735
FZUS63 KMQT 300203
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1002 PM EDT Tue Jul 29 2025

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...

30.1 inch ridging maintains over Lake Superior today while a broad
30.3 inch high settles over the Canadian Prairies. This high slowly
shifts toward the Great Lakes tonight through Wednesday night,
becoming centered over Lake Superior by Thursday night, then
maintains its strength at 30.3 to 30.4 inches over the Great Lakes
through Saturday before weakening to 30.2 inches and moving toward
the Eastern Seaboard on Sunday.


LSZ162-300800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 PM EDT Tue Jul 29 2025 /902 PM CDT Tue Jul 29 2025/

.REST OF TONIGHT...Northwest winds 5 to 15 knots veering north
after midnight, then becoming northeast 10 to 20 knots late.
Areas of smoke. Haze after midnight. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Haze and areas of smoke. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots. Haze and areas
of smoke. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots veering south by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south. 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-
1002 PM EDT Tue Jul 29 2025

.REST OF TONIGHT...West winds 5 to 15 knots veering north after
midnight, then veering northeast late. Areas of smoke. Haze after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Haze and areas of smoke. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots becoming northeast
less than 10 knots late. Haze and areas of smoke. Waves calm to
2 feet.
.THURSDAY...Northeast winds 5 to 15 knots veering south by mid
afternoon. Haze through early afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south. Waves calm
to 2 feet.

$$

LSZ264-300800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1002 PM EDT Tue Jul 29 2025

.REST OF TONIGHT...West winds 5 to 15 knots veering north after
midnight. Areas of smoke. Haze after midnight. Waves calm to
2 feet.
.WEDNESDAY...North winds 5 to 15 knots backing northwest late.
Areas of smoke. Haze by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight, then becoming northeast less than 10 knots late.
Haze. Waves calm to 2 feet.
.THURSDAY...Northeast winds less than 10 knots veering south by
mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south. Waves calm
to 2 feet.

$$

LSZ265-300800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1002 PM EDT Tue Jul 29 2025

.REST OF TONIGHT...Northwest winds 5 to 15 knots becoming north
10 to 20 knots late. Areas of smoke. Waves calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots veering northeast in the
afternoon. Areas of smoke. Haze by mid afternoon. Waves calm to
2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots. Haze. Waves calm to
2 feet.
.THURSDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots becoming south 5 to 15 knots.
Waves calm to 2 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-
1002 PM EDT Tue Jul 29 2025

.REST OF TONIGHT...Northwest winds 5 to 15 knots veering north
late. Areas of smoke. Waves calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots late. Areas of smoke through early afternoon. Haze.
Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then becoming northeast 5 to 15 knots
late. Haze. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots backing north by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots veering west by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.

$$

LSZ267-300800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1002 PM EDT Tue Jul 29 2025

.REST OF TONIGHT...Northwest winds 10 to 20 knots veering north
late. Areas of smoke. Waves calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing northwest late. Areas of
smoke through early afternoon, then haze by mid afternoon. Waves
calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots veering northeast
after midnight, then diminishing to 5 to 15 knots late. Waves
calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots backing northwest by
mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south. Waves calm
to 2 feet.

$$

LSZ261-300800-
MAFOR 3003/
Superior West 11800 11810 12110 13200 11110. Waves 1 foot or
less.

Superior North Central 11700 13810 12800 12700. Waves 1 foot or
less.

Superior South Central 12700 11810 12800 11110 11100 11800. Waves
1 foot or less.

Superior East 12710 13810 12710 11810. Waves 1 to 2 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