Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

38.0°F

Measurement Time: Tuesday, February 17, 2026, 6:00 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

32.5°F
Sunny
Sunny
22.7°F
34.7°F
66%
E 13.6 mph
15.7 mph
24.4°F
30.3°F
0 in
0%
6 mi
1015 mbar
0.7

Five Day Weather Forecast

Sunny
Tue
H: 37°F
L: 29°F
Moderate or heavy snow showers
Wed
H: 26°F
L: 21°F
Blowing snow
Thu
H: 27°F
L: 22°F
Blowing snow
Fri
H: 30°F
L: 25°F
Patchy moderate snow
Sat
H: 27°F
L: 18°F

Air Quality

AQI: 1 - Good
PM2.5: 2.48 μg/m3
PM10: 3.08 μg/m3
Carbon Monoxide: 160.68 μg/m3
Nitrogen Dioxide: 0.98 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 88 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:15 AM
Sunset: 5:27 PM
Daylight: 10 hrs 24 mins
Moonrise: 7:16 AM
Moon Transit: 12:28 AM
Moonset: 5:54 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:58 AM - 2:28 PM

Minor Periods

5:24 PM - 6:54 PM
6:46 AM - 8:16 AM

Action Rating: 5 out of 5

Winter Storm Warning issued February 17 at 1:58AM CST until February 19 at 12:00PM CST by NWS Duluth MN

Effective: Tue February 17, 2026, 1:58 AM
Expires: Tue February 17, 2026, 2:00 PM

* WHAT...Heavy snow expected. Total snow accumulations between 4 and 8 inches except between 10 and 15 inches for the higher terrain of the North Shore. Winds gusting as high as 50 mph. * WHERE...Northern Cook and Lake County. This also includes the Boundary Waters eastern and central area. * WHEN...From 9 PM this evening to noon CST Thursday. * IMPACTS...Near whiteout conditions are possible as visibilities may drop to around 1/4 mile due to falling and blowing snow. * ADDITIONAL DETAILS...Expect terrain enhancement to snowfall totals and snowfall rates along the North Shore terrain ridge parts of central Lake County. The heaviest snowfall rates will be Tuesday night and Wednesday morning.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 511 or visit www.511mn.org for Minnesota road information.


Blizzard Warning issued February 17 at 1:58AM CST until February 19 at 12:00PM CST by NWS Duluth MN

Effective: Tue February 17, 2026, 1:58 AM
Expires: Tue February 17, 2026, 2:00 PM

* WHAT...Blizzard conditions expected. Total snow accumulations between 10 and 18 inches. Easterly winds gusting as high as 60 mph. * WHERE...Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From 9 PM this evening to noon CST Thursday. * IMPACTS...The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages. Whiteout conditions are expected and will make travel treacherous and potentially life-threatening, especially along Highway 61 on the North Shore. * ADDITIONAL DETAILS...Expect terrain enhancement to snowfall totals and snowfall rates. The heaviest snowfall rates will be Tuesday night and Wednesday morning.

Do not travel unless you must due to emergencies only. If you must travel, especially along Highway 61 on the North Shore, have a winter survival kit with you. If you get stranded, stay with your vehicle. Call 511 or visit www.511mn.org for Minnesota road information.
Tuesday, February 17, 2026

Weather Forecast

Sunny
37°F
28.9°F
33.2°F
69%
0 in
0%
0%
23 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 3.63 μg/m3
PM10: 4.54 μg/m3
Carbon Monoxide: 171.52 μg/m3
Nitrogen Dioxide: 2.31 μg/m3
Sulphur Dioxide: 1.14 μg/m3
Ozone: 80.04 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:15 AM
Sunset: 5:27 PM
Daylight: 10 hrs 24 mins
Moonrise: 7:16 AM
Moon Transit: 12:28 AM
Moonset: 5:54 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:58 AM - 2:28 PM

Minor Periods

5:24 PM - 6:54 PM
6:46 AM - 8:16 AM

Action Rating: 5 out of 5

Wednesday, February 18, 2026

Weather Forecast

Moderate or heavy snow showers
26.2°F
20.8°F
25.1°F
89%
1.58 in
72%
48%
30.2 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 1.59 μg/m3
PM10: 1.85 μg/m3
Carbon Monoxide: 167.24 μg/m3
Nitrogen Dioxide: 0.99 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 85.08 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:15 AM
Sunset: 5:29 PM
Daylight: 10 hrs 27 mins
Moonrise: 7:33 AM
Moon Transit: 1:14 PM
Moonset: 7:10 PM
Moon Phase: New
Moon Illumination: 1.3%

Best Times for Fishing or Hunting

Major Periods

12:18 AM - 2:48 AM
12:44 AM - 3:14 PM

Minor Periods

6:40 PM - 8:10 PM
7:03 AM - 8:33 AM

Action Rating: 4 out of 5

Thursday, February 19, 2026

Weather Forecast

Blowing snow
27°F
22.3°F
24.2°F
90%
1.09 in
87%
69%
16.6 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 0.83 μg/m3
PM10: 0.84 μg/m3
Carbon Monoxide: 169.84 μg/m3
Nitrogen Dioxide: 1.09 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 81.28 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 12:15 AM
Sunset: 5:31 PM
Daylight: 10 hrs 30 mins
Moonrise: 7:48 AM
Moon Transit: 2:00 PM
Moonset: 8:27 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

1:04 AM - 3:34 AM
1:30 PM - 4:00 PM

Minor Periods

7:57 PM - 9:27 PM
7:18 AM - 8:48 AM

Action Rating: 3 out of 5

Friday, February 20, 2026

Weather Forecast

Blowing snow
29.8°F
24.7°F
27.6°F
91%
3.25 in
78%
61%
12.8 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 0.95 μg/m3
PM10: 0.99 μg/m3
Carbon Monoxide: 165.71 μg/m3
Nitrogen Dioxide: 1.33 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 79.92 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:15 AM
Sunset: 5:32 PM
Daylight: 10 hrs 34 mins
Moonrise: 8:05 AM
Moon Transit: 2:46 PM
Moonset: 9:46 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

1:50 AM - 4:20 AM
2:16 PM - 4:46 PM

Minor Periods

9:16 PM - 10:46 PM
7:35 AM - 9:05 AM

Action Rating: 2 out of 5

Saturday, February 21, 2026

Weather Forecast

Patchy moderate snow
26.5°F
18.4°F
22.5°F
83%
0.02 in
67%
43%
10.7 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 1.2 μg/m3
PM10: 1.33 μg/m3
Carbon Monoxide: 163.12 μg/m3
Nitrogen Dioxide: 1.32 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 80.77 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:14 AM
Sunset: 5:34 PM
Daylight: 10 hrs 37 mins
Moonrise: 8:23 AM
Moon Transit: 3:35 PM
Moonset: 11:07 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.4%

Best Times for Fishing or Hunting

Major Periods

2:38 AM - 5:08 AM
3:05 PM - 5:35 PM

Minor Periods

12:00 AM - 12:00 AM
7:53 AM - 9:23 AM

Action Rating: 3 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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