380
FZUS63 KMQT 021401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EDT Wed Sep 2 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...

The

A 29.8 inch low will continue to slowly move east over eastern
Ontario today reaching western Quebec by Thursday morning. A broad
29.9 inch trough over the Upper Great Lakes will shift east as the
low departs Ontario tonight and a 29.9 inch ridge will move into the
area, building to 30.0 inches by Friday afternoon. Ridging will
build to 30.1 inches for Sunday night and Monday.



LSZ162-022000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EDT Wed Sep 2 2026 /900 AM CDT Wed Sep 2 2026/

.REST OF TODAY...West winds 5 to 15 knots backing south late.
Waves calm to 2 feet.
.TONIGHT...West winds less than 10 knots becoming northeast 5 to
15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon, then becoming northeast 15 to 25 knots
late. A slight chance of showers by mid afternoon. Waves building
to 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots. A chance of
showers and thunderstorms. Waves subsiding to calm to 2 feet,
then building to 1 to 3 feet.
.FRIDAY...East winds 15 to 25 knots backing northeast by mid
afternoon. A slight chance of showers. Waves building to 2 to
4 feet.
.FRIDAY NIGHT...Northeast winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers and thunderstorms. Waves calm to
2 feet.
.SUNDAY...East winds 5 to 15 knots becoming northeast 15 to
25 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ263-022000-
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 Wed Sep 2 2026

.REST OF TODAY...Northwest winds less than 10 knots becoming west
5 to 15 knots in the afternoon, then backing southwest late.
Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming north less than
10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots becoming east 15 to
25 knots late. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of showers and a slight chance
of thunderstorms. Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots. A slight chance of showers.
Waves building to 1 to 3 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. A chance of showers and
thunderstorms. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming northeast 15 to
25 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ264-022000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EDT Wed Sep 2 2026

.REST OF TODAY...West winds 5 to 15 knots diminishing to less
than 10 knots in the afternoon, then becoming southwest 5 to
15 knots late. Waves calm to 2 feet.
.TONIGHT...West winds less than 10 knots veering north late.
Waves calm to 2 feet.
.THURSDAY...North winds less than 10 knots becoming northeast
5 to 15 knots in the afternoon, then veering east late. Waves
calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots veering southeast. A chance
of showers. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming northeast 15 to
25 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ265-022000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EDT Wed Sep 2 2026

.REST OF TODAY...West winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then veering north late. Waves calm to
2 feet.
.TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots veering east in the
afternoon, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. A slight chance of
showers after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots veering south. A chance of
showers. Waves calm to 2 feet.
.SUNDAY...South winds 10 to 20 knots backing southeast. A chance
of showers. Waves building to 1 to 3 feet.

$$

LSZ266-022000-
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 Wed Sep 2 2026

.REST OF TODAY...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots in the afternoon, then backing west late. Waves
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots veering northeast late.
Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots becoming south 10 to
20 knots. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet.

$$

LSZ267-022000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EDT Wed Sep 2 2026

.REST OF TODAY...West winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots veering northwest late.
Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots veering south. Waves calm to
2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.

$$

LSZ261-022000-
MAFOR 0215/
Superior West 11600 11500 11400 11500 11800 13100. Waves 1 foot
or less.

Superior North Central 14600 11600 11700 12800. Waves 1 foot or
less.

Superior South Central 11710 12800 14600 11700. Waves 1 foot or
less.

Superior East 11700 14600 13700. 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