888
FZUS63 KMQT 150201
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EDT Thu May 14 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 ridging over Lake Superior will be pressed southeast
tonight into Friday as a 29.1 inch low moves from the Canadian
Prairies to northern Ontario. This low is expected to bring
troughing of 29.6 inches over Lake Superior late Friday into
Saturday as it tracks to near James Bay at 29.2 inches by Saturday
morning. Ridging of 30.1 inches builds over the lake from northern
Ontario Saturday night into Sunday. This is followed by another 29.7
inch trough extending northeast toward the Upper Great Lakes from
the central Plains by Monday midday, which lingers over the area
through Tuesday.


LSZ162-150800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EDT Thu May 14 2026 /901 PM CDT Thu May 14 2026/

.REST OF TONIGHT...South winds 15 to 25 knots. Showers likely by
midnight, then a chance of showers after midnight. Waves 3 to
6 feet occasionally to 8 feet.
.FRIDAY...Southwest winds 15 to 25 knots. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then veering west late. Waves
subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.SUNDAY...Northeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. Rain showers likely by mid afternoon.
Waves building to 8 to 11 feet occasionally to 14 feet.
.SUNDAY NIGHT...Northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. Rain showers and a chance of
thunderstorms. Waves subsiding to 4 to 7 feet occasionally to
9 feet.
.MONDAY...South winds 10 to 20 knots becoming northeast 20 to
30 knots. Rain showers and a chance of thunderstorms. Waves
subsiding to 1 to 3 feet, then building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY...West gales to 35 knots diminishing to 20 to 30 knots.
A chance of rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 2 to 4 feet.

$$

LSZ263-150800-
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 PM EDT Thu May 14 2026

.REST OF TONIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of rain showers by midnight.
Rain showers likely after midnight. Waves 3 to 5 feet
occasionally to 7 feet building to 4 to 7 feet occasionally to
9 feet.
.FRIDAY...South winds 20 to 30 knots veering southwest in the
afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.SATURDAY...West winds 10 to 20 knots backing southwest by mid
afternoon. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots veering east
after midnight. Waves subsiding to calm to 2 feet, then building
to 1 to 3 feet.
.SUNDAY...Northeast winds 15 to 25 knots becoming east 20 to
30 knots by mid afternoon. A chance of rain showers by mid
afternoon. Waves building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY NIGHT...East winds 20 to 30 knots. Rain showers and a
chance of thunderstorms. Waves subsiding to 4 to 7 feet
occasionally to 9 feet.
.MONDAY...South winds 10 to 20 knots becoming northeast gales to
35 knots. Rain showers. Waves subsiding to 2 to 4 feet, then
building to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...West gales to 40 knots. A chance of rain showers.
Waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet.

$$

LSZ264-150800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EDT Thu May 14 2026

.REST OF TONIGHT...Southeast winds 15 to 25 knots veering south
after midnight. A slight chance of rain showers by midnight, then
rain showers after midnight. Waves 3 to 6 feet occasionally to
8 feet.
.FRIDAY...South winds 15 to 25 knots veering southwest in the
afternoon. A chance of showers through early afternoon. Waves
building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.SATURDAY...West winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots. Waves subsiding
to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. A chance of rain showers by mid afternoon.
Waves building to 2 to 4 feet.
.SUNDAY NIGHT...East winds 20 to 30 knots becoming southeast
gales to 35 knots after midnight. Rain showers and a chance of
thunderstorms. Waves building to 5 to 8 feet occasionally to
10 feet.
.MONDAY...South winds 15 to 25 knots becoming northeast 20 to
30 knots. Rain showers and a chance of thunderstorms. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
5 to 8 feet occasionally to 10 feet.
.TUESDAY...West gales to 40 knots. A chance of rain showers.
Waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet.

$$

LSZ265-150800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EDT Thu May 14 2026

.REST OF TONIGHT...South winds 20 to 30 knots. Showers likely
after midnight. Waves 3 to 5 feet occasionally to 7 feet.
.FRIDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then veering southwest late. A chance
of showers through early afternoon. Waves subsiding to 1 to
3 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots. Waves 1 to
3 feet.
.SATURDAY...West winds 15 to 25 knots. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. A chance of rain showers by mid afternoon.
Waves building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...East gales to 35 knots veering southeast after
midnight. Rain showers and a chance of thunderstorms. Waves
building to 5 to 8 feet occasionally to 10 feet.
.MONDAY...South winds 15 to 25 knots becoming southwest 20 to
30 knots. A chance of showers. A chance of thunderstorms.
Showers. Waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet.
.TUESDAY...West gales to 40 knots. Rain showers likely. Waves
building to 7 to 10 feet occasionally to 13 feet.

$$

LSZ266-150800-
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 PM EDT Thu May 14 2026

.REST OF TONIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of rain showers after midnight.
Waves 3 to 5 feet occasionally to 7 feet building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...South winds 20 to 30 knots. Rain showers likely through
early afternoon. Waves building to 4 to 8 feet occasionally to
10 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots veering southwest
after midnight, then diminishing to 15 to 25 knots late. A slight
chance of showers through midnight. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.SUNDAY NIGHT...East gales to 35 knots veering southeast after
midnight. Rain showers and a chance of thunderstorms. Waves
building to 5 to 8 feet occasionally to 10 feet.
.MONDAY...South winds 20 to 30 knots increasing to gales to
35 knots. Rain showers and a chance of thunderstorms. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
4 to 7 feet occasionally to 9 feet.
.TUESDAY...West gales to 45 knots. Rain showers likely, then a
chance of rain showers. Waves building to 6 to 10 feet
occasionally to 13 feet.

$$

LSZ267-150800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EDT Thu May 14 2026

.REST OF TONIGHT...Southeast winds 10 to 20 knots veering south
after midnight, then increasing to 15 to 25 knots late. Waves
calm to 2 feet building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...South winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. A chance of rain showers through early
afternoon. Waves building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots becoming southwest
15 to 25 knots late. A slight chance of showers. Waves subsiding
to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots veering northeast
after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...East winds 20 to 30 knots becoming southeast
gales to 35 knots after midnight. Rain showers likely. Waves
building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...South winds 20 to 30 knots. Showers and a chance of
thunderstorms. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.TUESDAY...West gales to 35 knots. Rain showers likely, then a
chance of rain showers. Waves building to 6 to 9 feet
occasionally to 11 feet.

$$

LSZ261-150800-
MAFOR 1503/
Superior West 11436 12430 14530 11530. Waves 3 to 5 feet.

Superior North Central 11440 11430 11436 13430 12530. Waves 3 to
6 feet overnight and Friday. Waves 4 to 7 feet Friday evening.

Superior South Central 12440 11446 12440 13430. Waves 3 to 6
feet.

Superior East 12430 11440 11446 14440. Waves 1 to 2 feet building
to 3 to 5 feet overnight. Waves 3 to 6 feet building to 4 to 7
feet Friday. Waves 5 to 8 feet Friday 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