Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

52.5°F

Measurement Time: Monday, August 31, 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

60°F

Conditions: Patchy Fog

Humidity: 94%

Wind: E 10 mph

Dew Point: 58°F

Weather Forecast

Overnight
56°F - Patchy Fog

Monday
68°F - Patchy Fog

Monday Night
57°F - Partly Cloudy

Tuesday
72°F - Mostly Sunny

Tuesday Night
56°F - Mostly Cloudy

Wednesday
68°F - Partly Sunny

Wednesday Night
54°F - Partly Cloudy

Thursday
64°F - Mostly Sunny

Thursday Night
55°F - Mostly Cloudy then Slight Chance Rain Showers

Friday
69°F - Slight Chance Showers And Thunderstorms

Friday Night
57°F - Slight Chance Showers And Thunderstorms then Partly Cloudy

Saturday
71°F - Slight Chance Rain Showers

Saturday Night
59°F - Slight Chance Rain Showers

Sunday
71°F - Slight Chance Rain Showers

Astronomical

Sunrise: 6:19 AM
Sun Transit: 1:01 PM
Sunset: 7:44 PM
Daylight: 13 hrs 25 mins

Moonrise: 8:48 PM
Moon Transit: 3:18 AM
Moonset: 10:24 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
3:09 PM - 5:39 PM

Minor Periods

8:18 PM - 9:48 PM
9:54 AM - 11:24 AM

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: 6:19 AM
Sun Transit: 1:01 PM
Sunset: 7:44 PM
Daylight: 13 hrs 25 mins

Moonrise: 8:48 PM
Moon Transit: 3:18 AM
Moonset: 10:24 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
3:09 PM - 5:39 PM

Minor Periods

8:18 PM - 9:48 PM
9:54 AM - 11:24 AM

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: 6:19 AM
Sun Transit: 1:01 PM
Sunset: 7:44 PM
Daylight: 13 hrs 25 mins

Moonrise: 8:48 PM
Moon Transit: 3:18 AM
Moonset: 10:24 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
3:09 PM - 5:39 PM

Minor Periods

8:18 PM - 9:48 PM
9:54 AM - 11:24 AM

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: 6:19 AM
Sun Transit: 1:01 PM
Sunset: 7:44 PM
Daylight: 13 hrs 25 mins

Moonrise: 8:48 PM
Moon Transit: 3:18 AM
Moonset: 10:24 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
3:09 PM - 5:39 PM

Minor Periods

8:18 PM - 9:48 PM
9:54 AM - 11:24 AM

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: 6:20 AM
Sun Transit: 1:01 PM
Sunset: 7:42 PM
Daylight: 13 hrs 21 mins

Moonrise: 9:10 PM
Moon Transit: 4:06 AM
Moonset: 11:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:36 AM - 6:06 AM
3:59 PM - 6:29 PM

Minor Periods

8:40 PM - 10:10 PM
11:13 AM - 12:43 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: 6:20 AM
Sun Transit: 1:01 PM
Sunset: 7:42 PM
Daylight: 13 hrs 21 mins

Moonrise: 9:10 PM
Moon Transit: 4:06 AM
Moonset: 11:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:36 AM - 6:06 AM
3:59 PM - 6:29 PM

Minor Periods

8:40 PM - 10:10 PM
11:13 AM - 12:43 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: 6:21 AM
Sun Transit: 1:00 PM
Sunset: 7:40 PM
Daylight: 13 hrs 18 mins

Moonrise: 9:39 PM
Moon Transit: 4:58 AM
Moonset: 1:05 PM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
4:53 PM - 7:23 PM

Minor Periods

9:09 PM - 10:39 PM
12:35 AM - 2:05 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: 6:21 AM
Sun Transit: 1:00 PM
Sunset: 7:40 PM
Daylight: 13 hrs 18 mins

Moonrise: 9:39 PM
Moon Transit: 4:58 AM
Moonset: 1:05 PM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
4:53 PM - 7:23 PM

Minor Periods

9:09 PM - 10:39 PM
12:35 AM - 2:05 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: 6:23 AM
Sun Transit: 1:00 PM
Sunset: 7:38 PM
Daylight: 13 hrs 15 mins

Moonrise: 10:19 PM
Moon Transit: 5:55 AM
Moonset: 2:26 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:25 AM - 7:55 AM
5:52 PM - 8:22 PM

Minor Periods

9:49 PM - 11:19 PM
1:56 PM - 3:26 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: 6:23 AM
Sun Transit: 1:00 PM
Sunset: 7:38 PM
Daylight: 13 hrs 15 mins

Moonrise: 10:19 PM
Moon Transit: 5:55 AM
Moonset: 2:26 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:25 AM - 7:55 AM
5:52 PM - 8:22 PM

Minor Periods

9:49 PM - 11:19 PM
1:56 PM - 3:26 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: 6:24 AM
Sun Transit: 1:00 PM
Sunset: 7:36 PM
Daylight: 13 hrs 11 mins

Moonrise: 11:13 PM
Moon Transit: 6:55 AM
Moonset: 3:39 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:25 AM - 8:55 AM
6:54 PM - 9:24 PM

Minor Periods

12:00 AM - 12:00 AM
3:09 PM - 4:39 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: 6:24 AM
Sun Transit: 1:00 PM
Sunset: 7:36 PM
Daylight: 13 hrs 11 mins

Moonrise: 11:13 PM
Moon Transit: 6:55 AM
Moonset: 3:39 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:25 AM - 8:55 AM
6:54 PM - 9:24 PM

Minor Periods

12:00 AM - 12:00 AM
3:09 PM - 4:39 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: 6:26 AM
Sun Transit: 1:00 PM
Sunset: 7:34 PM
Daylight: 13 hrs 8 mins

Moonrise: 12:13 AM
Moon Transit: 7:58 AM
Moonset: 4:41 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
7:57 PM - 10:27 PM

Minor Periods

4:11 PM - 5:41 PM
12:00 AM - 12:00 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: 6:26 AM
Sun Transit: 1:00 PM
Sunset: 7:34 PM
Daylight: 13 hrs 8 mins

Moonrise: 12:13 AM
Moon Transit: 7:58 AM
Moonset: 4:41 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
7:57 PM - 10:27 PM

Minor Periods

4:11 PM - 5:41 PM
12:00 AM - 12:00 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: 6:27 AM
Sun Transit: 1:00 PM
Sunset: 7:32 PM
Daylight: 13 hrs 5 mins

Moonrise: 12:23 AM
Moon Transit: 9:01 AM
Moonset: 5:27 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:31 AM - 11:01 AM
8:58 PM - 11:28 PM

Minor Periods

4:57 PM - 6:27 PM
12:00 AM - 12:00 AM

Action Rating: 2 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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