680
FZUS63 KMQT 071401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EDT Sun Jun 7 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...

Ridging of 30.1 inches over Lake Superior this morning weakens to
30.0 inches through tonight as a 29.4 inch low over the Black Hills
expands into the Northern Plains and Canadian Prairies at 29.3
inches. By Monday afternoon, expect Lake Superior to be between a
29.7 inch trough over Minnesota and 30.2 inch high pressure over New
England. The troughing weakens to around 29.9 inches before moving
over Lake Superior on Tuesday. Pressure continues to fall over the
lake through Wednesday as a Colorado low lifts through the Northern
Plains towards Lake Winnipeg, strengthening to 29.6 inches by
Wednesday night as the low deepens to 29.1 inches over far northern
Ontario. Another Colorado low lifts into the western Great Lakes at
around 29.5 inches by late Thursday.



LSZ162-072000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EDT Sun Jun 7 2026 /900 AM CDT Sun Jun 7 2026/

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

.REST OF TODAY...Northeast winds 10 to 20 knots increasing to
15 to 25 knots late. Patchy fog by late morning. Waves calm to
2 feet building to 2 to 4 feet.
.TONIGHT...Northeast winds 10 to 20 knots veering east late. A
slight chance of rain showers after midnight. Waves subsiding to
calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A chance of showers through early
afternoon. A slight chance of thunderstorms. Showers likely by
mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. Rain showers
likely and a slight chance of thunderstorms through midnight,
then a slight chance of rain showers after midnight. Waves calm
to 2 feet.
.TUESDAY...Northeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots becoming southwest 15 to
25 knots. Showers and a chance of thunderstorms. Waves building
to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southwest winds 20 to 30 knots. A chance of showers.
Waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ263-072000-
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 7 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...East winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Patchy fog by late morning. Waves calm
to 2 feet building to 2 to 4 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast after
midnight, then becoming east 5 to 15 knots late. Waves subsiding
to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots. A chance of showers. A slight
chance of thunderstorms by mid afternoon. Waves building to 1 to
3 feet.
.MONDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight. Rain showers likely through midnight. A slight chance
of thunderstorms. A chance of rain showers after midnight. Waves
subsiding to calm to 2 feet.
.TUESDAY...Northeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. A slight chance of showers through
early afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. A chance of showers and thunderstorms after midnight.
Waves calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots becoming southwest 15 to
25 knots. A chance of showers and thunderstorms. Waves building
to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Southwest winds 20 to 30 knots. A chance of showers.
Waves building to 5 to 9 feet occasionally to 11 feet.

$$

LSZ264-072000-
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 7 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

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

$$

LSZ265-072000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EDT Sun Jun 7 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

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

$$

LSZ266-072000-
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 7 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.REST OF TODAY...Southeast winds 5 to 15 knots backing east in
the afternoon. Areas of dense fog. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast after
midnight. Patchy fog through midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers through midnight. A slight chance of thunderstorms.
Showers after midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. A slight chance of thunderstorms through early
afternoon. A chance of showers. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...East winds 10 to 20 knots veering southeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 15 to 25 knots becoming south 20 to
30 knots. A chance of showers and thunderstorms. Waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
6 feet occasionally to 8 feet.
.THURSDAY...South winds 15 to 25 knots becoming southwest 20 to
30 knots. A chance of showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 4 to 7 feet occasionally
to 9 feet.

$$

LSZ267-072000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EDT Sun Jun 7 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

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

$$

LSZ261-072000-
MAFOR 0715/
Superior West 12120 12130 11220 13210. A chance of showers Monday
morning. 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 11314 12214 13320 11310 11320. Waves 2
feet or less this afternoon. Waves 1 to 3 feet tonight and Monday
morning.

Superior South Central 12220 11224 12320 11310 12320. Waves 2
feet or less this afternoon. Waves 1 to 3 feet tonight and Monday
morning.

Superior East 11204 12100 11210 13310 11320. Waves 2 feet or less
this afternoon and tonight. Waves 2 to 3 feet Monday morning.

$$

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