Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

36.0°F

Measurement Time: Thursday, February 26, 2026, 6:20 AM CST

Temperature Locations

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Lake Superior

Station Name: Grand Marais
Data Source: USGS

Elevation Above Sea Level: 607 feet

Nearest Address:
2nd Street
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.7517, -90.3283

Nearby Water Temperatures

Grand Marais Harbor, Grand Marais, MN (0.6 mi)
Poplar River, Lutsen, MN (19.4 mi)
Grand Portage River, Grand Portage, MN (33.3 mi)
Lake Superior, Lake Superior, MI (38.1 mi)
Baptism River, Illgen City, MN (49.7 mi)
Washington Creek, Windigo, MI (56.1 mi)
Kawishiwi River, Ely, MN (57.2 mi)
Dunka River, Babbitt, MN (71.4 mi)
Dunka River, Babbitt, MN (71.7 mi)
Partrige River, Babbitt, MN (74.9 mi)
Lake Superior, Two Harbors, MN (80.5 mi)
Chequamegon Bay, Ashland, WI (81.7 mi)
Saint Louis River, Hoyt Lakes, MN (81.9 mi)
Lake Superior, Calumet, MI (86.9 mi)
Presque Isle River, Tula, MI (87.2 mi)

Weather for Grand Marais, Minnesota

Current Weather

37.8°F
Partly cloudy
Partly cloudy
27.8°F
35.6°F
52%
W 18.8 mph
25.7 mph
26.2°F
33.8°F
0 in
50%
9 mi
994 mbar
0.7

Five Day Weather Forecast

Patchy moderate snow
Fri
H: 37°F
L: 13°F
Overcast
Sat
H: 14°F
L: -9°F
Sunny
Sun
H: 16°F
L: -2°F
Overcast
Mon
H: 27°F
L: 7°F
Light snow
Tue
H: 32°F
L: 17°F

Air Quality

AQI: 1 - Good
PM2.5: 2.48 μg/m3
PM10: 2.88 μg/m3
Carbon Monoxide: 163.68 μg/m3
Nitrogen Dioxide: 0.88 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 86 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:13 AM
Sunset: 5:43 PM
Daylight: 10 hrs 57 mins
Moonrise: 1:04 PM
Moon Transit: 9:29 PM
Moonset: 5:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.3%

Best Times for Fishing or Hunting

Major Periods

8:27 AM - 10:57 AM
8:59 PM - 11:29 PM

Minor Periods

12:34 AM - 2:04 PM
4:32 AM - 6:02 AM

Action Rating: 2 out of 5

High Wind Warning issued February 27 at 1:45AM CST until February 28 at 12:00AM CST by NWS Duluth MN

Effective: Fri February 27, 2026, 1:45 AM
Expires: Fri February 27, 2026, 1:45 PM

* WHAT...Northwest winds 20 to 30 mph with gusts up to 60 mph expected. * WHERE...Southern Cook County. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From noon today to midnight CST tonight. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

Watch for falling debris and tree limbs. Use caution if you must drive.


Wind Advisory issued February 27 at 1:45AM CST until February 28 at 12:00AM CST by NWS Duluth MN

Effective: Fri February 27, 2026, 1:45 AM
Expires: Fri February 27, 2026, 1:45 PM

* WHAT...West to northwest winds 15 to 25 mph with gusts up to 50 mph expected. * WHERE...In Minnesota, Carlton, South and Central St. Louis, North Cook and Lake Counties. In Wisconsin, Bayfield and Douglas Counties. This includes the Tribal Lands of the Bois Forte Band, Lake Vermilion area, the Fond du Lac Band and the Red Cliff Band. Other locations including the Apostle Islands National Lakeshore. This also includes the Boundary Waters eastern and central area. * WHEN...From noon today to midnight CST tonight. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.


Wind Advisory issued February 27 at 12:10PM CST until February 28 at 12:00AM CST by NWS Duluth MN

Effective: Fri February 27, 2026, 12:10 PM
Expires: Sat February 28, 2026, 12:00 AM

* WHAT...West winds 15 to 25 mph with gusts up to 50 mph. * WHERE...In Minnesota, Carlton, South and Central St. Louis, North Cook and Lake Counties. In Wisconsin, Bayfield and Douglas Counties. This includes the Tribal Lands of the Bois Forte Band, Lake Vermilion area, the Fond du Lac Band and the Red Cliff Band. Other locations including the Apostle Islands National Lakeshore. This also includes the Boundary Waters eastern and central area. * WHEN...Until midnight CST tonight. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.


High Wind Warning issued February 27 at 12:10PM CST until February 28 at 12:00AM CST by NWS Duluth MN

Effective: Fri February 27, 2026, 12:10 PM
Expires: Sat February 28, 2026, 12:00 AM

* WHAT...West winds 20 to 25 mph with gusts up to 65 mph expected. * WHERE...Southern Cook County. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...Until midnight CST tonight. * IMPACTS...Damaging winds will blow down trees and power lines. Power outages are expected. Travel will be difficult, especially for high profile vehicles.

Watch for falling debris and tree limbs. Use caution if you must drive.


Friday, February 27, 2026

Weather Forecast

Patchy moderate snow
37.4°F
13.3°F
26.5°F
75%
0.03 in
82%
14%
26.8 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 5.76 μg/m3
PM10: 6.31 μg/m3
Carbon Monoxide: 180.92 μg/m3
Nitrogen Dioxide: 2.55 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 80.84 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:13 AM
Sunset: 5:43 PM
Daylight: 10 hrs 57 mins
Moonrise: 1:04 PM
Moon Transit: 9:29 PM
Moonset: 5:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.3%

Best Times for Fishing or Hunting

Major Periods

8:27 AM - 10:57 AM
8:59 PM - 11:29 PM

Minor Periods

12:34 AM - 2:04 PM
4:32 AM - 6:02 AM

Action Rating: 2 out of 5

Saturday, February 28, 2026

Weather Forecast

Overcast
13.8°F
-9.2°F
5.7°F
60%
0 in
0%
0%
11.6 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 2.18 μg/m3
PM10: 2.61 μg/m3
Carbon Monoxide: 157.92 μg/m3
Nitrogen Dioxide: 0.87 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 84.64 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:13 AM
Sunset: 5:45 PM
Daylight: 11 hrs 1 mins
Moonrise: 2:27 PM
Moon Transit: 10:24 PM
Moonset: 5:37 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

9:24 AM - 11:54 AM
12:00 AM - 12:00 AM

Minor Periods

1:57 PM - 3:27 PM
5:07 AM - 6:37 AM

Action Rating: 3 out of 5

Sunday, March 1, 2026

Weather Forecast

Sunny
15.6°F
-2.2°F
5.7°F
60%
0 in
0%
0%
8.1 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 1.88 μg/m3
PM10: 2.26 μg/m3
Carbon Monoxide: 150.12 μg/m3
Nitrogen Dioxide: 0.99 μg/m3
Sulphur Dioxide: 1.29 μg/m3
Ozone: 88.6 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 12:13 AM
Sunset: 5:46 PM
Daylight: 11 hrs 4 mins
Moonrise: 3:49 PM
Moon Transit: 11:15 PM
Moonset: 6:04 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

10:17 AM - 12:47 AM
12:00 AM - 12:00 AM

Minor Periods

3:19 PM - 4:49 PM
5:34 AM - 7:04 AM

Action Rating: 3 out of 5

Monday, March 2, 2026

Weather Forecast

Overcast
27.4°F
7.3°F
17.5°F
78%
0 in
0%
0%
15.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 4.13 μg/m3
PM10: 4.43 μg/m3
Carbon Monoxide: 169.03 μg/m3
Nitrogen Dioxide: 2.41 μg/m3
Sulphur Dioxide: 1.42 μg/m3
Ozone: 86.12 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 12:13 AM
Sunset: 5:48 PM
Daylight: 11 hrs 8 mins
Moonrise: 5:07 PM
Moon Transit: 12:00 AM
Moonset: 6:24 AM
Moon Phase: Full
Moon Illumination: 99.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:06 AM - 1:36 PM

Minor Periods

4:37 PM - 6:07 PM
5:54 AM - 7:24 AM

Action Rating: 4 out of 5

Tuesday, March 3, 2026

Weather Forecast

Light snow
31.6°F
17.3°F
26.8°F
96%
0.03 in
67%
74%
9.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.27 μg/m3
PM10: 7.75 μg/m3
Carbon Monoxide: 183.18 μg/m3
Nitrogen Dioxide: 3.02 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 83.92 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 12:13 AM
Sunset: 5:49 PM
Daylight: 11 hrs 11 mins
Moonrise: 6:23 PM
Moon Transit: 12:02 AM
Moonset: 6:41 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:52 AM - 2:22 PM

Minor Periods

5:53 PM - 7:23 PM
6:11 AM - 7:41 AM

Action Rating: 5 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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