755
FZUS63 KMQT 262001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Tue May 26 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...

Tonight, weak ridging of 30.1 inches builds in over Lake Superior
thanks to a 30.4 inch high over the western shores of Hudson Bay.
This parent high shifts southward over Lake Superior on Thursday,
causing pressure to increase to 30.3 inches. On Friday, the high
weakens to around 30.1 inches as it continues its southerly
propagation. Following this, a second ridge pushing in from Hudson
Bay brings 30.1 inch ridging back over Lake Superior late on Friday,
with pressure increasing once again to 30.3 inches by Saturday
midday as the parent high over Hudson Bay propogates south. High
pressure over Lake Superior remains until Sunday evening and
decreases to 30.1 inches Sunday night as the parent high moves
toward the lower Great Lakes.


LSZ162-270800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Tue May 26 2026 /301 PM CDT Tue May 26 2026/

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots veering east in the
afternoon, then backing northeast late. Waves building to 2 to
4 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots backing west after
midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 2 to 4 feet.
.SATURDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots backing northeast. Waves calm
to 2 feet.

$$

LSZ263-270800-
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 Tue May 26 2026

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots veering east late.
Waves building to 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves building to 1 to
3 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.SATURDAY...Northeast winds 15 to 25 knots becoming east 10 to
20 knots. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-270800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Tue May 26 2026

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds less than 10 knots veering west after
midnight, then becoming north 5 to 15 knots late. Waves calm to
2 feet.
.WEDNESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...East winds less than 10 knots veering south by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves building to 1 to
3 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. Waves subsiding to calm
to 2 feet, then building to 1 to 3 feet.
.SATURDAY...East winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.SUNDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-270800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Tue May 26 2026

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots backing northeast late.
Waves calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots becoming north 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots becoming southeast 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.SUNDAY...North winds 5 to 15 knots veering northeast. Waves calm
to 2 feet.

$$

LSZ266-270800-
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 Tue May 26 2026

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northeast late. Waves
calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots increasing to 10 to
20 knots late. Waves building to 2 to 4 feet.
.WEDNESDAY NIGHT...North winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northeast winds 5 to 15 knots backing northwest by
mid afternoon. Waves subsiding to calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots becoming north 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots becoming east 10 to
20 knots after midnight. Waves calm to 2 feet.
.SATURDAY...East winds 10 to 20 knots diminishing to 5 to
15 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.SUNDAY...North winds 5 to 15 knots veering northeast. Waves calm
to 2 feet.

$$

LSZ267-270800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Tue May 26 2026

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Waves 1 to
3 feet.
.TONIGHT...West winds 5 to 15 knots veering northeast late. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots late. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...North winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. Waves building to 2 to 4 feet,
then subsiding to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots veering northwest by mid
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots becoming east 10 to
20 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots veering southeast.
Waves calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots becoming northeast 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ261-270200-
MAFOR 2621/
Superior West 13100 12110 12120 11220. Waves 1 foot or less
tonight. Waves 1 to 3 feet building to 2 to 4 feet Wednesday.

Superior North Central 12400 11500 11800 11810 11110 12810. Waves
2 feet or less.

Superior South Central 11100 12400 11200 11100 11800 12810. Waves
2 feet or less.

Superior East 12610 11600 11800 11100 11800 11700 11720. Waves 1
to 3 feet tonight. Waves 2 feet or less Wednesday.

$$

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