571
FZUS63 KMQT 281401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EDT Sun Jun 28 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...

Through this afternoon, a 29.4 low will wrap to the northeast then
northwest to southern Saskatchewan, deepening to 20.3 inches while a
30.1 inch high remains stationary and holds strength over the Hudson
Bay. By tomorrow morning, the high will shift southeast to the east
of Lake Erie as the Saskatchewan low regresses southwest at 29.5
inches to Montana while another low at 29.4 inches moves from
Colorado to the Northern Plains. The 2nd low moves to southern
Manitoba tomorrow night as high pressure shifts off the East Coast,
still at 30.1 inches. Tuesday, the low shifts north to Lake Winnipeg
and deepens to 29.2 inches. The low then weakens to 29.4 inches as
it crosses northern Ontario by midday Wednesday. As the low shifts
east through Thursday, weak high pressure around 30.0 inches expands
over much of the eastern CONUS.



LSZ162-282000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EDT Sun Jun 28 2026 /900 AM CDT Sun Jun 28 2026/

.REST OF TODAY...Northeast winds 10 to 20 knots increasing to
15 to 25 knots in the afternoon, then veering east late. A slight
chance of showers. A slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet building to 2 to 4 feet.
.TONIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A chance of showers after midnight.
Waves subsiding to 1 to 3 feet.
.MONDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots late. A chance of showers. A chance of thunderstorms by
mid afternoon. Waves subsiding to calm to 2 feet, then building
to 2 to 4 feet.
.MONDAY NIGHT...Northeast winds 15 to 25 knots becoming east 5 to
15 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A chance of showers after midnight.
Waves subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A slight chance of showers and
thunderstorms by mid afternoon. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of showers. Waves calm to
2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots backing northeast. A chance
of showers and thunderstorms. Waves calm to 2 feet.

$$

LSZ263-282000-
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 AM EDT Sun Jun 28 2026

.REST OF TODAY...East winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet building to 2 to 4 feet.
.TONIGHT...East winds 15 to 25 knots becoming southeast 10 to
20 knots after midnight, then becoming east 5 to 15 knots late. A
chance of showers and thunderstorms. Waves subsiding to 1 to
3 feet.
.MONDAY...East winds 5 to 15 knots increasing to 15 to 25 knots
late. A chance of showers. A slight chance of thunderstorms by
mid afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...East winds 15 to 25 knots becoming south 10 to
20 knots after midnight. Showers likely and a chance of
thunderstorms. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.TUESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A slight chance of showers and
thunderstorms by mid afternoon. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of
showers. Waves building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A chance of showers.
Waves building to 2 to 4 feet, then subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots backing northeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ264-282000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EDT Sun Jun 28 2026

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

$$

LSZ265-282000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EDT Sun Jun 28 2026

.REST OF TODAY...East winds 10 to 20 knots increasing to 20 to
30 knots. Waves calm to 2 feet building to 2 to 4 feet.
.TONIGHT...Southeast winds 15 to 25 knots. A slight chance of
showers through midnight. A chance of thunderstorms. Showers
after midnight. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.MONDAY...Southeast winds 15 to 25 knots. A chance of showers and
a slight chance of thunderstorms through early afternoon. Waves
building to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Southeast winds 20 to 30 knots becoming south
15 to 25 knots after midnight. A chance of showers through
midnight. A slight chance of thunderstorms. Showers likely after
midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers and a slight chance of
thunderstorms by mid afternoon. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Southwest winds 15 to 25 knots. A chance of
showers. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A chance of showers.
Waves calm to 2 feet.
.THURSDAY...East winds 10 to 20 knots becoming south 5 to
15 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-282000-
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 AM EDT Sun Jun 28 2026

.REST OF TODAY...Southeast winds 10 to 20 knots backing east in
the afternoon. Waves calm to 2 feet building to 1 to 3 feet.
.TONIGHT...Southeast winds 10 to 20 knots increasing to 20 to
30 knots. A chance of showers. A chance of thunderstorms after
midnight. Waves building to 2 to 4 feet.
.MONDAY...Southeast winds 20 to 30 knots diminishing to 15 to
25 knots late. A chance of showers and a slight chance of
thunderstorms through early afternoon. Waves building to 3 to
5 feet occasionally to 7 feet.
.MONDAY NIGHT...Southeast winds 20 to 30 knots becoming south
15 to 25 knots after midnight. A chance of showers through
midnight. A slight chance of thunderstorms. Showers likely after
midnight. Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...South winds 10 to 20 knots. A chance of showers and a
slight chance of thunderstorms. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. A chance of showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing south. A
chance of showers. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ267-282000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EDT Sun Jun 28 2026

.REST OF TODAY...Southeast winds 5 to 15 knots backing east in
the afternoon, then increasing to 10 to 20 knots late. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A slight chance of showers and
thunderstorms after midnight. Waves building to 2 to 4 feet.
.MONDAY...Southeast winds 15 to 25 knots. A chance of showers and
a slight chance of thunderstorms. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. A chance of showers through midnight. A slight
chance of thunderstorms. Showers likely after midnight. Waves
subsiding to 2 to 4 feet.
.TUESDAY...South winds 10 to 20 knots. A chance of showers and a
slight chance of thunderstorms. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight. A chance of showers and
thunderstorms. Waves building to 2 to 4 feet, then subsiding to
1 to 3 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing south. A
chance of showers. Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots backing southeast. A chance
of showers. Waves calm to 2 feet.

$$

LSZ261-282000-
MAFOR 2815/
Superior West 11220 11130 11230 11220 12226 12210. A chance of
thunderstorms tonight. Waves 1 to 3 feet building to 2 to 4 feet
this afternoon. Waves 2 to 4 feet tonight. Waves 1 to 3 feet
Monday morning.

Superior North Central 11210 12220 12320 12326 11320. A chance of
thunderstorms overnight. Waves 1 to 3 feet this afternoon and
tonight. Waves 2 to 4 feet building to 3 to 5 feet Monday
morning.

Superior South Central 11220 12230 11330 11320 12336 11330. A
chance of thunderstorms overnight and Monday morning. Waves 1 to
2 feet building to 2 to 4 feet this afternoon. Waves 2 to 4 feet
tonight. Waves 3 to 5 feet Monday morning.

Superior East 11300 12210 14320 11326. Waves 1 foot or less this
afternoon. Waves 1 to 3 feet building to 2 to 4 feet tonight.
Waves 2 to 4 feet Monday morning.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes