177
FZUS63 KMQT 262001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Sun Apr 26 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 remains over the lake tonight. Throughout
Monday, this low moves northeast and maintains strength, arriving in
Wisconsin tomorrow night. The low then crosses Lake Superior Tuesday
morning, reaching James Bay Tuesday night. In the wake of the low,
30.2 inch high pressure builds over the Canadian Prairie, sending
30.1 inch high pressure over the lake Wednesday. This high
approaches the Great Lakes slowly Thursday, residing over the lake
Friday at 30.2 inches.


LSZ162-270800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Sun Apr 26 2026 /301 PM CDT Sun Apr 26 2026/

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. A slight
chance of rain showers. Waves calm to 2 feet.
.TONIGHT...Northeast winds 10 to 20 knots veering east late. A
slight chance of rain showers. Patchy fog after midnight. Waves
building to 3 to 6 feet occasionally to 8 feet.
.MONDAY...East winds 15 to 25 knots backing northeast in the
afternoon. Patchy fog through early afternoon. Rain showers. A
slight chance of thunderstorms by mid afternoon. Waves 3 to
6 feet occasionally to 8 feet.
.MONDAY NIGHT...Northeast winds 15 to 25 knots backing northwest
after midnight, then increasing to 20 to 30 knots late. Rain
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. A slight chance of rain showers
through early afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming southwest 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots diminishing to less than
10 knots. Waves calm to 2 feet.

$$

LSZ263-270800-
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 Sun Apr 26 2026

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots becoming east 10 to
20 knots after midnight. Patchy fog through midnight, then areas
of dense fog after midnight. A slight chance of rain showers
after midnight. Waves building to 2 to 4 feet.
.MONDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Patchy fog through early afternoon. A chance of
rain showers through early afternoon, then rain showers and a
slight chance of thunderstorms by mid afternoon. Waves building
to 5 to 8 feet occasionally to 10 feet.
.MONDAY NIGHT...East winds 15 to 25 knots backing north after
midnight, then becoming northwest 20 to 30 knots late. A slight
chance of thunderstorms through midnight. Rain showers. Waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...West winds 20 to 30 knots. A chance of rain showers
through early afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing west. Waves calm to
2 feet.

$$

LSZ264-270800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Sun Apr 26 2026

.LATE THIS AFTERNOON...Northeast winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering east after
midnight. Areas of dense fog. Waves building to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots late. Patchy dense fog through early afternoon. A chance
of rain showers. A slight chance of thunderstorms by mid
afternoon. Waves building to 6 to 9 feet occasionally to 11 feet.
.MONDAY NIGHT...Southeast winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots after
midnight, then becoming west 15 to 25 knots late. A slight chance
of thunderstorms through midnight. Rain showers. Waves building
to 9 to 12 feet occasionally to 15 feet, then subsiding to 7 to
10 feet occasionally to 13 feet.
.TUESDAY...West gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. A chance of rain showers through early
afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...West winds less than 10 knots veering
northwest after midnight. Waves calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing west. Waves calm to
2 feet.

$$

LSZ265-270800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Sun Apr 26 2026

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH TUESDAY
AFTERNOON...

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast late.
Patchy fog through midnight, then areas of dense fog after
midnight. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots increasing to gales to
35 knots. Patchy fog through early afternoon. A chance of rain
showers. A slight chance of thunderstorms by mid afternoon. Waves
building to 5 to 8 feet occasionally to 10 feet.
.MONDAY NIGHT...Southeast winds 20 to 30 knots diminishing to
15 to 25 knots after midnight, then becoming southwest 20 to
30 knots late. Rain showers and a slight chance of thunderstorms.
Waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...West gales to 35 knots. A chance of rain showers
through early afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest. Waves
calm to 2 feet.
.FRIDAY...North winds 5 to 15 knots backing northwest. Waves calm
to 2 feet.

$$

LSZ266-270800-
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 Sun Apr 26 2026

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH TUESDAY
AFTERNOON...

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast late.
Patchy fog through midnight. Areas of dense fog after midnight.
Waves building to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots increasing to gales to
40 knots. A chance of rain showers by mid afternoon. Waves
building to 8 to 11 feet occasionally to 14 feet.
.MONDAY NIGHT...Southeast gales to 40 knots becoming south gales
to 35 knots late. Rain showers and a chance of thunderstorms.
Waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 7 to 10 feet occasionally to 13 feet.
.TUESDAY...West gales to 40 knots. A chance of rain showers.
Waves subsiding to 6 to 9 feet occasionally to 11 feet, then
building to 10 to 14 feet occasionally to 18 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
.FRIDAY...North winds 10 to 20 knots backing northwest. Waves
calm to 2 feet.

$$

LSZ267-270800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Sun Apr 26 2026

...GALE WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH TUESDAY
AFTERNOON...

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...East winds 10 to 20 knots veering southeast after
midnight. Patchy fog through midnight. Waves building to 1 to
3 feet.
.MONDAY...Southeast winds 15 to 25 knots increasing to gales to
40 knots in the afternoon. A slight chance of rain showers by mid
afternoon. Waves building to 7 to 10 feet occasionally to
13 feet.
.MONDAY NIGHT...Southeast gales to 40 knots. Rain showers and a
slight chance of thunderstorms. Waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet.
.TUESDAY...West gales to 35 knots. Rain showers likely through
early afternoon, then a slight chance of rain showers by mid
afternoon. Waves subsiding to 5 to 8 feet occasionally to
10 feet, then building to 10 to 14 feet occasionally to 18 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots becoming north 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.FRIDAY...Northwest winds 10 to 20 knots veering north. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ261-270200-
MAFOR 2621/
Superior West 12110 11120 19124 11124 12230 12236. Waves 1 to 3
feet building to 3 to 5 feet tonight. Waves 3 to 6 feet Monday.

Superior North Central 11300 11104 12214 11224 12330 11340. A
chance of rain showers Monday afternoon. Waves 1 to 2 feet
tonight. Waves 2 to 4 feet building to 4 to 7 feet Monday.

Superior South Central 11210 12310 11314 11320 12330 11340. A
chance of rain showers Monday afternoon. Waves 1 to 2 feet
tonight. Waves 2 to 4 feet building to 4 to 7 feet Monday.

Superior East 11200 11210 12310 11320 11330 11340 11350. Waves 1
to 2 feet tonight. Waves 2 to 3 feet building to 5 to 8 feet
Monday.

$$

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