300
FZUS63 KMQT 281401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Fri Aug 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...

A 30.1 inch high pressure over Lake Superior this morning increases
to 30.2 inches later today over the Upper Great Lakes before
continuing into New England on Saturday. Saturday night, a low
pressure over the Central to Northern Plains deepens to 29.6 inches.
This low lifts north into the Canadian Prairies early next week,
with heights over Lake Superior subsequently falling to 29.8 inches
by Monday afternoon. Weak high pressure ridging of at least 29.8
inches returns to Lake Superior by Tuesday.



LSZ162-282000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Fri Aug 28 2026 /901 AM CDT Fri Aug 28 2026/

.REST OF TODAY...Northeast winds less than 10 knots becoming east
5 to 15 knots in the afternoon, then veering southeast late.
Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming northeast less
than 10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. A slight chance of
showers through midnight. Waves calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A slight chance of showers. A slight
chance of thunderstorms by mid afternoon. Waves building to 1 to
3 feet.
.SUNDAY NIGHT...Northeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of showers. Waves 1 to
3 feet.
.MONDAY...Northeast winds 10 to 20 knots becoming west 5 to
15 knots. Waves subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to 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-
1001 AM EDT Fri Aug 28 2026

.REST OF TODAY...Northeast winds less than 10 knots increasing to
5 to 15 knots in the afternoon, then veering south late. Waves
calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast late. A
chance of showers. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots backing southeast
after midnight. A slight chance of showers. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. A slight chance of showers. Waves calm
to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of showers. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots veering west. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to 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-
1001 AM EDT Fri Aug 28 2026

.REST OF TODAY...West winds less than 10 knots becoming south
5 to 15 knots late. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots diminishing to less than
10 knots late. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming southeast 5 to 15 knots
late. A slight chance of showers by mid afternoon. Waves calm to
2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots backing southeast
after midnight. A slight chance of showers through midnight.
Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. A slight chance of showers.
Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers. Waves building to
1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots becoming west 5 to
15 knots. A chance of showers. Waves building to 2 to 4 feet,
then subsiding to calm to 2 feet.
.TUESDAY...Southwest winds 15 to 25 knots becoming west 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ265-282000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EDT Fri Aug 28 2026

.REST OF TODAY...Southwest winds 5 to 15 knots backing east in
the afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming south 5 to
15 knots after midnight. 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. A chance of
showers and a slight chance of thunderstorms by mid afternoon.
Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. A slight chance of
showers through midnight. Waves calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. A slight chance of showers. Waves calm
to 2 feet.
.SUNDAY NIGHT...East winds 15 to 25 knots becoming southeast
10 to 20 knots after midnight. A chance of showers. Waves
building to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots becoming west 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet,
then subsiding to calm to 2 feet.
.TUESDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. 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-
1001 AM EDT Fri Aug 28 2026

.REST OF TODAY...West winds 5 to 15 knots backing east late.
Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then diminishing to 5 to 15 knots late. Patchy
fog after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. Patchy fog through early
afternoon. A slight chance of showers and thunderstorms by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. A slight chance of
thunderstorms through midnight. A slight chance of showers. Waves
calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. A slight chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots veering southeast after
midnight. A chance of showers. Waves building to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet,
then subsiding to calm to 2 feet.
.TUESDAY...West winds 10 to 20 knots. 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-
1001 AM EDT Fri Aug 28 2026

.REST OF TODAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TONIGHT...South winds less than 10 knots increasing to 10 to
20 knots. Patchy fog after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots backing southeast late.
Patchy fog through early afternoon. A slight chance of showers by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. A chance of showers and a slight
chance of thunderstorms. Waves calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots backing east by mid
afternoon. A chance of showers. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots veering southeast after
midnight. A chance of showers. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ261-282000-
MAFOR 2815/
Superior West 11100 15300 11300. Waves 1 foot or less.

Superior North Central 11600 11500 15400. Waves 1 foot or less.

Superior South Central 11500 12200 11310 12410 12400. Waves 1
foot or less.

Superior East 12600 11500 14400 11400. 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