121
FZUS63 KMQT 312001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Sun May 31 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...

High pressure of 30.0 inches remains over the Great Lakes this
afternoon. Another high pressure of 30.4 inches approaches the area
from Hudson Bay tonight through Monday, becoming centered over the
Great Lakes by Tuesday morning. The high weakens to 30.3 inches for
Tuesday night, then moves southeast to the Ohio River Valley on
Wednesday. Meanwhile, a 29.9 inch trough approaches from the
northwest, moving over Lake Superior on Thursday.



LSZ162-010800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Sun May 31 2026 /301 PM CDT Sun May 31 2026/

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming northeast less than
10 knots after midnight, then increasing to 5 to 15 knots late.
Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots increasing to 15 to
25 knots. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots late. Waves subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. A chance of showers. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots becoming west 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots backing northeast. Waves calm
to 2 feet.

$$

LSZ263-010800-
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-
401 PM EDT Sun May 31 2026

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast late. Waves
calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots becoming east 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...East 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 veering southwest after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. A chance of showers after midnight. Waves
building to 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 20 knots veering west. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.FRIDAY...West winds 5 to 15 knots backing east. Waves subsiding
to calm to 2 feet.

$$

LSZ264-010800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Sun May 31 2026

.LATE THIS AFTERNOON...Southwest winds less than 10 knots. Waves
calm to 2 feet.
.TONIGHT...West winds less than 10 knots backing east after
midnight, then increasing to 5 to 15 knots late. Waves calm to
2 feet.
.MONDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots becoming east less
than 10 knots after midnight. Waves calm to 2 feet.
.TUESDAY...East winds less than 10 knots veering southeast by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves building to 1 to 3 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering west. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.FRIDAY...West winds 5 to 15 knots backing east. Waves subsiding
to calm to 2 feet.

$$

LSZ265-010800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Sun May 31 2026

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots diminishing to less than
10 knots after midnight, then increasing to 5 to 15 knots late.
Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then diminishing to 5 to 15 knots late. Waves
calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots diminishing to less than
10 knots after midnight, then backing north late. Waves calm to
2 feet.
.TUESDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing southeast by
mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.THURSDAY...Southwest winds 15 to 25 knots veering west. A chance
of showers. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots becoming southeast 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ266-010800-
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-
401 PM EDT Sun May 31 2026

.LATE THIS AFTERNOON...North winds less than 10 knots. Waves calm
to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight, then veering east late. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then diminishing to 5 to 15 knots late. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots backing northwest
late. Waves calm to 2 feet.
.TUESDAY...North winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing southeast by
mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 2 to 4 feet.
.THURSDAY...South winds 10 to 20 knots becoming southwest 15 to
25 knots. A chance of showers. Waves subsiding to calm to 2 feet,
then building to 2 to 4 feet.
.FRIDAY...Northwest winds 10 to 20 knots becoming east 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ267-010800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Sun May 31 2026

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight, then veering east late. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots backing north late. Waves calm
to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.THURSDAY...South winds 10 to 20 knots veering southwest. A
chance of showers. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.
.FRIDAY...West winds 10 to 20 knots becoming east 5 to 15 knots.
Waves subsiding to calm to 2 feet.

$$

LSZ261-010200-
MAFOR 3121/
Superior West 11100 11200 13100 11110 12120. Waves 1 foot or less
tonight. Waves 1 to 3 feet building to 2 to 4 feet Monday.

Superior North Central 11500 11600 11800 12200 13210. Waves 2
feet or less.

Superior South Central 11200 11300 11100 13200 12210. Waves 2
feet or less.

Superior East 12700 11800 11110 13210 11110. 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