802
FZUS63 KMQT 201501
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 AM EST Fri Feb 20 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 29.2 inch low over Lake Michigan this morning traverses northern
Lower Michigan and Lake Huron this afternoon and evening,
progressively weakening to 29.5 inches as it does so. The low
continues to weaken Saturday, devolving into bent back troughing of
30.2 inches over the Upper Great Lakes by Sunday morning. Troughing
continues to weaken Sunday as a 31.0 inch high moves across
Manitoba. This high weakens to 30.5 inches as it moves through
northern Ontario Monday. Behind the ridge Monday night and Tuesday,
a deepening Clipper low of at least 29.6 inches moves into the
Northern Plains, reaching the U.P. Tuesday evening. Troughing around
29.7 inches remains over Lake Superior through Wednesday as a 29.5
inch low tracks to the south.


LSZ162-202100-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 AM EST Fri Feb 20 2026 /900 AM CST Fri Feb 20 2026/

.REST OF TODAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of snow. Waves 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...Northwest winds 10 to 20 knots. A slight chance of
snow showers. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots. A chance of snow
showers. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A slight chance of snow showers.
Waves building to 1 to 3 feet.
.SUNDAY...North winds 15 to 25 knots. Waves 1 to 3 feet.
.SUNDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves 1 to 3 feet.
.MONDAY...North winds 10 to 20 knots veering southeast. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots veering west. A chance of
snow showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-202100-
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 20 2026

.REST OF TODAY...North winds 15 to 25 knots increasing to 20 to
30 knots by late morning, then diminishing to 15 to 25 knots by
mid afternoon. Freezing spray. Snow. Waves 4 to 8 feet
occasionally to 10 feet.
.TONIGHT...North winds 10 to 20 knots. Freezing spray in the
evening. A chance of snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots. A slight chance of
snow showers. Waves building to 3 to 5 feet occasionally to
7 feet.
.SUNDAY...North winds 15 to 25 knots. A slight chance of snow
showers in the morning. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots. Heavy freezing spray.
Waves building to 5 to 8 feet occasionally to 10 feet.
.MONDAY...North winds 15 to 25 knots veering south. Waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...South winds 15 to 25 knots veering west. A chance of
snow showers. Waves building to 4 to 7 feet occasionally to
9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-202100-
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 20 2026

.REST OF TODAY...Northeast winds 15 to 25 knots increasing to
20 to 30 knots by late morning, then becoming north 15 to
25 knots by mid afternoon. Snow. Freezing spray in the afternoon.
Waves 5 to 8 feet occasionally to 10 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. Freezing spray. Snow showers in the
evening. Snow showers likely after midnight. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 10 to 20 knots. A chance of snow showers.
Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots. A slight chance of
snow showers. Waves building to 3 to 5 feet occasionally to
7 feet.
.SUNDAY...North winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. Heavy freezing spray. Waves building to 5 to
8 feet occasionally to 10 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots. Heavy freezing spray.
Waves building to 6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 20 to 30 knots becoming south 15 to
25 knots. Heavy freezing spray. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...South winds 20 to 30 knots veering northwest. Freezing
spray. A chance of snow showers. Waves building to 6 to 10 feet
occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-202100-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 AM EST Fri Feb 20 2026

.REST OF TODAY...Northeast winds 20 to 30 knots becoming north
15 to 25 knots by mid afternoon. A slight chance of rain and
sleet late in the morning. Snow. Waves 3 to 6 feet occasionally
to 8 feet building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. Snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 15 to 25 knots veering north by late
morning, then backing northwest by mid afternoon. Snow showers
likely in the morning, then a chance of snow showers in the
afternoon. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots. A chance of
snow showers. Waves 2 to 4 feet.
.SUNDAY...North winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Freezing spray. A slight chance of
snow showers. Waves building to 6 to 9 feet occasionally to
11 feet.
.SUNDAY NIGHT...North gales to 35 knots. Heavy freezing spray.
Waves building to 7 to 10 feet occasionally to 13 feet.
.MONDAY...North winds 20 to 30 knots becoming south 10 to
20 knots. Heavy freezing spray. Waves subsiding to 1 to 3 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...South winds 20 to 30 knots veering west. Freezing
spray. A chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-202100-
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 20 2026

.REST OF TODAY...East winds 20 to 30 knots backing northeast.
Rain, possibly mixed with sleet late in the morning. Snow. A
slight chance of rain in the afternoon. Waves 4 to 7 feet
occasionally to 9 feet subsiding to 3 to 6 feet occasionally to
8 feet.
.TONIGHT...Northeast winds 15 to 25 knots. Snow showers likely in
the evening, then a chance of snow showers after midnight. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then becoming north 15 to 25 knots by
mid afternoon. A chance of snow showers. Waves subsiding to 2 to
4 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...North winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. Freezing spray. A chance of snow showers. Waves
building to 6 to 9 feet occasionally to 11 feet.
.SUNDAY NIGHT...North gales to 35 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 8 to 11 feet
occasionally to 14 feet.
.MONDAY...North gales to 35 knots diminishing to 15 to 25 knots.
Heavy freezing spray. Waves subsiding to 1 to 3 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...South gales to 35 knots. Freezing spray. A chance of
snow showers. Waves building to 7 to 11 feet occasionally to
14 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-202100-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 AM EST Fri Feb 20 2026

.REST OF TODAY...East winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing northeast by mid
afternoon. A chance of rain late in the morning, then rain and
snow likely in the afternoon. Waves 3 to 5 feet occasionally to
7 feet subsiding to 2 to 4 feet.
.TONIGHT...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots late. A slight chance of rain showers in the evening. A
slight chance of snow showers. Waves 2 to 4 feet.
.SATURDAY...East winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then becoming northeast 10 to 20 knots
by mid afternoon. A chance of snow showers. Waves subsiding to
calm to 2 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots. A slight chance
of snow showers. Waves calm to 2 feet.
.SUNDAY...North winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A slight chance of snow showers in the morning.
Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots. Heavy freezing spray.
Waves building to 5 to 8 feet occasionally to 10 feet.
.MONDAY...North winds 20 to 30 knots becoming east 10 to
20 knots. Heavy freezing spray. Waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet.
.TUESDAY...Southeast winds 20 to 30 knots becoming south gales to
35 knots. Freezing spray. A chance of snow showers. Snow showers
likely. Waves building to 8 to 11 feet occasionally to 14 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-202100-
MAFOR 2016/
Superior West 11831 11830 11820 11810 14710. A chance of snow
this afternoon. A chance of snow showers Saturday morning. Waves
3 to 6 feet this afternoon. Waves 3 to 5 feet subsiding to 2 to 4
feet tonight. Waves 2 to 3 feet Saturday morning.

Superior North Central 11147 11137 12837 11137 11827 12820. Waves
5 to 8 feet this afternoon. Waves 5 to 8 feet subsiding to 3 to 5
feet tonight. Waves 3 to 5 feet Saturday morning.

Superior South Central 12137 14837 11737 11827. Waves 4 to 7 feet
this afternoon and tonight. Waves 3 to 5 feet Saturday morning.

Superior East 11247 11147 11137 11130 11230 11130 11120 11220. A
chance of snow showers Saturday morning. Waves 4 to 7 feet
subsiding to 3 to 6 feet this afternoon. Waves 3 to 5 feet
tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet Saturday
morning.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes