445
FZUS63 KMQT 030201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM 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...

29.9 inch ridge is expanding from Manitoba into the Upper Great
Lakes as a 29.8 inch trough continues to slide eastward. The ridge
remains over the area through Friday while building to 30.0 inches.
Ridging will continue to build to 30.1 inches by Sunday night and
persist through Monday afternoon.



LSZ162-030800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Wed Sep 2 2026 /900 PM CDT Wed Sep 2 2026/

.REST OF TONIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Northeast winds 5 to 15 knots becoming east 15 to
25 knots in the afternoon, then becoming northeast 20 to 30 knots
late. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. A chance of showers and a slight
chance of thunderstorms. Waves subsiding to 1 to 3 feet.
.FRIDAY...Northeast winds 15 to 25 knots. A slight chance of
showers through early afternoon. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...Northeast winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. A slight chance of showers and
thunderstorms through midnight. Waves subsiding to calm to
2 feet.
.SATURDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet.
.MONDAY...East gales to 35 knots. A chance of showers. Showers
likely. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ263-030800-
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 PM EDT Wed Sep 2 2026

.REST OF TONIGHT...West winds less than 10 knots veering
northeast late. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then becoming east 20 to 30 knots
late. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A slight chance of showers through
midnight. A slight chance of thunderstorms. A chance of showers
after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. A slight chance of showers through early
afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...East winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. A slight chance of showers and
thunderstorms through midnight. Waves subsiding to calm to
2 feet.
.SATURDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. A chance of showers. A chance of thunderstorms
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming east 15 to 25 knots.
A chance of showers. Waves building to 2 to 4 feet.
.MONDAY...East gales to 35 knots becoming southeast 20 to
30 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ264-030800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EDT Wed Sep 2 2026

.REST OF TONIGHT...West winds less than 10 knots veering north
late. Waves calm to 2 feet.
.THURSDAY...Northeast winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then veering east 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 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of showers through early
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. A slight chance of
showers after midnight. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 5 to 15 knots. A chance of
showers after midnight. Waves calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.
.MONDAY...East winds 20 to 30 knots becoming southeast 15 to
25 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ265-030800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EDT Wed Sep 2 2026

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots veering northeast in the
afternoon, then becoming east 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. A slight chance of showers through early
afternoon. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A slight chance of showers. Waves
subsiding to calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southeast winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...Southeast winds 10 to 20 knots veering south. A chance
of showers. Waves calm to 2 feet.
.MONDAY...East winds 20 to 30 knots veering southeast. A chance
of showers. Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ266-030800-
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 PM EDT Wed Sep 2 2026

.REST OF TONIGHT...West winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...North winds 5 to 15 knots veering northeast in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots veering east
after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots. A slight chance of showers
through early 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. 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 10 to 20 knots. A chance of showers. Waves
building to 1 to 3 feet.
.MONDAY...East winds 15 to 25 knots becoming southeast 20 to
30 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ267-030800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EDT Wed Sep 2 2026

.REST OF TONIGHT...Northwest winds 5 to 15 knots backing west
after midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots veering north late.
Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering east late.
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. Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots becoming south 10 to
20 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Southeast winds 10 to 20 knots veering south. A chance
of showers. Waves building to 1 to 3 feet.
.MONDAY...East winds 10 to 20 knots becoming southeast 15 to
25 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ261-030800-
MAFOR 0303/
Superior West 14100 11210 11120 11130 11230. Waves 2 feet or
less.

Superior North Central 11600 11700 12800 12100 12200. Waves 1
foot or less.

Superior South Central 11500 12600 11800 11100 11110 12210. Waves
1 foot or less.

Superior East 13600 12700 13800. 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