174
FZUS63 KMQT 162001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EDT Thu Jul 16 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 high pressure persists over Lake Superior into Friday
while gradually shifting east towards the St. Lawrence Seaway. Low
pressure passing through the Northern Plains looks to traverse the
the lake at around 29.7 inches Friday evening into Saturday morning.
Weak ridging of 29.9 to 30.0 inches returns late Saturday and
remains through Sunday. A strong low ranging from 29.3 to 29.5
inches over northern Ontario looks to bring 29.6 inch troughing over
Lake Superior on Monday.



LSZ162-170800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EDT Thu Jul 16 2026 /300 PM CDT Thu Jul 16 2026/

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT /7 PM CDT/
FRIDAY...

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Smoke.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast 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 veering east in the
afternoon, then backing northeast late. Smoke. A chance of
showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 15 knots backing northwest
after midnight, then becoming west 10 to 20 knots late. A chance
of showers and a slight chance of thunderstorms through midnight.
Smoke. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing southwest by
mid afternoon. Areas of smoke through early afternoon. Waves calm
to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Southwest winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of showers after midnight.
Waves calm to 2 feet.
.MONDAY...Southwest 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.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-170800-
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-
400 PM EDT Thu Jul 16 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT FRIDAY...

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Smoke.
Waves calm to 2 feet.
.TONIGHT...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. Smoke. A chance of showers
and thunderstorms. Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots backing northwest late.
Smoke. A chance of showers and thunderstorms. Waves calm to
2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Areas of smoke through early 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 backing south by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. A chance of showers after
midnight. Waves building to 2 to 4 feet.
.MONDAY...Southwest winds 20 to 30 knots veering northwest. A
chance of showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-170800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EDT Thu Jul 16 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT FRIDAY...

.LATE THIS AFTERNOON...South winds less than 10 knots. Smoke.
Waves calm to 2 feet.
.TONIGHT...South winds less than 10 knots increasing to 5 to
15 knots after midnight, then backing southeast late. Smoke. A
chance of showers after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots. Smoke. Showers through
early afternoon. A chance of thunderstorms. A chance of showers
by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...East winds 5 to 15 knots backing north after
midnight. Smoke. A chance of showers and thunderstorms. Waves
calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Patchy smoke through early afternoon. Waves 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. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. A chance of showers. Waves
building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots veering northwest. A
chance of showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ265-170800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EDT Thu Jul 16 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT FRIDAY...

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Smoke. Waves
calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots becoming southeast 10 to
20 knots late. Smoke. A slight chance of showers after midnight.
Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots. Smoke. Showers and a
chance of thunderstorms. Waves building to 1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. Smoke. A chance of showers and
thunderstorms. Waves subsiding to calm to 2 feet, then building
to 2 to 4 feet.
.SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Areas of smoke through early
afternoon. Waves 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...South winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. Waves building to 2 to 4 feet.
.MONDAY...West winds 20 to 30 knots becoming northwest gales to
35 knots. A chance of showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY...Northwest gales to 40 knots diminishing to 20 to
30 knots. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 1 to 3 feet.

$$

LSZ266-170800-
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-
400 PM EDT Thu Jul 16 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT FRIDAY...

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Smoke.
Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing south after midnight,
then backing southeast late. Smoke. A slight chance of showers
after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots late. Smoke. Showers likely through early afternoon. A
chance of thunderstorms. A chance of showers by mid afternoon.
Waves building to 1 to 3 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots veering west after
midnight, then becoming northwest 15 to 25 knots late. Smoke. A
chance of showers and thunderstorms. Waves building to 2 to
4 feet.
.SATURDAY...Northwest winds 15 to 25 knots. Areas of smoke
through early afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots becoming northwest gales
to 35 knots. Showers likely. A chance of showers. Waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.TUESDAY...Northwest gales to 40 knots diminishing to 15 to
25 knots. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 2 to 4 feet.

$$

LSZ267-170800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EDT Thu Jul 16 2026

...DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT FRIDAY...

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Smoke. Waves
calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing west after
midnight, then becoming southeast less than 10 knots late. Smoke.
Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Smoke. A chance of showers through
early afternoon. Showers likely and a slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southeast winds 10 to 20 knots veering south
after midnight, then veering northwest late. Areas of smoke.
Showers through midnight. A chance of thunderstorms. A chance of
showers after midnight. Waves building to 1 to 3 feet.
.SATURDAY...Northwest winds 15 to 25 knots. Areas of smoke
through early afternoon. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 2 to 4 feet.
.MONDAY...Southwest winds 15 to 25 knots veering west. Showers
likely. A chance of thunderstorms. Waves subsiding to 1 to
3 feet, then building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 2 to 4 feet.

$$

LSZ261-170200-
MAFOR 1621/
Superior West 11100 14210 13200. A chance of showers Friday.
Waves 1 foot or less.

Superior North Central 14400 11310 12316 11310. A chance of
thunderstorms Friday morning. Waves 2 feet or less.

Superior South Central 11100 12400 12310 13326. A chance of
thunderstorms Friday. Waves 1 foot or less tonight. Waves 1 to 3
feet Friday.

Superior East 11610 11700 11600 11500 12300 12316. Waves 2 feet
or less.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes