Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

52.5°F

Measurement Time: Sunday, September 27, 2026, 10:18 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

57°F

Conditions: Mostly Cloudy

Humidity: 93%

Wind: SW 5 mph

Dew Point: 55°F

Weather Forecast

This Afternoon
59°F - Partly Sunny

Tonight
51°F - Partly Cloudy then Patchy Fog

Monday
58°F - Mostly Sunny

Monday Night
52°F - Cloudy

Tuesday
57°F - Rain Showers Likely

Tuesday Night
53°F - Rain Showers Likely

Wednesday
60°F - Chance Rain Showers

Wednesday Night
53°F - Chance Rain Showers

Thursday
59°F - Partly Sunny

Thursday Night
44°F - Partly Cloudy

Friday
55°F - Mostly Sunny

Friday Night
43°F - Partly Cloudy

Saturday
53°F - Partly Sunny

Saturday Night
44°F - Chance Rain Showers

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:52 AM
Sunset: 6:49 PM
Daylight: 11 hrs 54 mins

Moonrise: 6:53 PM
Moon Transit: 1:12 AM
Moonset: 8:07 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:42 AM - 3:12 AM
1:03 PM - 3:33 PM

Minor Periods

6:23 PM - 7:53 PM
7:37 AM - 9:07 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:52 AM
Sunset: 6:49 PM
Daylight: 11 hrs 54 mins

Moonrise: 6:53 PM
Moon Transit: 1:12 AM
Moonset: 8:07 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:42 AM - 3:12 AM
1:03 PM - 3:33 PM

Minor Periods

6:23 PM - 7:53 PM
7:37 AM - 9:07 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:52 AM
Sunset: 6:49 PM
Daylight: 11 hrs 54 mins

Moonrise: 6:53 PM
Moon Transit: 1:12 AM
Moonset: 8:07 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:42 AM - 3:12 AM
1:03 PM - 3:33 PM

Minor Periods

6:23 PM - 7:53 PM
7:37 AM - 9:07 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:51 AM
Sunset: 6:47 PM
Daylight: 11 hrs 50 mins

Moonrise: 7:14 PM
Moon Transit: 2:01 AM
Moonset: 9:27 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:31 AM - 4:01 AM
1:53 PM - 4:23 PM

Minor Periods

6:44 PM - 8:14 PM
8:57 AM - 10:27 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:51 AM
Sunset: 6:47 PM
Daylight: 11 hrs 50 mins

Moonrise: 7:14 PM
Moon Transit: 2:01 AM
Moonset: 9:27 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:31 AM - 4:01 AM
1:53 PM - 4:23 PM

Minor Periods

6:44 PM - 8:14 PM
8:57 AM - 10:27 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:51 AM
Sunset: 6:45 PM
Daylight: 11 hrs 47 mins

Moonrise: 7:42 PM
Moon Transit: 2:53 AM
Moonset: 10:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:23 AM - 4:53 AM
2:48 PM - 5:18 PM

Minor Periods

7:12 PM - 8:42 PM
10:20 AM - 11:50 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:51 AM
Sunset: 6:45 PM
Daylight: 11 hrs 47 mins

Moonrise: 7:42 PM
Moon Transit: 2:53 AM
Moonset: 10:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:23 AM - 4:53 AM
2:48 PM - 5:18 PM

Minor Periods

7:12 PM - 8:42 PM
10:20 AM - 11:50 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:51 AM
Sunset: 6:43 PM
Daylight: 11 hrs 43 mins

Moonrise: 8:19 PM
Moon Transit: 3:49 AM
Moonset: 12:13 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
3:46 PM - 6:16 PM

Minor Periods

7:49 PM - 9:19 PM
11:43 AM - 1:13 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:51 AM
Sunset: 6:43 PM
Daylight: 11 hrs 43 mins

Moonrise: 8:19 PM
Moon Transit: 3:49 AM
Moonset: 12:13 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
3:46 PM - 6:16 PM

Minor Periods

7:49 PM - 9:19 PM
11:43 AM - 1:13 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 12:50 AM
Sunset: 6:41 PM
Daylight: 11 hrs 40 mins

Moonrise: 9:09 PM
Moon Transit: 4:49 AM
Moonset: 1:30 PM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
4:48 PM - 7:18 PM

Minor Periods

8:39 PM - 10:09 PM
1:00 PM - 2:30 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 12:50 AM
Sunset: 6:41 PM
Daylight: 11 hrs 40 mins

Moonrise: 9:09 PM
Moon Transit: 4:49 AM
Moonset: 1:30 PM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:19 AM - 6:49 AM
4:48 PM - 7:18 PM

Minor Periods

8:39 PM - 10:09 PM
1:00 PM - 2:30 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:50 AM
Sunset: 6:39 PM
Daylight: 11 hrs 37 mins

Moonrise: 10:14 PM
Moon Transit: 5:52 AM
Moonset: 2:36 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
5:51 PM - 8:21 PM

Minor Periods

9:44 PM - 11:14 PM
2:06 PM - 3:36 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:50 AM
Sunset: 6:39 PM
Daylight: 11 hrs 37 mins

Moonrise: 10:14 PM
Moon Transit: 5:52 AM
Moonset: 2:36 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
5:51 PM - 8:21 PM

Minor Periods

9:44 PM - 11:14 PM
2:06 PM - 3:36 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:50 AM
Sunset: 6:37 PM
Daylight: 11 hrs 33 mins

Moonrise: 11:30 PM
Moon Transit: 6:54 AM
Moonset: 3:26 PM
Moon Phase: Last Quarter
Moon Illumination: 43.9%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
6:52 PM - 9:22 PM

Minor Periods

12:00 AM - 12:00 AM
2:56 PM - 4:26 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:50 AM
Sunset: 6:37 PM
Daylight: 11 hrs 33 mins

Moonrise: 11:30 PM
Moon Transit: 6:54 AM
Moonset: 3:26 PM
Moon Phase: Last Quarter
Moon Illumination: 43.9%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
6:52 PM - 9:22 PM

Minor Periods

12:00 AM - 12:00 AM
2:56 PM - 4:26 PM

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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