485
FZUS63 KMQT 161401
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 AM EDT Tue Jun 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...

A 29.5 inch low over northeast Wisconsin and the U.P. slowly moves
east-northeast into Ontario this afternoon into early Wednesday
morning. A low of 29.2 inches over the Northern Plains on Wednesday
morning moves through Lower Michigan Wednesday night before arriving
into southern Ontario early Thursday morning. A 29.9 inch high then
develops over the Plains Thursday and Thursday night, strengthening
to 30.0 inches by Friday before diving into the Mid-Mississippi
Valley late in the day; this brings 29.9 inch ridging over Lake
Superior by Friday. The ridging strengthens slightly to around 30.0
inches over Lake Superior by Saturday as the parent high meanders
into the Ohio River Valley and a second high pressure over northern
Canada heads towards Hudson Bay. The second high keeps 30.0 inch
ridging over Lake Superior into Sunday as it finally arrives over
western Hudson Bay.



LSZ162-162000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 AM EDT Tue Jun 16 2026 /901 AM CDT Tue Jun 16 2026/

.REST OF TODAY...Northeast winds 5 to 15 knots veering south
late. A slight chance of showers by late morning. Waves calm to
2 feet.
.TONIGHT...South winds 5 to 15 knots becoming north less than
10 knots after midnight, then veering south late. A slight chance
of rain showers after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots increasing to 15 to
25 knots in the afternoon, then backing northeast late. A chance
of rain showers. Waves building to 2 to 4 feet.
.WEDNESDAY NIGHT...Northeast winds 15 to 25 knots becoming west
10 to 20 knots after midnight. A chance of rain showers. Waves
subsiding to calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots. A slight chance of showers
and thunderstorms by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. Waves calm to 2 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots veering northeast. Waves
calm to 2 feet.

$$

LSZ263-162000-
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 Tue Jun 16 2026

.REST OF TODAY...Northeast winds 5 to 15 knots veering southwest
late. A slight chance of showers by late morning. Waves calm to
2 feet.
.TONIGHT...Southwest winds 5 to 15 knots becoming south less than
10 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east in the
afternoon, then increasing to 10 to 20 knots late. A chance of
rain showers. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots backing north
after midnight. A chance of rain showers. Waves subsiding to calm
to 2 feet.
.THURSDAY...West winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. A slight chance of showers by mid afternoon.
Waves building to 1 to 3 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots veering northwest
after midnight. Waves 1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.SATURDAY...West winds 5 to 15 knots veering north. Waves calm to
2 feet.

$$

LSZ264-162000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 AM EDT Tue Jun 16 2026

.REST OF TODAY...Northeast winds 5 to 15 knots backing north
late. A slight chance of rain showers by late morning. Waves calm
to 2 feet.
.TONIGHT...West winds less than 10 knots backing southwest after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds less than 10 knots increasing to
5 to 15 knots in the afternoon, then backing east late. A slight
chance of rain showers by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots backing north after
midnight. A slight chance of rain showers. Waves calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots backing west by mid
afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots veering northwest
after midnight. Waves 1 to 3 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-162000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 AM EDT Tue Jun 16 2026

.REST OF TODAY...Northeast winds 5 to 15 knots backing north
late. A slight chance of showers. A slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing southwest late. Waves
calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. A slight chance of showers by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. Showers likely through midnight,
then a chance of showers after midnight. Waves building to 1 to
3 feet.
.THURSDAY...Northwest winds 15 to 25 knots becoming west 20 to
30 knots by mid afternoon. A slight chance of showers through
early afternoon. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots. Waves 2 to 4 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ266-162000-
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 Tue Jun 16 2026

.REST OF TODAY...Northeast winds 5 to 15 knots backing north
late. A slight chance of showers. A slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing west late. A
slight chance of rain showers through midnight. Waves calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing east late. A
slight chance of rain showers by mid afternoon. Waves calm to
2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots backing north after
midnight. Rain showers likely through midnight, then a chance of
rain showers after midnight. Waves building to 2 to 4 feet.
.THURSDAY...Northwest winds 20 to 30 knots. A slight chance of
showers through early afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY NIGHT...Northwest winds 20 to 30 knots. Waves 3 to
5 feet occasionally to 7 feet.
.FRIDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet.
.SATURDAY...West winds 5 to 15 knots. Waves subsiding to calm to
2 feet.

$$

LSZ267-162000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 AM EDT Tue Jun 16 2026

.REST OF TODAY...East winds 5 to 15 knots backing north late. A
slight chance of showers and thunderstorms by mid afternoon.
Waves calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots. A slight chance of rain
showers. Waves calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing east in the
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots becoming north 10 to
20 knots after midnight. Rain showers likely. Waves building to
1 to 3 feet.
.THURSDAY...Northwest winds 15 to 25 knots becoming west 20 to
30 knots by mid afternoon. A slight chance of showers through
early afternoon. Waves building to 3 to 6 feet occasionally to
8 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots backing west
after midnight. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.FRIDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ261-162000-
MAFOR 1615/
Superior West 11110 11200 11400 11500 13400 11300. Waves 2 feet
or less.

Superior North Central 11100 11800 11700 12600 12500 11300. Waves
1 foot or less.

Superior South Central 11100 12800 12700 11600 11500 11300. Waves
1 foot or less.

Superior East 11200 11100 11800 14700 11600. A chance of rain
showers this evening. Waves 1 foot or less.

$$

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