Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

44.2°F

Measurement Time: Monday, June 8, 2026, 2:18 AM CDT

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

48°F
Partly Cloudy
Partly Cloudy
48.3°F
58.5°F
93%
ESE 2.2 mph
2.8 mph
58.5°F
51.2°F
0 in
0%
1 mi
1016 mbar
0.1

Five Day Weather Forecast

Partly Cloudy
Sat
H: 68°F
L: 59°F
Sunny
Sun
H: 72°F
L: 58°F
Sunny
Mon
H: 78°F
L: 63°F
Sunny
Tue
H: 79°F
L: 68°F
Sunny
Wed
H: 69°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 5.7 μg/m3
PM10: 6.6 μg/m3
Carbon Monoxide: 118 μg/m3
Nitrogen Dioxide: 0.9 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 75 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 1:06 PM
Sunset: 8:59 PM
Daylight: 15 hrs 44 mins
Moonrise: 1:42 AM
Moon Transit: 10:14 AM
Moonset: 6:57 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:44 AM - 12:14 AM

Minor Periods

6:27 PM - 7:57 PM
1:12 AM - 2:42 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued July 10 at 9:53PM CDT until July 11 at 10:00AM CDT by NWS Duluth MN

Effective: Fri July 10, 2026, 9:53 PM
Expires: Sat July 11, 2026, 10:00 AM

* WHAT...Dense fog will reduce visibility to less than 1 NM. * WHERE...Grand Portage to Grand Marais MN, Grand Marais to Taconite Harbor MN, Taconite Harbor to Silver Bay Harbor MN and Silver Bay Harbor to Two Harbors MN. * WHEN...Until 10 AM CDT Saturday. * IMPACTS...Low visibility will make navigation difficult.

If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.
Saturday, July 11, 2026

Weather Forecast

Partly Cloudy
67.7°F
58.5°F
62.7°F
80%
0.03 in
49%
0%
7.2 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 4.84 μg/m3
PM10: 5.61 μg/m3
Carbon Monoxide: 127.42 μg/m3
Nitrogen Dioxide: 1.38 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 87.17 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 1:06 PM
Sunset: 8:59 PM
Daylight: 15 hrs 44 mins
Moonrise: 1:42 AM
Moon Transit: 10:14 AM
Moonset: 6:57 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:44 AM - 12:14 AM

Minor Periods

6:27 PM - 7:57 PM
1:12 AM - 2:42 AM

Action Rating: 2 out of 5

Sunday, July 12, 2026

Weather Forecast

Sunny
72.1°F
58.2°F
66.2°F
81%
0 in
19%
0%
11.6 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 7.39 μg/m3
PM10: 7.95 μg/m3
Carbon Monoxide: 123.13 μg/m3
Nitrogen Dioxide: 1.08 μg/m3
Sulphur Dioxide: 0.41 μg/m3
Ozone: 102.46 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 1:07 PM
Sunset: 8:58 PM
Daylight: 15 hrs 42 mins
Moonrise: 2:36 AM
Moon Transit: 11:20 AM
Moonset: 8:05 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:50 AM - 1:20 PM

Minor Periods

7:35 PM - 9:05 PM
2:06 AM - 3:36 AM

Action Rating: 3 out of 5

Monday, July 13, 2026

Weather Forecast

Sunny
77.5°F
63.1°F
70.6°F
70%
0 in
7%
0%
13.4 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 5.19 μg/m3
PM10: 5.54 μg/m3
Carbon Monoxide: 121.83 μg/m3
Nitrogen Dioxide: 0.79 μg/m3
Sulphur Dioxide: 0.48 μg/m3
Ozone: 104.88 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 1:07 PM
Sunset: 8:57 PM
Daylight: 15 hrs 41 mins
Moonrise: 3:46 AM
Moon Transit: 12:27 AM
Moonset: 8:58 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:57 AM - 2:27 PM

Minor Periods

8:28 PM - 9:58 PM
3:16 AM - 4:46 AM

Action Rating: 4 out of 5

Tuesday, July 14, 2026

Weather Forecast

Sunny
78.7°F
67.7°F
72.9°F
57%
0 in
3%
0%
10.1 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 3.62 μg/m3
PM10: 3.76 μg/m3
Carbon Monoxide: 122.28 μg/m3
Nitrogen Dioxide: 0.99 μg/m3
Sulphur Dioxide: 0.31 μg/m3
Ozone: 97.21 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 1:07 PM
Sunset: 8:56 PM
Daylight: 15 hrs 39 mins
Moonrise: 5:09 AM
Moon Transit: 1:31 PM
Moonset: 9:35 PM
Moon Phase: New
Moon Illumination: 1.9%

Best Times for Fishing or Hunting

Major Periods

12:27 AM - 2:57 AM
1:01 PM - 3:31 PM

Minor Periods

9:05 PM - 10:35 PM
4:39 AM - 6:09 AM

Action Rating: 4 out of 5

Wednesday, July 15, 2026

Weather Forecast

Sunny
69.3°F
62.4°F
66.2°F
53%
0 in
3%
0%
7.6 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 2.38 μg/m3
PM10: 2.44 μg/m3
Carbon Monoxide: 141.63 μg/m3
Nitrogen Dioxide: 0.79 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 74.13 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 1:07 PM
Sunset: 8:56 PM
Daylight: 15 hrs 37 mins
Moonrise: 6:38 AM
Moon Transit: 2:29 PM
Moonset: 10:03 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

1:28 AM - 3:58 AM
1:59 PM - 4:29 PM

Minor Periods

9:33 PM - 11:03 PM
6:08 AM - 7:38 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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