508
FZUS63 KMQT 271401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EDT Sat Jun 27 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...

Through this afternoon, 30.1 inch high will extend from the Upper
Great Lakes to eastern Hudson Bay while low pressure of at least
29.5 inches develops over the High Plains. Into Sunday morning, the
low consolidates to around 29.4 inches over southern Saskatchewan as
the high retreats to Hudson Bay, remaining at 30.1 inches. The low
pushes into Manitoba and the Dakotas early Monday morning while the
high shifts southeast to just east of the Lower Great Lakes. Tuesday
into Wednesday, the low moves through northern Ontario at around
29.5 inches as 30.1 inch high pressure extends over much of the East
Coast. By Thursday morning, the low will move east through Quebec
while 30.1 inch high pressure builds south of the Great Lakes.



LSZ162-272000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EDT Sat Jun 27 2026 /900 AM CDT Sat Jun 27 2026/

.REST OF TODAY...East winds 5 to 15 knots becoming northeast
10 to 20 knots in the afternoon. Waves calm to 2 feet building to
1 to 3 feet.
.TONIGHT...Northeast winds 10 to 20 knots veering east late.
Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of showers by mid afternoon. Waves
building to 2 to 4 feet.
.SUNDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Showers and a chance of thunderstorms.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 1 to 3 feet.
.MONDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. A chance of showers and thunderstorms.
Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northeast winds 15 to 25 knots becoming southwest
5 to 15 knots after midnight. A chance of showers. Waves
subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers and thunderstorms. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots. A chance of showers and thunderstorms. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ263-272000-
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 Sat Jun 27 2026

.REST OF TODAY...East winds less than 10 knots becoming northeast
5 to 15 knots in the afternoon, then increasing to 10 to 20 knots
late. Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 15 to 25 knots.
A slight chance of showers by mid afternoon. Waves building to
2 to 4 feet.
.SUNDAY NIGHT...East winds 15 to 25 knots veering southeast after
midnight. Showers likely and a slight chance of thunderstorms.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.MONDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. A slight chance of showers and
thunderstorms. Waves 2 to 4 feet.
.MONDAY NIGHT...East winds 10 to 20 knots veering southwest after
midnight. A chance of showers and thunderstorms. Waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.TUESDAY...Southwest winds 10 to 20 knots. A chance of showers
and thunderstorms. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers and thunderstorms. Waves subsiding
to calm to 2 feet.

$$

LSZ264-272000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EDT Sat Jun 27 2026

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

$$

LSZ265-272000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EDT Sat Jun 27 2026

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

$$

LSZ266-272000-
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 Sat Jun 27 2026

.REST OF TODAY...East winds less than 10 knots increasing to 5 to
15 knots late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
late. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...Southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. A chance of showers through
midnight, then showers likely and a slight chance of
thunderstorms after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Southeast winds 20 to 30 knots. A chance of showers and
a slight chance of thunderstorms. Waves 3 to 6 feet occasionally
to 8 feet.
.MONDAY NIGHT...Southeast winds 20 to 30 knots becoming south
15 to 25 knots after midnight. A chance of showers and
thunderstorms. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.TUESDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. A chance of showers and thunderstorms. Waves subsiding
to calm to 2 feet, then building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.

$$

LSZ267-272000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EDT Sat Jun 27 2026

.REST OF TODAY...East winds less than 10 knots backing north in
the afternoon, then increasing to 5 to 15 knots late. Waves calm
to 2 feet.
.TONIGHT...East winds less than 10 knots 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
late. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 15 to 25 knots. A chance of
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Southeast winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. A chance of showers and a slight
chance of thunderstorms. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. A chance of showers. Waves subsiding to 2 to
4 feet.
.TUESDAY...South 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.
.WEDNESDAY...Southwest winds 5 to 15 knots backing south. A
chance of showers. Waves subsiding to calm to 2 feet.

$$

LSZ261-272000-
MAFOR 2715/
Superior West 11100 11110 11120 12220 11310 12210. Waves 2 feet
or less this afternoon. Waves 1 to 3 feet tonight and Sunday
morning.

Superior North Central 11300 11200 12210 14310. Waves 1 foot or
less.

Superior South Central 11200 12210 12310 12300 11320. Waves 1
foot or less.

Superior East 11200 12800 11100 11200 11300 11200 11210. 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