500
FZUS63 KMQT 060201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EDT Fri Jun 5 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 29.7 inch low over northern Ontario is extending 29.7 inch
troughing over the lake this evening. The low moves slowly east into
northern Quebec at 29.6 inches by early Saturday morning before
tracking southeastwards towards the St. Lawrence Seaway throughout
the rest of the day. Meanwhile, weak 29.9 inch ridging moves over
Lake Superior Saturday afternoon as a 29.3 inch low pressure forms
over the Northern Rockies. Ridging over Lake Superior builds to 30.1
inches by Sunday as the low stretches into the Northern Plains. By
Monday afternoon, expect Lake Superior to be between a 29.8 inch
trough over Minnesota and 30.2 inch high pressure over New England.
The troughing weakens to 29.9 inches before moving over Lake
Superior on Tuesday. Pressure continues to fall over Lake Superior
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 29.2 inches.



LSZ162-060800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Fri Jun 5 2026 /900 PM CDT Fri Jun 5 2026/

.REST OF TONIGHT...West winds 5 to 15 knots. A slight chance of
rain showers by midnight. Patchy fog. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest in the
afternoon, then backing east late. Patchy fog through early
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.SUNDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Northeast winds 10 to 20 knots. Waves subsiding
to 1 to 3 feet.
.MONDAY...Northeast winds 10 to 20 knots. A chance of showers
through early afternoon. A chance of thunderstorms. Showers by
mid afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. Showers likely
through midnight. A chance of thunderstorms. A chance of showers
after midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east. Waves calm
to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots. A chance of showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ263-060800-
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 Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering west
after midnight. A slight chance of rain showers by midnight.
Patchy dense fog. Waves calm to 2 feet.
.SATURDAY...West winds less than 10 knots backing southwest in
the afternoon, then increasing to 5 to 15 knots late. Patchy fog.
Waves calm to 2 feet.
.SATURDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A chance of showers. Waves building to 2 to
4 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots. Showers likely and
a chance of thunderstorms. Waves subsiding to 1 to 3 feet.
.TUESDAY...Northeast winds 5 to 15 knots veering east. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering southeast. A chance
of showers. Waves building to 1 to 3 feet.

$$

LSZ264-060800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EDT Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.REST OF TONIGHT...Southwest winds less than 10 knots becoming
west 5 to 15 knots after midnight, then becoming northwest less
than 10 knots late. A slight chance of showers and thunderstorms
by midnight. Areas of dense fog. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Areas of dense fog through early afternoon, then
patchy fog by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds less than 10 knots backing east
after midnight. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots. Waves building to 2 to
4 feet.
.MONDAY NIGHT...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of showers through
midnight. Showers likely after midnight. Waves 2 to 4 feet.
.TUESDAY...Southeast winds 5 to 15 knots diminishing to less than
10 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves building to 2 to 4 feet.

$$

LSZ265-060800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EDT Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.REST OF TONIGHT...South winds 5 to 15 knots veering west after
midnight. Areas of dense fog. A slight chance of thunderstorms by
midnight. A slight chance of showers. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots veering north late.
Patchy fog through early afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds less than 10 knots veering east
after midnight, then increasing to 5 to 15 knots late. Waves calm
to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of showers through
midnight. Showers likely after midnight. Waves subsiding to 1 to
3 feet.
.TUESDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ266-060800-
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 Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering
northwest late. Areas of dense fog. A slight chance of
thunderstorms by midnight. A slight chance of rain showers. Waves
calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. Patchy fog. Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight, then veering east late. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots. Waves calm to
2 feet.
.MONDAY...Southeast winds 15 to 25 knots. Waves building to 2 to
4 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of showers. Waves 2 to
4 feet.
.TUESDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Waves building to 2 to 4 feet.

$$

LSZ267-060800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EDT Fri Jun 5 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT SATURDAY...

.REST OF TONIGHT...Southwest winds 5 to 15 knots veering
northwest after midnight, then backing west late. Areas of dense
fog. A chance of rain showers. Waves calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots. Patchy fog. Waves calm to
2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight, then veering east late. Waves calm
to 2 feet.
.SUNDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots. A chance of
showers after midnight. Waves subsiding to 2 to 4 feet.
.TUESDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ261-060800-
MAFOR 0603/
Superior West 12600 11700 11600 11500 11400 11300 11200. Waves 1
foot or less.

Superior North Central 11504 11604 12704 11700 13600. Waves 1
foot or less.

Superior South Central 11504 11604 11704 14710 11700. Waves 1
foot or less.

Superior East 11604 11704 11604 11704 11710 11710 19714 12710. A
chance of showers late this evening. Waves 2 feet 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