909
FZUS63 KMQT 270200
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EDT Mon Oct 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 30.5 inch high pressure centered over northern Ontario tonight
continues eastward, reaching the Saint Lawrence Seaway on Tuesday.
This keeps ridging of at least 30.4 inches over Lake Superior
through Tuesday afternoon. A 29.8 inch Colorado low lifts through
the Plains on Wednesday, eventually moving through Lake Superior
Wednesday night into early Thursday morning. High pressure of 30.2
to 30.3 inches returns to the Upper Great Lakes by Friday. The
high`s center builds to 30.4 inches over the Lower Great Lakes by
early Saturday, with ridging of at least 30.2 inches remaining over
Lake Superior until Saturday night.



LSZ162-270800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Mon Oct 26 2026 /900 PM CDT Mon Oct 26 2026/

.REST OF TONIGHT...East winds 10 to 20 knots. A chance of rain
showers after midnight. Waves calm to 2 feet building to 1 to
3 feet.
.TUESDAY...East winds 15 to 25 knots. Rain showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight, then veering southwest late. A
chance of showers through midnight. Waves subsiding to calm to
2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. A chance of showers
by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots becoming west 10 to
20 knots after midnight. Showers and a slight chance of
thunderstorms through midnight, then a slight chance of showers
after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots veering northeast. Waves calm
to 2 feet.
.SATURDAY...East winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. 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-
1000 PM EDT Mon Oct 26 2026

.REST OF TONIGHT...East winds 5 to 15 knots. A slight chance of
rain showers after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots late. A chance of rain showers through early afternoon,
then rain showers likely by mid afternoon. Waves building to 2 to
4 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight, then becoming southwest 5 to 15 knots late. A
slight chance of showers through midnight. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A slight chance of
showers by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. Showers and a slight chance of thunderstorms through
midnight, then a chance of showers after midnight. Waves building
to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots. Waves building to 2 to
4 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing east. Waves calm to
2 feet.
.SATURDAY...East winds 5 to 15 knots veering south. A chance of
rain showers. Waves calm to 2 feet.

$$

LSZ264-270800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EDT Mon Oct 26 2026

.REST OF TONIGHT...Northeast winds less than 10 knots becoming
east 5 to 15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots increasing to 15 to
25 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight, then diminishing to 10 to 20 knots late. A chance
of showers through midnight. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. Showers. Waves building to 1 to 3 feet.
.THURSDAY...West winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing east. Waves calm to
2 feet.
.SATURDAY...Southeast winds 5 to 15 knots veering south. A chance
of showers. Waves calm to 2 feet.

$$

LSZ265-270800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EDT Mon Oct 26 2026

.REST OF TONIGHT...Northeast winds 10 to 20 knots veering east
after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots diminishing to 10 to
20 knots. A slight chance of showers through midnight. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet.
.WEDNESDAY...South winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.WEDNESDAY NIGHT...South winds 15 to 25 knots becoming west 20 to
30 knots after midnight. Showers. Waves building to 1 to 3 feet.
.THURSDAY...West winds 20 to 30 knots. Waves 1 to 3 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots becoming southeast 5 to
15 knots. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south. A
chance of showers. Waves calm to 2 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-
1000 PM EDT Mon Oct 26 2026

.REST OF TONIGHT...Northeast winds 5 to 15 knots veering east
after midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...Southeast winds to 30 knots with a few gale
force gusts to 35 knots possible becoming south 20 to 30 knots
after midnight, then diminishing to 15 to 25 knots late. A chance
of showers through midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. A chance of showers through midnight, then
showers after midnight. Waves building to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. Waves subsiding to 1 to
3 feet, then 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.
.FRIDAY...West winds 5 to 15 knots veering northwest. Waves
subsiding to calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering south. A
chance of showers. Waves calm to 2 feet.

$$

LSZ267-270800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EDT Mon Oct 26 2026

.REST OF TONIGHT...Northeast winds 10 to 20 knots veering
southeast late. Waves calm to 2 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots. A slight chance of rain showers by mid afternoon. Waves
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...Southeast winds 20 to 30 knots veering south
after midnight. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. A slight chance of showers through
midnight, then showers after midnight. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.THURSDAY...West winds 15 to 25 knots. Waves 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves 2 to 4 feet.
.FRIDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ261-270800-
MAFOR 2703/
Superior West 11210 13220 12236 11220 11320. Waves 1 to 3 feet
overnight. Waves 2 to 4 feet building to 3 to 5 feet Tuesday.
Waves 2 to 4 feet Tuesday evening.

Superior North Central 11100 12200 11310 11320 11330 11336 11340.
Waves 1 foot or less overnight. Waves 1 to 3 feet building to 3
to 5 feet Tuesday. Waves 3 to 6 feet Tuesday evening.

Superior South Central 11100 11200 11310 12320 11330 12340. A
chance of showers Tuesday afternoon and Tuesday evening. Waves 1
to 2 feet overnight. Waves 1 to 3 feet building to 3 to 5 feet
Tuesday. Waves 3 to 5 feet Tuesday evening.

Superior East 11100 11200 12310 12320 11330 11340. A chance of
showers Tuesday evening. Waves 1 to 2 feet overnight. Waves 1 to
3 feet building to 3 to 5 feet Tuesday. Waves 4 to 6 feet Tuesday
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