Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

50.5°F

Measurement Time: Friday, November 28, 2025, 2:18 AM CST

Temperature Locations

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Local Points of Interest

Lake Superior; Grand Marais Campground and Marina; Grand Marais Municipal Arena

Grand Marais Harbor

Station Name: 9099090 - Grand Marais, MN
Station Type: Fixed
Data Source: National Data Buoy Center

Elevation Above Sea Level: 617 feet

Nearest Address:
391 MN-61
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.749, -90.341

Nearby Water Temperatures

Lake Superior, Grand Marais, MN (0.6 mi)
Poplar River, Lutsen, MN (18.8 mi)
Grand Portage River, Grand Portage, MN (33.9 mi)
Lake Superior, Lake Superior, MI (38.4 mi)
Baptism River, Illgen City, MN (49.1 mi)
Kawishiwi River, Ely, MN (56.7 mi)
Washington Creek, Windigo, MI (56.7 mi)
Dunka River, Babbitt, MN (70.8 mi)
Dunka River, Babbitt, MN (71.1 mi)
Partrige River, Babbitt, MN (74.2 mi)
Lake Superior, Two Harbors, MN (79.9 mi)
Saint Louis River, Hoyt Lakes, MN (81.3 mi)
Chequamegon Bay, Ashland, WI (81.3 mi)
Presque Isle River, Tula, MI (87.2 mi)
Lake Superior, Calumet, MI (87.4 mi)

Weather for Grand Marais, Minnesota

Current Weather

10°F
Clear
Clear
-12.1°F
8.2°F
49%
N 29.3 mph
33.7 mph
-14.9°F
-4.5°F
0 in
0%
6 mi
1012 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 18°F
L: 6°F
Partly Cloudy
Tue
H: 17°F
L: 4°F
Moderate or heavy snow showers
Wed
H: 35°F
L: 21°F
Freezing fog
Thu
H: 32°F
L: 22°F
Fog
Fri
H: 35°F
L: 29°F

Air Quality

AQI: 1 - Good
PM2.5: 3.28 μg/m3
PM10: 3.78 μg/m3
Carbon Monoxide: 198.68 μg/m3
Nitrogen Dioxide: 0.78 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:00 AM
Sunset: 7:08 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:20 AM
Moon Transit: 11:19 AM
Moonset: 4:31 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:49 AM - 1:19 PM

Minor Periods

4:01 PM - 5:31 PM
5:50 AM - 7:20 AM

Action Rating: 3 out of 5

High Wind Warning issued March 15 at 2:56PM CDT until March 16 at 2:00PM CDT by NWS Duluth MN

Effective: Sun March 15, 2026, 2:56 PM
Expires: Mon March 16, 2026, 3:00 AM

* WHAT...North winds 15 to 25 mph with gusts up to 60 mph expected. * WHERE...Southern Cook County. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...From 7 PM this evening to 2 PM CDT Monday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles.

Remain in the lower levels of your home during the windstorm, and avoid windows. Watch for falling debris and tree limbs. Use caution if you must drive.
Monday, March 16, 2026

Weather Forecast

Sunny
18.1°F
6.3°F
11.1°F
57%
0 in
0%
3%
29.3 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 2.75 μg/m3
PM10: 3.38 μg/m3
Carbon Monoxide: 195.04 μg/m3
Nitrogen Dioxide: 0.85 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 84.28 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:00 AM
Sunset: 7:08 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:20 AM
Moon Transit: 11:19 AM
Moonset: 4:31 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:49 AM - 1:19 PM

Minor Periods

4:01 PM - 5:31 PM
5:50 AM - 7:20 AM

Action Rating: 3 out of 5

Tuesday, March 17, 2026

Weather Forecast

Partly Cloudy
17.1°F
3.6°F
11.5°F
73%
0 in
0%
3%
16.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 2.37 μg/m3
PM10: 2.71 μg/m3
Carbon Monoxide: 184.36 μg/m3
Nitrogen Dioxide: 0.89 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 87.4 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:00 AM
Sunset: 7:10 PM
Daylight: 12 hrs mins
Moonrise: 6:38 AM
Moon Transit: 12:05 AM
Moonset: 5:48 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:35 AM - 2:05 PM

Minor Periods

5:18 PM - 6:48 PM
6:08 AM - 7:38 AM

Action Rating: 5 out of 5

Wednesday, March 18, 2026

Weather Forecast

Moderate or heavy snow showers
34.7°F
20.8°F
26.9°F
89%
0.24 in
76%
15%
10.3 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 4.79 μg/m3
PM10: 5.1 μg/m3
Carbon Monoxide: 187.92 μg/m3
Nitrogen Dioxide: 2.07 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 94.72 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:00 AM
Sunset: 7:11 PM
Daylight: 12 hrs 3 mins
Moonrise: 6:54 AM
Moon Transit: 12:52 AM
Moonset: 7:06 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

6:36 PM - 8:06 PM
6:24 AM - 7:54 AM

Action Rating: 3 out of 5

Thursday, March 19, 2026

Weather Forecast

Freezing fog
32.3°F
21.9°F
29.6°F
96%
0.04 in
72%
46%
6 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 4.59 μg/m3
PM10: 4.82 μg/m3
Carbon Monoxide: 173.06 μg/m3
Nitrogen Dioxide: 2.16 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 97.68 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:00 AM
Sunset: 7:13 PM
Daylight: 12 hrs 7 mins
Moonrise: 7:10 AM
Moon Transit: 12:31 AM
Moonset: 8:26 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 AM
12:01 AM - 2:31 AM

Minor Periods

7:56 PM - 9:26 PM
6:40 AM - 8:10 AM

Action Rating: 4 out of 5

Friday, March 20, 2026

Weather Forecast

Fog
35.1°F
28.9°F
31.9°F
96%
0.18 in
56%
41%
12.3 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.38 μg/m3
PM10: 3.05 μg/m3
Carbon Monoxide: 167.37 μg/m3
Nitrogen Dioxide: 2.63 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 90.08 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 9:27 AM
Sunset: 7:14 PM
Daylight: 12 hrs 10 mins
Moonrise: 7:27 AM
Moon Transit: 2:28 PM
Moonset: 9:49 PM
Moon Phase: New
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
1:58 PM - 4:28 PM

Minor Periods

9:19 PM - 10:49 PM
6:57 AM - 8:27 AM

Action Rating: 4 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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