289
FZUS63 KMQT 270201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Sat Sep 26 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 shifts east over northern Quebec tonight
while a 29.3 inch low spins just north of Saskatchewan and a 29.3
inch nor`easter churns off the coast of Long Island. On Sunday, Lake
Superior will be between the 30.3 inch high moving to the Canadian
Maritimes, the Canadian low over Nunavut at 29.2 inches, the
nor`easter over New Jersey at 29.6 inches, and a high pressure
moving from the Rockies to the Dakotas at 30.1 inches. The latter
high moves directly over the lake Monday as a 29.7 inch low develops
over Colorado. This low ejects northeast late Monday through
Tuesday, reaching far northern Ontario at 29.7 inches late Tuesday.
Tuesday night through Wednesday night, a 29.3 inch low moves across
the far northern Canadian Prairie to Hudson Bay, dragging a 29.7
inch trough across Lake Superior Wednesday night. High pressure of
30.2 inches returns to the Great Lakes By Friday.



LSZ162-270800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Sat Sep 26 2026 /901 PM CDT Sat Sep 26 2026/

.REST OF TONIGHT...East winds 5 to 15 knots veering south after
midnight. A chance of showers. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots veering southwest in the
afternoon. A slight chance of showers through early afternoon.
Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering north late.
Waves calm to 2 feet.
.MONDAY...East winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots veering southwest by mid
afternoon. Showers likely. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots. A chance of
showers. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots veering northwest. Waves
calm to 2 feet.

$$

LSZ263-270800-
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 Sat Sep 26 2026

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

$$

LSZ264-270800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Sat Sep 26 2026

.REST OF TONIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots diminishing to less than
10 knots after midnight, then becoming north 5 to 15 knots late.
Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots becoming east less than
10 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers. Waves building to 1 to
3 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Showers likely through midnight,
then a chance of showers after midnight. Waves subsiding to calm
to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...West winds 20 to 30 knots becoming northwest 15 to
25 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ265-270800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Sat Sep 26 2026

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

$$

LSZ266-270800-
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 Sat Sep 26 2026

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

$$

LSZ267-270800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Sat Sep 26 2026

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

$$

LSZ261-270800-
MAFOR 2703/
Superior West 13410 11400 13500 11600. Waves 2 feet or less.

Superior North Central 12410 11400 14500 11600. Waves 2 feet or
less.

Superior South Central 11410 14400 11300 11200 11600. Waves 2
feet or less.

Superior East 11300 14400 11500 12800. Waves 1 foot 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