684
FZUS63 KMQT 300201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EDT Mon Jun 29 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...

Tonight, a 29.4 inch low will rotate around Lake Winnipeg, deepening
to 29.1 inches by Tuesday morning.  This low wobbles around southern
Manitoba thorugh Tuesday, weakening to 29.5 inches as it crosses
northern Ontario Wednesday. Thursday morning, the low will further
weaken to 29.6 inches over northern Quebec while 30.0 inch high
pressure builds over the US Southeast and northern Manitoba and
broad 29.8 inch low pressure spreads over the High Plains. Friday
into the weekend, the high over Canada moves into Hudson Bay,
building to 30.1 inches.



LSZ162-300800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Mon Jun 29 2026 /900 PM CDT Mon Jun 29 2026/

.REST OF TONIGHT...Northeast winds 10 to 20 knots veering east
after midnight, then becoming south 5 to 15 knots late. Patchy
fog. Showers likely by midnight. A chance of thunderstorms. A
chance of showers after midnight. Waves 2 to 4 feet subsiding to
1 to 3 feet.
.TUESDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots late. Patchy fog through early afternoon. Waves
subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots. Waves calm to
2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A chance of showers
and thunderstorms by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 15 knots. A chance of
showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.THURSDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots backing northeast
after midnight. A chance of showers. Waves calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.

$$

LSZ263-300800-
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-
1000 PM EDT Mon Jun 29 2026

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

.REST OF TONIGHT...Southeast winds 10 to 20 knots veering south
late. Patchy dense fog. A chance of showers and thunderstorms.
Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TUESDAY...Southwest winds 5 to 15 knots backing south late.
Patchy fog. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A slight chance of showers and
thunderstorms through midnight. Some thunderstorms may be severe.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A chance of showers
and thunderstorms by mid afternoon. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Showers likely through midnight. A
chance of thunderstorms. A slight chance of showers after
midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing west. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots veering east. A chance
of showers. Waves calm to 2 feet.

$$

LSZ264-300800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EDT Mon Jun 29 2026

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

.REST OF TONIGHT...Southeast winds 10 to 20 knots veering south
late. Patchy dense fog. A chance of showers and thunderstorms.
Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to
4 feet.
.TUESDAY...South winds 5 to 15 knots. Patchy fog. A slight chance
of showers and thunderstorms by mid afternoon. Waves subsiding to
calm to 2 feet, then building to 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A slight chance of showers and
thunderstorms through midnight. Waves 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots backing south by mid
afternoon. A chance of showers and a slight chance of
thunderstorms by mid afternoon. Waves 1 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. A chance of showers and
thunderstorms. Waves subsiding to calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight. Waves calm to 2 feet.
.FRIDAY...East winds less than 10 knots veering west. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots veering east. A chance
of showers. Waves calm to 2 feet.

$$

LSZ265-300800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EDT Mon Jun 29 2026

.REST OF TONIGHT...Southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then veering south late. Patchy
fog. A chance of showers and a slight chance of thunderstorms.
Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots backing southeast late.
Patchy fog through early afternoon. A slight chance of showers
and thunderstorms. Some thunderstorms may be severe by mid
afternoon. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of thunderstorms and a slight chance of
showers through midnight. Some thunderstorms may be severe. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots backing southeast by
mid afternoon. A chance of showers and thunderstorms by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 knots. Showers likely
and a chance of thunderstorms through midnight, then a chance of
showers after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots veering west. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots veering east. A chance
of showers. Waves calm to 2 feet.

$$

LSZ266-300800-
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-
1000 PM EDT Mon Jun 29 2026

.REST OF TONIGHT...Southeast winds 15 to 25 knots veering south
after midnight. Patchy fog. A chance of showers and a slight
chance of thunderstorms. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet.
.TUESDAY...South winds 10 to 20 knots. Patchy fog. A slight
chance of showers and thunderstorms. Some thunderstorms may be
severe by mid afternoon. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. A chance of showers and thunderstorms through midnight.
Some thunderstorms may be severe. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots backing southeast by
mid afternoon. A chance of showers and a slight chance of
thunderstorms by mid afternoon. Waves building to 1 to 3 feet,
then subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Showers likely through midnight. A chance of
thunderstorms. A chance of showers after midnight. Waves calm to
2 feet.
.THURSDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...East winds 5 to 15 knots backing northwest. A chance of
showers. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots veering east. A chance of
showers. Waves calm to 2 feet.

$$

LSZ267-300800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EDT Mon Jun 29 2026

.REST OF TONIGHT...Southeast winds 15 to 25 knots veering south
late. A slight chance of showers and thunderstorms. Patchy fog
after midnight. Waves 2 to 4 feet.
.TUESDAY...South winds 10 to 20 knots. Patchy fog. A chance of
showers and a slight chance of thunderstorms. Some thunderstorms
may be severe by mid afternoon. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots late. A chance of thunderstorms through midnight. A
chance of showers. A slight chance of thunderstorms after
midnight. Some thunderstorms may be severe through midnight.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 5 to 15 knots backing southeast by
mid afternoon. A chance of showers and a slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Showers likely and a chance of thunderstorms.
Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...Northeast winds 5 to 15 knots backing west. A chance of
showers and thunderstorms. Waves calm to 2 feet.
.SATURDAY...Northwest winds 5 to 15 knots veering northeast.
Waves calm to 2 feet.

$$

LSZ261-300800-
MAFOR 3003/
Superior West 11226 19224 11326 11410 19414 12510 11500 11510
11520. A chance of thunderstorms overnight. Waves 2 to 4 feet
overnight. Waves 1 to 3 feet Tuesday and Tuesday evening.

Superior North Central 11330 19334 11326 19324 11420 19424 11420
11510 12410 11420. A chance of thunderstorms overnight. Waves 3
to 5 feet overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet
Tuesday. Waves 1 to 3 feet Tuesday evening.

Superior South Central 11320 12430 11420 11410 11310 12320. A
chance of showers overnight and Tuesday morning. A chance of
showers and thunderstorms Tuesday evening. Waves 2 to 4 feet
overnight. Waves 1 to 3 feet Tuesday and Tuesday evening.

Superior East 11320 12420 11424 12410 11420 11210. A chance of
showers overnight and Tuesday morning. A chance of showers and
thunderstorms Tuesday evening. Waves 2 to 4 feet overnight. Waves
2 to 4 feet subsiding to 1 to 3 feet Tuesday. Waves 2 to 3 feet
Tuesday evening.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes