856
FZUS63 KMQT 110201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Mon Aug 10 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...

Weak 29.9 inch ridge persists over Lake Superior through Tuesday.
Weak troughing of around 29.8 inches moves over the lake Tuesday
night into Wednesday before high pressure gradually builds over the
Great Lakes from western Canada late in the week, strengthening to
30.2 inches by Friday.



LSZ162-110800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Mon Aug 10 2026 /901 PM CDT Mon Aug 10 2026/

.REST OF TONIGHT...West winds 5 to 15 knots veering north after
midnight, then diminishing to less than 10 knots late. Waves calm
to 2 feet.
.TUESDAY...North winds less than 10 knots veering east in the
afternoon, then becoming southeast 5 to 15 knots late. Waves calm
to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots backing north
after midnight. Waves calm to 2 feet.
.WEDNESDAY...North winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. A slight chance of showers through
early afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots backing north
after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...East winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots backing north. A chance of
showers. Waves calm to 2 feet.

$$

LSZ263-110800-
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 Mon Aug 10 2026

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering west
after midnight, then diminishing to less than 10 knots late.
Waves calm to 2 feet.
.TUESDAY...West winds less than 10 knots becoming northeast 5 to
15 knots in the afternoon, then veering south late. Waves calm to
2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight, then veering northwest late. Waves
calm to 2 feet.
.WEDNESDAY...North winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds less than 10 knots becoming
northwest 5 to 15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds less than 10 knots. Waves calm to
2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots backing north. A chance of
showers. Waves calm to 2 feet.

$$

LSZ264-110800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Mon Aug 10 2026

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering west
after midnight, then diminishing to less than 10 knots late.
Waves calm to 2 feet.
.TUESDAY...West winds less than 10 knots backing south in the
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds less than 10 knots veering southwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...North winds less than 10 knots veering south by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds less than 10 knots veering
northwest after midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds less than 10 knots veering
north after midnight. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots veering southeast. Waves calm
to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots veering northwest. A
chance of showers. Waves calm to 2 feet.

$$

LSZ265-110800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Mon Aug 10 2026

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest
after midnight, then increasing to 10 to 20 knots late. Waves
calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing east in the
afternoon. A slight chance of showers. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
late. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots veering northeast by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots backing west
after midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots veering north by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots veering southeast. Waves calm
to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots veering northwest. A
chance of showers. Waves calm to 2 feet.

$$

LSZ266-110800-
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 Mon Aug 10 2026

.REST OF TONIGHT...Southwest winds 5 to 15 knots backing south
after midnight. Patchy dense fog. Waves calm to 2 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing southeast in the
afternoon, then backing east late. A slight chance of showers.
Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots veering north by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots veering southeast. Waves calm
to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ267-110800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Mon Aug 10 2026

.REST OF TONIGHT...West winds 5 to 15 knots backing south after
midnight. Patchy fog. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots backing northeast late.
Patchy fog through early afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight, then backing west late. Waves calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots backing southeast. Waves
calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ261-110800-
MAFOR 1103/
Superior West 11600 11800 13100 11200 12300. Waves 1 foot or
less.

Superior North Central 11510 11600 12500 11600 13400. Waves 1
foot or less.

Superior South Central 11400 13500 11300 12200 11300. Waves 1
foot or less.

Superior East 11500 19504 11400 19404 12400 11300 11400 12600.
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