052
FZUS63 KMQT 100251
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1051 PM EDT Thu Jul 9 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 tonight into Friday. 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.



LSZ162-101100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1051 PM EDT Thu Jul 9 2026 /951 PM CDT Thu Jul 9 2026/

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

.REST OF TONIGHT...North winds less than 10 knots. Areas of dense
fog. Waves calm to 2 feet.
.FRIDAY...North winds less than 10 knots becoming northeast 5 to
15 knots in the afternoon, then veering east late. Patchy dense
fog through early afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then backing north late. A slight
chance of showers and thunderstorms after midnight. Waves calm to
2 feet.
.SATURDAY...South winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds less than 10 knots becoming
southwest 5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots. Waves building to
1 to 3 feet.
.MONDAY...Southwest winds 20 to 30 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming north 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-101100-
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-
1051 PM EDT Thu Jul 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY...

.REST OF TONIGHT...North winds less than 10 knots backing west
after midnight, then backing east late. Areas of dense fog. Waves
calm to 2 feet.
.FRIDAY...East winds less than 10 knots backing northeast in the
afternoon, then veering east late. Areas of dense fog through
early afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight, then backing east late. A slight chance of showers and
thunderstorms after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 5 to 15 knots backing southeast by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
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
2 to 4 feet.
.MONDAY...Southwest winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-101100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1051 PM EDT Thu Jul 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY...

.REST OF TONIGHT...West winds less than 10 knots veering
northwest after midnight, then veering northeast late. Areas of
dense fog. Waves calm to 2 feet.
.FRIDAY...East winds less than 10 knots veering southeast in the
afternoon, then increasing to 5 to 15 knots late. Areas of dense
fog through early afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots. A chance of
showers. A slight chance of thunderstorms after midnight. Waves
calm to 2 feet.
.SATURDAY...Southeast winds less than 10 knots. Waves calm to
2 feet.
.SATURDAY NIGHT...Southeast winds less than 10 knots becoming
southwest 5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots becoming west 20 to
30 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding 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.

$$

LSZ265-101100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1051 PM EDT Thu Jul 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY...

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering west
after midnight, then veering north late. Patchy dense fog. Waves
calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots veering southeast late. Areas
of dense fog through early afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast 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.
.SATURDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south
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 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to 20 to
30 knots. Waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ266-101100-
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-
1051 PM EDT Thu Jul 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY...

.REST OF TONIGHT...Northwest winds 5 to 15 knots veering north
late. Areas of dense fog. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering southeast in the
afternoon. Areas of dense fog through early afternoon. Waves calm
to 2 feet.
.FRIDAY NIGHT...Southeast winds 5 to 15 knots. A slight chance of
showers after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south
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 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 20 to
30 knots. Waves building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-101100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1051 PM EDT Thu Jul 9 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY...

.REST OF TONIGHT...Northwest winds 5 to 15 knots. Areas of dense
fog. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing northwest in the
afternoon. Patchy dense fog through early afternoon. Waves calm
to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots veering south after
midnight, then backing southeast late. Waves calm to 2 feet.
.SATURDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. 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...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.
.TUESDAY...West winds 10 to 20 knots becoming northwest 5 to
15 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.

$$

LSZ261-101100-
MAFOR 1003/
Superior West 12804 11104 11200 19204 11200 11100 12200. Waves 1
foot or less.

Superior North Central 12704 11104 11204 11304 13300. Waves 1
foot or less.

Superior South Central 11600 19604 12804 11104 11204 11300 12310.
Waves 1 foot or less.

Superior East 12704 12804 11700 11600 11700 11800. Waves 1 foot
or less.

$$

NJL

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes