831
FZUS63 KMQT 230201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EDT Mon Jun 22 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 29.9 inch low will push eastward tonight while a 30.2 inch high
shifts into the Hudson Bay. The high then expands over the Upper
Great Lakes tomorrow. Late tomorrow into Wednesday, a weak 30.0 inch
low will pass just south of Lake Superior from the Dakotas. The low
will slowly push into the Lower Great Lakes Thursday while ridging
fills in behind associated with the high over Hudson Bay, now at
30.1 inches. Weak high pressure remains over Lake Superior through
Saturday while low pressure deepens and approaches from over the
Central Plains.



LSZ162-230800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EDT Mon Jun 22 2026 /900 PM CDT Mon Jun 22 2026/

.REST OF TONIGHT...North winds less than 10 knots. Waves calm to
2 feet.
.TUESDAY...North winds less than 10 knots becoming east 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots becoming northeast
10 to 20 knots late. A chance of rain showers through midnight. A
slight chance of thunderstorms. Rain showers likely after
midnight. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots. Showers likely
through early afternoon, then a slight chance of showers and
thunderstorms by mid afternoon. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots becoming north
5 to 15 knots after midnight. A slight chance of rain showers.
Waves subsiding to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds less than 10 knots. Waves calm to
2 feet.
.FRIDAY...North winds 5 to 15 knots veering northeast. Waves calm
to 2 feet.
.SATURDAY...Northeast winds 10 to 20 knots veering east. A chance
of rain showers. Waves building to 1 to 3 feet.

$$

LSZ263-230800-
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 22 2026

.REST OF TONIGHT...West winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Southwest winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing east late. Waves calm to
2 feet.
.TUESDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers through midnight, then rain showers likely and a slight
chance of thunderstorms after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 10 to 20 knots backing northeast by mid
afternoon. Showers likely through early afternoon. A slight
chance of thunderstorms. A slight chance of showers by mid
afternoon. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 knots becoming north
5 to 15 knots after midnight. A slight chance of rain showers.
Waves subsiding to calm to 2 feet.
.THURSDAY...North winds less than 10 knots backing northwest by
mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...West winds less than 10 knots. Waves calm to
2 feet.
.FRIDAY...Northeast winds 5 to 15 knots veering east. Waves calm
to 2 feet.
.SATURDAY...East winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ264-230800-
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 22 2026

.REST OF TONIGHT...West winds 5 to 15 knots veering northwest
after midnight, then backing west late. Waves calm to 2 feet.
.TUESDAY...West winds less than 10 knots backing southwest late.
Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots. A chance of rain
showers after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. A chance of rain showers
and a slight chance of thunderstorms. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots backing northeast
after midnight. A slight chance of rain showers through midnight.
Waves calm to 2 feet.
.THURSDAY...North winds less than 10 knots becoming northwest
5 to 15 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. Waves calm to 2 feet.
.FRIDAY...Northwest winds less than 10 knots veering east. Waves
calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ265-230800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EDT Mon Jun 22 2026

.REST OF TONIGHT...Northwest winds 10 to 20 knots becoming west
5 to 15 knots late. Waves calm to 2 feet.
.TUESDAY...West winds 5 to 15 knots backing east in the
afternoon, then veering southeast late. Waves calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots increasing to
10 to 20 knots late. A chance of showers after midnight. Waves
calm to 2 feet.
.WEDNESDAY...Southeast winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. Showers through early afternoon. A
slight chance of thunderstorms. A chance of showers by mid
afternoon. Waves building to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots becoming north 5 to
15 knots after midnight. A chance of showers. Waves subsiding to
calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...Northwest winds 5 to 15 knots veering east. Waves calm
to 2 feet.
.SATURDAY...East winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ266-230800-
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 22 2026

.REST OF TONIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots late. Waves calm to 2 feet.
.TUESDAY...Northwest winds 5 to 15 knots backing west late. Waves
calm to 2 feet.
.TUESDAY NIGHT...Southeast winds 5 to 15 knots. A chance of rain
showers after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots backing east by mid
afternoon. A chance of rain showers. A slight chance of
thunderstorms by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A slight chance of rain showers. Waves
calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...East winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ267-230800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EDT Mon Jun 22 2026

.REST OF TONIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight, then backing southeast late. A slight chance of rain
showers after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots. A chance of rain showers.
A slight chance of thunderstorms by mid afternoon. Waves calm to
2 feet.
.WEDNESDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of rain showers. Waves calm to
2 feet.
.THURSDAY...East winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.FRIDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots veering east. Waves calm to
2 feet.

$$

LSZ261-230800-
MAFOR 2303/
Superior West 13700 11800 11300 12200 11210. Waves 1 foot or
less.

Superior North Central 11710 13700 11600 12500 11300. Waves 1
foot or less.

Superior South Central 13710 11700 11800 11200 12300. Waves 2
feet or less.

Superior East 12710 13700 12600 11700. Waves 1 to 3 feet
overnight and Tuesday. Waves 1 foot or less Tuesday evening.

$$

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