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

7°F
Sunny
Sunny
-5.1°F
7.4°F
41%
NNW 7.4 mph
8.8 mph
-5.6°F
-7.9°F
0 in
0%
6 mi
1019 mbar
0.6

Five Day Weather Forecast

Patchy moderate snow
Tue
H: 19°F
L: 3°F
Overcast
Wed
H: 36°F
L: 18°F
Mist
Thu
H: 37°F
L: 30°F
Fog
Fri
H: 37°F
L: 31°F
Fog
Sat
H: 34°F
L: 32°F

Air Quality

AQI: 1 - Good
PM2.5: 3.08 μg/m3
PM10: 3.58 μg/m3
Carbon Monoxide: 195.68 μg/m3
Nitrogen Dioxide: 0.98 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 90 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

Tuesday, March 17, 2026

Weather Forecast

Patchy moderate snow
19°F
3.4°F
12.3°F
54%
0.03 in
84%
9%
13.2 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.39 μg/m3
PM10: 3.93 μg/m3
Carbon Monoxide: 202.76 μg/m3
Nitrogen Dioxide: 0.95 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 86.68 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

Overcast
36.3°F
17.6°F
26.3°F
86%
0 in
0%
3%
13 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 4.78 μg/m3
PM10: 5.13 μg/m3
Carbon Monoxide: 199.36 μg/m3
Nitrogen Dioxide: 2.39 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 94.44 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

Mist
36.9°F
29.8°F
33.1°F
95%
0.38 in
88%
19%
6.5 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 1.81 μg/m3
PM10: 1.99 μg/m3
Carbon Monoxide: 170.88 μg/m3
Nitrogen Dioxide: 1.43 μg/m3
Sulphur Dioxide: 0.81 μg/m3
Ozone: 99.08 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
37°F
30.5°F
33.4°F
92%
0.59 in
89%
34%
6.9 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 9.55 μg/m3
PM10: 9.91 μg/m3
Carbon Monoxide: 168.57 μg/m3
Nitrogen Dioxide: 2.55 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 99.48 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

Saturday, March 21, 2026

Weather Forecast

Fog
33.9°F
31.6°F
32.8°F
98%
0.1 in
81%
49%
9.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 2.39 μg/m3
PM10: 2.86 μg/m3
Carbon Monoxide: 153.05 μg/m3
Nitrogen Dioxide: 2.25 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 88.08 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:00 AM
Sunset: 7:16 PM
Daylight: 12 hrs 14 mins
Moonrise: 7:48 AM
Moon Transit: 3:21 PM
Moonset: 11:14 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

2:21 AM - 4:51 AM
2:51 PM - 5:21 PM

Minor Periods

12:00 AM - 12:00 AM
7:18 AM - 8:48 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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