259
FZUS63 KMQT 302001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM 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 30.3 inch high pressure over northern Ontario will weaken
throughout today, 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.



LSZ162-310800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Sat May 30 2026 /301 PM CDT Sat May 30 2026/

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Waves 3 to
5 feet occasionally to 7 feet.
.TONIGHT...Northeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...North winds 5 to 15 knots veering northeast late.
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 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...Northeast 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. 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.

$$

LSZ263-310800-
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 Sat May 30 2026

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Waves 3 to
5 feet occasionally to 7 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots 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...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 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 backing northeast 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 10 to 20 knots becoming south 5 to
15 knots. A chance of showers. Waves building to 1 to 3 feet.
.THURSDAY...Southwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of showers. Waves 1 to 3 feet.

$$

LSZ264-310800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Sat May 30 2026

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves 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...Southwest winds less than 10 knots. Waves calm to
2 feet.
.SUNDAY NIGHT...South 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 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...Southeast winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing south. Waves
building to 1 to 3 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering west. A chance
of showers. Waves 1 to 3 feet.

$$

LSZ265-310800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Sat May 30 2026

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming south 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing southeast in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...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. Waves calm to 2 feet.
.MONDAY NIGHT...Northeast 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 south 10 to
20 knots. Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots becoming southwest 15 to
25 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-310800-
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 Sat May 30 2026

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west late. Waves
calm to 2 feet.
.SUNDAY NIGHT...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 backing northeast by mid
afternoon. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.TUESDAY...East winds 5 to 15 knots becoming southeast less than
10 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...South winds 5 to 15 knots. 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.
.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.

$$

LSZ267-310800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Sat May 30 2026

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering south late. Waves
calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering northwest late.
Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots veering northeast
late. Waves calm to 2 feet.
.MONDAY...East winds 5 to 15 knots becoming north 10 to 20 knots
by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots veering northeast after
midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots veering south after
midnight. 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 veering southwest. A
chance of showers. Waves subsiding to calm to 2 feet, then
building to 2 to 4 feet.

$$

LSZ261-310200-
MAFOR 3021/
Superior West 12130 11120 11210 11200 13300. Waves 3 to 5 feet
subsiding to 2 to 4 feet tonight. Waves 2 feet or less Sunday.

Superior North Central 12210 12300 11400 13500. Waves 1 to 3 feet
tonight. Waves 1 foot or less Sunday.

Superior South Central 11210 11310 11300 14400 11300. Waves 1 to
3 feet tonight. Waves 1 foot or less Sunday.

Superior East 11100 11200 11300 12400 12500 11600. 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