546
FZUS63 KMQT 272001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Mon Jul 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...

Weak ridging of near 30.0 inches returns to Lake Superior tonight
into Tuesday and remains until Thursday morning. The ridging then
gives way to weak troughing of 29.9 inches before becoming weak
ridging of 29.9 to 30.0 inches again the rest of this week.



LSZ162-280800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Mon Jul 27 2026 /301 PM CDT Mon Jul 27 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT /7 AM CDT/
TUESDAY...

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Patchy fog.
Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots diminishing to less than
10 knots after midnight. Patchy fog. Waves calm to 2 feet.
.TUESDAY...West winds less than 10 knots becoming south 5 to
15 knots in the afternoon, then backing east late. Patchy fog.
Waves calm to 2 feet.
.TUESDAY NIGHT...East winds less than 10 knots backing northeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...North winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots backing west after
midnight. A chance of showers and thunderstorms. Waves calm to
2 feet.
.FRIDAY...Southwest winds 5 to 15 knots veering northwest. A
chance of showers. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots veering northeast. Waves
calm to 2 feet.

$$

LSZ263-280800-
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 Mon Jul 27 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY...

.LATE THIS AFTERNOON...Northeast winds 10 to 20 knots. Patchy
fog. Waves 1 to 3 feet subsiding to calm to 2 feet.
.TONIGHT...North winds 5 to 15 knots backing northwest after
midnight, then becoming north less than 10 knots late. Patchy
fog. Waves calm to 2 feet.
.TUESDAY...West winds less than 10 knots becoming south 5 to
15 knots in the afternoon, then veering southwest late. Patchy
fog. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots becoming southeast less
than 10 knots after midnight, then veering south late. Waves calm
to 2 feet.
.WEDNESDAY...South winds less than 10 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots becoming south less
than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...South winds less than 10 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots becoming west
less than 10 knots after midnight. A chance of showers and
thunderstorms. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots veering northwest. Waves
calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-280800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Mon Jul 27 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY...

.LATE THIS AFTERNOON...North winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Patchy fog. Waves calm to 2 feet.
.TUESDAY...North winds less than 10 knots backing west in the
afternoon, then backing southwest late. Patchy dense fog. Waves
calm to 2 feet.
.TUESDAY NIGHT...Southwest winds less than 10 knots backing south
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds less than 10 knots. Waves calm to
2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.FRIDAY...South winds less than 10 knots. Waves calm to 2 feet.
.SATURDAY...North winds less than 10 knots increasing to 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ265-280800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Mon Jul 27 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY...

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Patchy dense
fog. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north after
midnight, then diminishing to 5 to 15 knots late. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots veering southeast. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ266-280800-
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 Mon Jul 27 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY...

.LATE THIS AFTERNOON...North winds 10 to 20 knots. Patchy dense
fog. Waves calm to 2 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots. Patchy fog through midnight. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TUESDAY...North winds 5 to 15 knots backing northwest in the
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight, then veering south late. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Southeast 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 5 to 15 knots backing south. Waves calm
to 2 feet.
.SATURDAY...North winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ267-280800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Mon Jul 27 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT TUESDAY...

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Patchy
fog. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 15 to
25 knots after midnight. Patchy fog. Waves building to 2 to
4 feet.
.TUESDAY...North winds 15 to 25 knots backing northwest in the
afternoon. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...South winds 5 to 15 knots backing northeast. Waves calm
to 2 feet.
.SATURDAY...North winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ261-280200-
MAFOR 2721/
Superior West 11110 19114 11800 13700 11600 11504 11404. Waves 1
to 3 feet subsiding to 1 foot or less tonight. Waves 1 foot or
less Tuesday.

Superior North Central 11800 11710 11810 13800 11700 11600. Waves
1 foot or less.

Superior South Central 11810 19814 11720 12820 14810. Waves 1 to
3 feet.

Superior East 11710 19714 14820 11820 11810 11720. Waves 1 to 3
feet.

$$

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