122
FZUS63 KMQT 271401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 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 today due to a
30.3 inch high centered over Hudson Bay. On Thursday, this parent
high shifts southward over the lake at 30.3 inches. The high center
weakens to around 30.1 inches on Friday as it continues its
southerly propagation towards Lower Michigan, causing pressure to
decrease to 29.9 inches over Lake Superior. Following this, a second
ridge pushing in from Hudson Bay brings 30.1 inch ridging back over
the lake late on Friday. Pressure subsequently increases to 30.3
inches by Saturday midday as this second 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-
1001 AM EDT Wed May 27 2026 /901 AM CDT Wed May 27 2026/

.REST OF TODAY...Northeast winds 10 to 20 knots becoming east
15 to 25 knots in the afternoon, then backing northeast late.
Waves 1 to 3 feet 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-
1001 AM EDT Wed May 27 2026

.REST OF TODAY...Northeast winds 10 to 20 knots increasing to
15 to 25 knots in the afternoon, then veering east late. Waves
1 to 3 feet 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. A slight chance of rain
showers by mid afternoon. 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-
1001 AM EDT Wed May 27 2026

.REST OF 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. A slight chance of showers 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-
1001 AM EDT Wed May 27 2026

.REST OF TODAY...North winds 10 to 20 knots. 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-
1001 AM EDT Wed May 27 2026

.REST OF TODAY...North winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet 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-
1001 AM EDT Wed May 27 2026

.REST OF TODAY...North winds 5 to 15 knots becoming northwest
10 to 20 knots in the afternoon, then increasing to 15 to
25 knots late. Waves calm to 2 feet 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.

$$

LSZ261-272000-
MAFOR 2715/
Superior West 11130 11230 11220 11120 11110 13100. Waves 2 to 4
feet this afternoon. Waves 1 to 3 feet tonight and Thursday
morning.

Superior North Central 13810 12110 13100. Waves 2 feet or less.

Superior South Central 12810 13820 11110 12800. Waves 2 feet or
less this afternoon. Waves 1 to 3 feet tonight and Thursday
morning.

Superior East 11800 11720 11830 11820 11120 11110 11810 11800.
Waves 1 foot or less building to 1 to 3 feet this afternoon.
Waves 2 to 4 feet subsiding to 1 to 3 feet tonight. Waves 1 to 2
feet Thursday morning.

$$

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