171
FZUS63 KMQT 131501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EST Fri Feb 13 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 trough extends over eastern Lake Superior today. High
pressure then builds back to 30.1 inches over the Great Lakes by
Saturday morning before a weak 29.9 inch trough moves into the Upper
Great Lakes Saturday evening. Weak troughing of around 29.8 inches
hangs out over the Upper Great Lakes the rest of this weekend before
strengthening to 29.7 inches over Lake Superior via a 29.6 inch low
lifting over northern Ontario on Monday. Weak ridging of 30.2 inches
crosses back over Lake Superior on Tuesday ahead of a 29.3 inch low
lifting off of the Central Rockies.


LSZ162-132100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EST Fri Feb 13 2026 /900 AM CST Fri Feb 13 2026/

.REST OF TODAY...West winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northeast by
midnight, then veering southeast late. Waves calm to 2 feet.
.SATURDAY...South winds less than 10 knots becoming southwest
5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming east gales to
45 knots. A chance of snow showers, possibly mixed with rain.
Waves calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-132100-
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 AM EST Fri Feb 13 2026

.REST OF TODAY...West winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves 1 to 3 feet subsiding to calm to
2 feet.
.TONIGHT...Northwest winds 5 to 15 knots becoming south less than
10 knots by midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering southwest. Waves
calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming east gales to
40 knots. A chance of rain showers. A chance of snow showers.
Waves building to 8 to 11 feet occasionally to 14 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-132100-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 AM EST Fri Feb 13 2026

.REST OF TODAY...West winds 15 to 25 knots veering northwest by
late morning, then diminishing to 10 to 20 knots by mid
afternoon. Waves 3 to 5 feet occasionally to 7 feet subsiding to
1 to 3 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north by
midnight, then becoming southwest less than 10 knots late. Waves
subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots becoming east gales to
45 knots. A chance of snow showers. Waves building to 8 to
11 feet occasionally to 14 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-132100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EST Fri Feb 13 2026

.REST OF TODAY...West winds 15 to 25 knots becoming northwest
20 to 30 knots by late morning, then diminishing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots backing southwest late.
Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. Waves calm to 2 feet.
.SUNDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots increasing to gales to
40 knots. A chance of snow showers. Waves building to 7 to
10 feet occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-132100-
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 AM EST Fri Feb 13 2026

.REST OF TODAY...West winds 15 to 25 knots veering northwest.
Isolated snow showers late in the morning. Waves 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then backing west late. A slight chance of
freezing rain and snow showers in the evening. Waves subsiding to
calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 15 to
25 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots becoming southwest
10 to 20 knots after midnight. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
.SUNDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.SUNDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots becoming east gales to
45 knots. A chance of rain showers. A chance of snow showers.
Waves building to 7 to 10 feet occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-132100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EST Fri Feb 13 2026

.REST OF TODAY...Southwest winds 15 to 25 knots veering west by
late morning, then becoming northwest 20 to 30 knots by mid
afternoon. Scattered snow showers late in the morning. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 5 to
15 knots by midnight, then backing northwest late. Waves
subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots veering west in the
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots veering west. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots becoming east gales to
40 knots. A chance of snow showers, possibly mixed with rain.
Waves building to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-132100-
MAFOR 1316/
Superior West 11620 11610 11600 11200 12300 12400. Waves omitted
due to the lake being mostly ice covered.

Superior North Central 11730 12720 11710 11800 11600 11500 11400.
Waves 3 to 5 feet subsiding to 2 to 4 feet this afternoon. Waves
1 to 3 feet subsiding to 1 foot or less tonight. Waves 1 foot or
less Saturday morning.

Superior South Central 11630 11730 11720 12710 11600 11500 11400.
Waves 1 to 3 feet building to 2 to 4 feet this afternoon. Waves 2
to 4 feet subsiding to 1 to 3 feet tonight. Waves 2 feet or less
Saturday morning. Wave heights are for ice free areas.

Superior East 11630 12730 11720 11810 11700 11600 11500. Waves 3
to 6 feet this afternoon. Waves 3 to 6 feet subsiding to 2 to 4
feet tonight. Waves 1 to 2 feet Saturday morning.

$$

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