345
FZUS63 KMQT 301401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Sat May 30 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 30.4 inch high pressure over northern Ontario will weaken
throughout the day, becoming 30.2 inches over the Upper Great Lakes
tonight. The high remains over the area into tomorrow while
progressively weakening with time, eventually becoming around 30.0
inches by late tomorrow as another 30.4 inch high approaches the
area from Hudson Bay. This second high settles north of the Great
Lakes Monday before arriving over the lake by Tuesday. The high
moves over the Lower Great Lakes at 30.2 inches Wednesday evening as
a 29.9 inch trough moves over the Northern Plains. This trough moves
near Lake Superior Thursday, strengthening to 29.7 inches.



LSZ162-302000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Sat May 30 2026 /901 AM CDT Sat May 30 2026/

.REST OF TODAY...Northeast winds 15 to 25 knots increasing to
20 to 30 knots in the afternoon. Waves 3 to 6 feet occasionally
to 8 feet.
.TONIGHT...Northeast winds 20 to 30 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots backing northeast after
midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering southwest. A chance
of showers. Waves calm to 2 feet.

$$

LSZ263-302000-
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-
1001 AM EDT Sat May 30 2026

.REST OF TODAY...East winds 10 to 20 knots becoming northeast
15 to 25 knots in the afternoon, then increasing to 20 to
30 knots late. Waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...East winds 20 to 30 knots diminishing to 5 to 15 knots
after midnight, then veering south late. Waves subsiding to calm
to 2 feet.
.SUNDAY...South winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing east late. Waves calm to
2 feet.
.SUNDAY NIGHT...East winds less than 10 knots increasing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots. Waves building to 2 to
4 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots veering southwest. Waves calm
to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing south. A
chance of showers. Waves calm to 2 feet.

$$

LSZ264-302000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EDT Sat May 30 2026

.REST OF TODAY...East winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves 2 to 4 feet subsiding to 1 to
3 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight, then becoming south less than 10 knots late. Waves
subsiding to calm to 2 feet.
.SUNDAY...South winds less than 10 knots veering southwest in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South 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...East winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots veering south. Waves calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots. A chance of showers.
Waves building to 1 to 3 feet.

$$

LSZ265-302000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EDT Sat May 30 2026

.REST OF TODAY...East winds 15 to 25 knots. Waves 2 to 4 feet.
.TONIGHT...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering south late. Waves subsiding
to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing east in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.TUESDAY...East winds 5 to 15 knots veering south. Waves calm to
2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

LSZ266-302000-
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-
1001 AM EDT Sat May 30 2026

.REST OF TODAY...East winds 10 to 20 knots. Waves 1 to 3 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. Waves
subsiding to calm to 2 feet.
.SUNDAY...South winds less than 10 knots backing north late.
Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds less than 10 knots becoming
northeast 5 to 15 knots after midnight. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.TUESDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots. Waves building to 2 to
4 feet.

$$

LSZ267-302000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EDT Sat May 30 2026

.REST OF TODAY...East winds 5 to 15 knots backing northeast in
the afternoon. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. Waves
calm to 2 feet.
.SUNDAY...Southeast winds less than 10 knots veering northwest in
the afternoon, then increasing to 5 to 15 knots late. Waves calm
to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...North winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots veering south. Waves calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. Waves building to 2 to 4 feet.

$$

LSZ261-302000-
MAFOR 3015/
Superior West 11130 13140 11230 11210 12200. Waves 3 to 6 feet
this afternoon. Waves 3 to 6 feet subsiding to 2 to 3 feet
tonight. Waves 1 to 2 feet Sunday morning.

Superior North Central 13220 11210 12300 12400. Waves 2 to 4 feet
this afternoon. Waves 1 to 3 feet tonight. Waves 1 foot or less
Sunday morning.

Superior South Central 12230 11220 12310 11300 12400. Waves 2 to
4 feet this afternoon. Waves 1 to 3 feet tonight. Waves 1 foot or
less Sunday morning.

Superior East 11210 11110 11100 11200 12300 11400 11300. 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