189
FZUS63 KMQT 310801
GLFLS

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

A 30.2 inch high pressure gradually weakens today to 30.0 inches.
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 on Wednesday to the Ohio River Valley.
Meanwhile, a 29.9 inch trough approaches from the northwest, moving
over Lake Superior on Thursday.



LSZ162-312000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Sun May 31 2026 /301 AM CDT Sun May 31 2026/

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TODAY...East winds 5 to 15 knots backing northeast in the
afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing north late. Waves
calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots late. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to 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 becoming north
less than 10 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots. 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 calm to 2 feet.

$$

LSZ263-312000-
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 AM EDT Sun May 31 2026

.EARLY THIS MORNING...South winds less than 10 knots. Waves calm
to 2 feet.
.TODAY...South winds less than 10 knots becoming southwest 5 to
15 knots in the afternoon, then backing northeast late. Waves
calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots. 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 5 to 15 knots. 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 10 to 20 knots becoming south 5 to
15 knots. A chance of showers. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering northwest. A
chance of showers. Waves 1 to 3 feet.

$$

LSZ264-312000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EDT Sun May 31 2026

.EARLY THIS MORNING...South winds less than 10 knots. Waves calm
to 2 feet.
.TODAY...South winds less than 10 knots veering southwest in the
afternoon. Waves calm to 2 feet.
.TONIGHT...Southwest winds less than 10 knots backing east after
midnight. 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 backing south. Waves
calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering northwest. A
chance of showers. Waves building to 1 to 3 feet.

$$

LSZ265-312000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EDT Sun May 31 2026

.EARLY THIS MORNING...South winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Southwest winds 5 to 15 knots backing southeast in the
afternoon, then backing east late. 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. 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...Southeast winds 5 to 15 knots becoming southwest
10 to 20 knots. Waves calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots veering west. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-312000-
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 AM EDT Sun May 31 2026

.EARLY THIS MORNING...South winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...South winds less than 10 knots veering southwest in the
afternoon, then veering north late. Waves calm to 2 feet.
.TONIGHT...North winds less than 10 knots becoming east 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 becoming northeast 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 veering east 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. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots. 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.

$$

LSZ267-312000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EDT Sun May 31 2026

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...South winds less than 10 knots veering west in the
afternoon, then becoming northwest 5 to 15 knots late. Waves calm
to 2 feet.
.TONIGHT...Northwest winds less than 10 knots increasing to 5 to
15 knots 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 veering northeast after
midnight. Waves calm to 2 feet.
.TUESDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots. Waves building to 1 to 3 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.

$$

LSZ261-311400-
MAFOR 3109/
Superior West 11200 11300 12200 11100 12200 11800. Waves 1 to 3
feet subsiding to 1 foot or less today. Waves 1 foot or less
tonight.

Superior North Central 12400 14500 11400 11200. Waves 1 foot or
less.

Superior South Central 13400 11300 11200 11300 11400 11200. Waves
1 foot or less.

Superior East 12400 11500 11600 13700 11800. 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