909
FZUS63 KMQT 072001
GLFLS

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



LSZ162-080800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Sun Jun 7 2026 /300 PM CDT Sun Jun 7 2026/

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...Northeast winds 10 to 20 knots. A slight chance of
showers and thunderstorms after midnight. Waves subsiding to 1 to
3 feet.
.MONDAY...Northeast winds 10 to 20 knots. Showers likely and a
slight chance of thunderstorms. Waves subsiding to calm to
2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. A slight chance of
thunderstorms through midnight. A chance of showers. Waves calm
to 2 feet.
.TUESDAY...East winds 5 to 15 knots backing northeast 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. A chance of showers
through early afternoon. A chance of thunderstorms. Showers by
mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Showers likely and a chance of
thunderstorms through midnight. Waves building to 2 to 4 feet.
.THURSDAY...Southwest gales to 35 knots becoming west 20 to
30 knots. A chance of showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Southwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to calm to 2 feet.

$$

LSZ263-080800-
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-
400 PM EDT Sun Jun 7 2026

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Waves 1 to
3 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 backing northeast late. A
chance of showers through early afternoon. A slight chance of
thunderstorms. Showers likely by mid afternoon. Waves calm to
2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots becoming northeast less
than 10 knots late. Showers likely and a slight chance of
thunderstorms through midnight, then a chance of showers after
midnight. Waves building to 1 to 3 feet, then subsiding to 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...East winds 5 to 15 knots. A chance of showers
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. A chance of showers through early
afternoon. A chance of thunderstorms. Showers likely by mid
afternoon. Waves building to 2 to 4 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Showers likely through midnight.
Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southwest gales to 35 knots becoming west 20 to
30 knots. A chance of showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...Southwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 1 to 3 feet.

$$

LSZ264-080800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Sun Jun 7 2026

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Areas of dense
fog. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots 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 chance of showers. Waves building to
1 to 3 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Showers likely and a slight chance
of thunderstorms. Waves 1 to 3 feet.
.TUESDAY...East winds less than 10 knots. A slight chance of rain
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 increasing to 15 to
25 knots by mid afternoon. A chance of showers. A chance of
thunderstorms by mid afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Showers likely through midnight.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southwest winds 20 to 30 knots. A chance of showers.
Waves building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...Southwest winds 20 to 30 knots diminishing to 10 to
20 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 1 to 3 feet.

$$

LSZ265-080800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Sun Jun 7 2026

.LATE THIS AFTERNOON...Southeast winds 15 to 25 knots. Patchy
dense fog. Waves 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. 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 late. A chance of showers through midnight. A
slight chance of thunderstorms. Showers likely after midnight.
Waves subsiding to calm to 2 feet.
.TUESDAY...South winds 5 to 15 knots backing east by mid
afternoon. A chance of showers and a slight chance of
thunderstorms through early afternoon. Waves 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. A chance of showers.
A chance of thunderstorms by mid afternoon. Waves building to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...South winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of showers. Waves
subsiding to 2 to 4 feet.
.THURSDAY...Southwest winds 15 to 25 knots veering west. A chance
of showers. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ266-080800-
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-
400 PM EDT Sun Jun 7 2026

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Southeast winds 10 to 20 knots. 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. A slight chance of showers by mid
afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots. A chance of
showers through midnight. A slight chance of thunderstorms.
Showers likely after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Showers likely through early afternoon. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 15 to 25 knots. A chance of showers.
A chance of thunderstorms by mid afternoon. Waves building to
3 to 6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...South winds 20 to 30 knots. A chance of
showers. Waves 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 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.
.FRIDAY...West winds 15 to 25 knots becoming southwest 10 to
20 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ267-080800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Sun Jun 7 2026

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. 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 10 to 20 knots. Waves building to 1 to
3 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. A chance of showers through midnight, then showers likely
and a slight chance of thunderstorms after midnight. Waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Showers likely and a slight chance of
thunderstorms through early afternoon, then a slight chance of
showers by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 10 to 20 knots. Waves calm to
2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of showers and thunderstorms.
Waves building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southwest winds 10 to 20 knots. A chance of showers.
Waves subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ261-080200-
MAFOR 0721/
Superior West 12130 11220 13210 11216 11116. Waves 2 to 4 feet
tonight. Waves 1 to 3 feet Monday.

Superior North Central 11314 13320 11310 13320. Waves 1 to 3
feet.

Superior South Central 11324 12320 11310 13320 11330. Waves 1 to
3 feet.

Superior East 11200 11210 13310 13320. Waves 2 feet or less
tonight. Waves 1 to 3 feet Monday.

$$

WFO MQT

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weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes