361
FZUS63 KMQT 270801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EDT Wed May 27 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...

Ridging of 30.2 inches persists over Lake Superior from a 30.4 inch
high over Hudson Bay. This parent high shifts southward over the
lake at 30.3 inches on Thursday. The high weakens to around 30.1
inches on Friday as it continues its southerly propagation towards
Lower Michigan. 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 propagates south.
High pressure persists over Lake Superior through early next week.


LSZ162-272000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Wed May 27 2026 /301 AM CDT Wed May 27 2026/

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 10 to 20 knots becoming east 15 to
25 knots in the afternoon, then backing northeast late. Waves
building to 2 to 4 feet.
.TONIGHT...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 veering east late.
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.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots increasing to 15 to
25 knots after midnight. Waves subsiding to calm to 2 feet, then
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.

$$

LSZ263-272000-
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 Wed May 27 2026

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then veering east late. Waves building
to 2 to 4 feet.
.TONIGHT...East winds 10 to 20 knots becoming northeast 5 to
15 knots after midnight, then diminishing to less than 10 knots
late. Waves subsiding to calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots backing northeast in the
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 5 to 15 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 2 to 4 feet.
.SATURDAY...East winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing northeast. Waves calm
to 2 feet.

$$

LSZ264-272000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EDT Wed May 27 2026

.EARLY THIS MORNING...Northeast winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northeast winds 5 to 15 knots backing north in the
afternoon. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots diminishing to less than
10 knots late. Waves calm to 2 feet.
.THURSDAY...East winds less than 10 knots veering south late.
Waves 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 south 5 to 15 knots
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. Waves building to 1 to
3 feet.
.SATURDAY...East winds 5 to 15 knots. Waves subsiding to calm to
2 feet.
.SUNDAY...West winds 5 to 15 knots veering northeast. Waves calm
to 2 feet.

$$

LSZ265-272000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EDT Wed May 27 2026

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Northeast winds 5 to 15 knots becoming north 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...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...North winds 5 to 15 knots veering east in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots veering north by mid
afternoon. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots. Waves building to 1 to
3 feet.
.SATURDAY...East winds 10 to 20 knots becoming south 5 to
15 knots. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering north. Waves calm to
2 feet.

$$

LSZ266-272000-
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 Wed May 27 2026

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves building to 2 to 4 feet.
.TONIGHT...North winds 10 to 20 knots becoming northeast 5 to
15 knots after midnight, then backing north late. Waves subsiding
to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then backing northwest late. Waves
calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots becoming west 10 to
20 knots after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots becoming north 5 to 15 knots
by mid afternoon. Waves building to 1 to 3 feet, then subsiding
to calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots becoming east 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.SATURDAY...East winds 10 to 20 knots becoming south 5 to
15 knots. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.
.SUNDAY...West winds 5 to 15 knots veering northeast. Waves calm
to 2 feet.

$$

LSZ267-272000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EDT Wed May 27 2026

.EARLY THIS MORNING...North winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TODAY...North winds 5 to 15 knots backing northwest in the
afternoon, then increasing to 15 to 25 knots late. Patchy fog
through early afternoon. Waves building to 2 to 4 feet.
.TONIGHT...North winds 15 to 25 knots becoming northeast 10 to
20 knots after midnight, then backing north late. Waves subsiding
to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering west
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 building to 1 to 3 feet.
.SATURDAY...East winds 10 to 20 knots becoming south 5 to
15 knots. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots becoming north 10 to 20 knots.
Waves calm to 2 feet.

$$

LSZ261-271400-
MAFOR 2709/
Superior West 11110 11120 11130 11230 11220 11120 11110 11100.
Waves 1 foot or less building to 2 to 4 feet today. Waves 1 to 3
feet tonight.

Superior North Central 11800 11110 13810 12110 11100. Waves 2
feet or less.

Superior South Central 12800 12810 13820 11110. Waves 2 feet or
less today. Waves 1 to 3 feet tonight.

Superior East 13800 11720 11830 11820 11120 11110. Waves 1 foot
or less building to 1 to 3 feet today. Waves 2 to 4 feet
subsiding to 1 to 3 feet tonight.

$$

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