South winds 15 to 25 knots diminishing to
10 to 20 knots late. A chance of showers. Waves 2 to 4 feet
subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming south 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight, then becoming west 15 to 25 knots
late. Waves building to 1 to 3 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing west by mid
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. Waves building to 2 to 4 feet.
.FRIDAY...Northwest winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...West winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots becoming west 15 to
25 knots. A chance of showers. Waves building to 1 to 3 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 2 to 4 feet.

$$

LSZ266-300800-
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-
1001 PM EDT Tue Sep 29 2026

.REST OF TONIGHT...South winds 20 to 30 knots diminishing to
15 to 25 knots late. A chance of showers. Waves 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming south 5 to
15 knots late. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight, then becoming west 15 to 25 knots late. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.THURSDAY...Northwest winds 15 to 25 knots. Waves building to
2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots. Waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet.
.FRIDAY...Northwest gales to 35 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots backing west after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots becoming west 15 to
25 knots. A chance of showers. Waves building to 2 to 4 feet.
.SUNDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.

$$

LSZ267-300800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Tue Sep 29 2026

.REST OF TONIGHT...South winds 15 to 25 knots. A chance of
showers. Waves 2 to 4 feet.
.WEDNESDAY...South winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon, then becoming south 5 to 15 knots
late. A slight chance of showers through early afternoon. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 15 to 25 knots veering northwest by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves 2 to 4 feet.
.FRIDAY...Northwest winds 20 to 30 knots. Waves building to 5 to
9 feet occasionally to 11 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 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet.
.SUNDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots. A chance of showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ261-300800-
MAFOR 3003/
Superior West 12520 12510 12520 12510. A chance of showers
overnight. Waves 1 to 3 feet.

Superior North Central 11426 13520 12530 11520 11510. Waves 2 to
4 feet overnight and Wednesday. Waves 1 to 3 feet Wednesday
evening.

Superior South Central 11436 11430 11420 11520 11510 11410 11300
11410. Waves 2 to 4 feet overnight. Waves 2 to 4 feet subsiding
to 1 foot or less Wednesday. Waves 1 foot or less Wednesday
evening.

Superior East 11430 11436 11430 11420 11520 11510 11400 11410.
Waves 3 to 5 feet overnight. Waves 3 to 5 feet subsiding to 1 to
3 feet Wednesday. Waves 1 to 2 feet Wednesday evening.

$$

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