556
FZUS63 KMQT 100801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EDT Fri Jul 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 high pressure of 30.0 inches extends over Lake Superior from
Hudson Bay and northern Ontario today. High pressure builds to 30.1
to 30.2 inches over the lake this weekend as the high shifts south
to the Lower Great Lakes through Sunday. A strong low of around 29.3
inches looks to cross into Hudson Bay early next week. By Wednesday,
30.1 inch high pressure extends from the Canadian Prairie to the
southern Appalachians as 29.1 inch low pressure moves into northern
Quebec.



LSZ162-102000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EDT Fri Jul 10 2026 /300 AM CDT Fri Jul 10 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT /10 AM CDT/ THIS
MORNING...

.EARLY THIS MORNING...North winds less than 10 knots. Patchy
dense fog. Waves calm to 2 feet.
.TODAY...North winds less than 10 knots veering northeast in the
afternoon, then becoming east 5 to 15 knots late. Patchy dense
fog through early afternoon. Waves calm to 2 feet.
.TONIGHT...Northeast winds less than 10 knots backing north late.
Waves calm to 2 feet.
.SATURDAY...Southwest winds less than 10 knots veering north in
the afternoon, then increasing to 5 to 15 knots late. Waves calm
to 2 feet.
.SATURDAY NIGHT...North winds less than 10 knots becoming
southwest 5 to 15 knots after midnight. A slight chance of
showers. A slight chance of thunderstorms after midnight. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-102000-
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-
400 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.EARLY THIS MORNING...East winds less than 10 knots. Areas of
dense fog. Waves calm to 2 feet.
.TODAY...East winds less than 10 knots backing northeast in the
afternoon, then veering east late. Patchy dense fog through early
afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight, then becoming south less than 10 knots late. Waves calm
to 2 feet.
.SATURDAY...Southwest winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing south late. Waves calm to
2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. A slight chance of showers. A slight chance of
thunderstorms after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet.
.MONDAY...Southwest winds 20 to 30 knots increasing to gales to
35 knots. Waves subsiding to 2 to 4 feet, then building to 4 to
7 feet occasionally to 9 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-102000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.EARLY THIS MORNING...Southeast winds less than 10 knots. Areas
of dense fog. Waves calm to 2 feet.
.TODAY...Southeast winds less than 10 knots increasing to 5 to
15 knots late. Areas of dense fog through early afternoon. Waves
calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds less than 10 knots backing southeast
late. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
after midnight. A chance of showers and a slight chance of
thunderstorms after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet.
.MONDAY...Southwest winds 15 to 25 knots increasing to gales to
35 knots. Waves subsiding to 2 to 4 feet, then building to 5 to
8 feet occasionally to 10 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-102000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.EARLY THIS MORNING...East winds 5 to 15 knots. Areas of dense
fog. Waves calm to 2 feet.
.TODAY...East winds 5 to 15 knots. Areas of dense fog through
early afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. A slight chance of showers and
thunderstorms after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.MONDAY...West winds 10 to 20 knots becoming southwest 20 to
30 knots. Waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet.
.TUESDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-102000-
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-
400 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.EARLY THIS MORNING...North winds 5 to 15 knots. Areas of dense
fog. Waves calm to 2 feet.
.TODAY...East winds 5 to 15 knots diminishing to less than
10 knots late. Areas of dense fog through early afternoon. Waves
calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A slight chance of showers and
thunderstorms after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to gales to
35 knots. Waves building to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...West gales to 35 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-102000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EDT Fri Jul 10 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Areas of
dense fog. Waves calm to 2 feet.
.TODAY...North winds 5 to 15 knots backing northwest late. Patchy
dense fog through early afternoon. Waves calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots veering east after midnight,
then veering southeast late. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing east late.
Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...West winds 5 to 15 knots becoming southwest 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to calm to 2 feet.

$$

LSZ261-101400-
MAFOR 1009/
Superior West 11104 11200 19204 12100 12200 12100. Waves 1 foot
or less.

Superior North Central 13304 14300 11300. Waves 1 foot or less.

Superior South Central 11104 12204 12200 12300 11310. Waves 1
foot or less.

Superior East 12804 11100 12700 11800 11200 11300. 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