564
FZUS63 KMQT 152001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Wed Jul 15 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...

30.1 inch ridging persists over Lake Superior through Friday while
gradually shifting east towards the St. Lawrence Seaway. Low
pressure passing through the Northern Plains looks to traverse the
Great Lakes at around 29.7 inches Friday night into Saturday,
although uncertainty remains high on track and strength. Weak 29.9
to 30.0 inch ridging returns to Lake Superior on Sunday.



LSZ162-160800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Wed Jul 15 2026 /301 PM CDT Wed Jul 15 2026/

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 11 AM EDT /10 AM CDT/
THURSDAY...

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Smoke. Waves
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest after
midnight. Smoke. Waves calm to 2 feet.
.THURSDAY...North winds less than 10 knots becoming northeast
5 to 15 knots in the afternoon, then increasing to 10 to 20 knots
late. Smoke. A slight chance of showers. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Smoke. A chance of showers and a
slight chance of thunderstorms after midnight. Waves calm to
2 feet.
.FRIDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Smoke through early afternoon. Showers
likely through early afternoon. A chance of thunderstorms. A
chance of showers by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots backing north after
midnight. A chance of thunderstorms through midnight. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.MONDAY...West winds 15 to 25 knots veering northwest. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to calm
to 2 feet.

$$

LSZ263-160800-
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 Wed Jul 15 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 11 AM EDT THURSDAY...

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Smoke. Waves
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest late.
Smoke. Waves building to 1 to 3 feet, then subsiding to calm to
2 feet.
.THURSDAY...Northwest winds less than 10 knots becoming northeast
5 to 15 knots in the afternoon. Smoke. Waves calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. Smoke. A chance of
showers and a slight chance of thunderstorms after midnight.
Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots backing northeast by mid
afternoon. Smoke through early afternoon. Showers and a chance of
thunderstorms. Waves calm to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots backing north after
midnight. Showers likely and a chance of thunderstorms through
midnight. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing southwest by
mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots increasing to 15 to
25 knots. Waves building to 1 to 3 feet.
.MONDAY...West winds 15 to 25 knots veering northwest. A chance
of showers. Waves building to 2 to 4 feet.

$$

LSZ264-160800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Wed Jul 15 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 11 AM EDT THURSDAY...

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Smoke. Waves
calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots. Smoke. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots becoming northeast less
than 10 knots in the afternoon, then veering south late. Smoke.
Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots backing southeast
after midnight. Smoke. A chance of showers after midnight. Waves
calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots. Smoke through early
afternoon. Showers. A chance of thunderstorms by mid afternoon.
Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots backing north after
midnight. Showers and a chance of thunderstorms through midnight,
then a chance of showers after midnight. Waves building to 1 to
3 feet.
.SATURDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.
.MONDAY...West winds 15 to 25 knots veering northwest. A chance
of showers. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.

$$

LSZ265-160800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Wed Jul 15 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 11 AM EDT THURSDAY...

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Smoke. Waves
calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots. Smoke. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots veering north in the
afternoon, then veering east late. Smoke. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots increasing to
10 to 20 knots late. Smoke. A chance of showers after midnight.
Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. Smoke through early afternoon. Showers
and a slight chance of thunderstorms. Waves building to 1 to
3 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots veering northwest
after midnight. Showers through midnight. A chance of
thunderstorms. A chance of showers after midnight. Waves 1 to
3 feet.
.SATURDAY...Northwest winds 15 to 25 knots. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots becoming south 10 to
20 knots. A chance of showers. Waves building to 1 to 3 feet.
.MONDAY...Northwest winds 20 to 30 knots increasing to gales to
35 knots. A chance of showers. Waves building to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ266-160800-
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 Wed Jul 15 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 11 AM EDT THURSDAY...

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Smoke. Waves
1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots. Smoke. Waves subsiding to
calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots veering north in the
afternoon, then backing northwest late. Smoke. Waves calm to
2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing southeast
after midnight. Smoke. A slight chance of showers after midnight.
Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Smoke through early afternoon. Showers
likely and a slight chance of thunderstorms. Waves building to
1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Showers and a chance of
thunderstorms. Waves 1 to 3 feet.
.SATURDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots increasing to 15 to 25 knots.
A chance of showers. Waves building to 2 to 4 feet.
.MONDAY...West winds 15 to 25 knots becoming northwest gales to
35 knots. A chance of showers. Waves building to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ267-160800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Wed Jul 15 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 11 AM EDT THURSDAY...

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Smoke. Waves
1 to 3 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight, then increasing to 10 to 20 knots late. Smoke.
Waves subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing west in the
afternoon, then increasing to 10 to 20 knots late. Smoke. Waves
calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots backing east late.
Smoke. A slight chance of showers after midnight. Waves calm to
2 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Smoke through early afternoon. A
chance of showers. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots. Showers and a
chance of thunderstorms. Waves building to 1 to 3 feet.
.SATURDAY...North winds 10 to 20 knots becoming northwest 15 to
25 knots by mid afternoon. A chance of showers through early
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots increasing to 10 to 20 knots.
Waves building to 2 to 4 feet.
.MONDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots. Showers likely. A chance of showers. Waves building to
3 to 5 feet occasionally to 7 feet.

$$

LSZ261-160200-
MAFOR 1521/
Superior West 13600 12700 11800 12100. Waves 1 foot or less.

Superior North Central 14610 11710 11700 11800 11300. Waves 2
feet or less.

Superior South Central 13610 12620 11710 11810 11800. Waves 2
feet or less.

Superior East 13620 11610 11710 13700. Waves 1 to 3 feet.

$$

WFO MQT

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