Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

45.0°F

Measurement Time: Wednesday, August 26, 2026, 6:25 AM CDT

Temperature Locations

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Lake Superior

Station Name: Grand Marais
Data Source: USGS

Elevation Above Sea Level: 607 feet

Nearest Address:
2nd Street
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.7517, -90.3283

Nearby Water Temperatures

Grand Marais Harbor, Grand Marais, MN (0.6 mi)
Poplar River, Lutsen, MN (19.4 mi)
Grand Portage River, Grand Portage, MN (33.3 mi)
Lake Superior, Lake Superior, MI (38.1 mi)
Baptism River, Illgen City, MN (49.7 mi)
Washington Creek, Windigo, MI (56.1 mi)
Kawishiwi River, Ely, MN (57.2 mi)
Dunka River, Babbitt, MN (71.4 mi)
Dunka River, Babbitt, MN (71.7 mi)
Partrige River, Babbitt, MN (74.9 mi)
Lake Superior, Two Harbors, MN (80.5 mi)
Chequamegon Bay, Ashland, WI (81.7 mi)
Saint Louis River, Hoyt Lakes, MN (81.9 mi)
Lake Superior, Calumet, MI (86.9 mi)
Presque Isle River, Tula, MI (87.2 mi)

Weather for Grand Marais, Minnesota

Current Weather

56°F

Conditions: Mostly Sunny

Humidity: 85%

Wind: 0 mph

Dew Point: 52°F

Weather Forecast

Today
68°F - Partly Sunny

Tonight
59°F - Chance Showers And Thunderstorms then Showers And Thunderstorms

Saturday
63°F - Slight Chance Rain Showers then Mostly Sunny

Saturday Night
47°F - Mostly Cloudy

Sunday
56°F - Partly Sunny

Sunday Night
47°F - Partly Cloudy

Monday
57°F - Mostly Cloudy then Rain Showers

Monday Night
51°F - Rain Showers

Tuesday
62°F - Slight Chance Rain Showers then Partly Sunny

Tuesday Night
48°F - Partly Cloudy

Wednesday
61°F - Mostly Sunny

Wednesday Night
50°F - Chance Rain Showers

Thursday
63°F - Chance Rain Showers then Partly Sunny

Thursday Night
48°F - Partly Cloudy

Astronomical

Sunrise: 6:34 AM
Sun Transit: 12:57 AM
Sunset: 7:21 PM
Daylight: 12 hrs 48 mins

Moonrise: 7:09 AM
Moon Transit: 1:23 PM
Moonset: 7:22 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:27 AM - 2:57 AM
12:53 AM - 3:23 PM

Minor Periods

6:52 PM - 8:22 PM
6:39 AM - 8:09 AM

Action Rating: 5 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: 6:34 AM
Sun Transit: 12:57 AM
Sunset: 7:21 PM
Daylight: 12 hrs 48 mins

Moonrise: 7:09 AM
Moon Transit: 1:23 PM
Moonset: 7:22 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:27 AM - 2:57 AM
12:53 AM - 3:23 PM

Minor Periods

6:52 PM - 8:22 PM
6:39 AM - 8:09 AM

Action Rating: 5 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: 6:34 AM
Sun Transit: 12:57 AM
Sunset: 7:21 PM
Daylight: 12 hrs 48 mins

Moonrise: 7:09 AM
Moon Transit: 1:23 PM
Moonset: 7:22 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:27 AM - 2:57 AM
12:53 AM - 3:23 PM

Minor Periods

6:52 PM - 8:22 PM
6:39 AM - 8:09 AM

Action Rating: 5 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: 6:35 AM
Sun Transit: 12:57 AM
Sunset: 7:19 PM
Daylight: 12 hrs 44 mins

Moonrise: 8:25 AM
Moon Transit: 2:08 PM
Moonset: 7:38 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
1:38 PM - 4:08 PM

Minor Periods

7:08 PM - 8:38 PM
7:55 AM - 9:25 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: 6:35 AM
Sun Transit: 12:57 AM
Sunset: 7:19 PM
Daylight: 12 hrs 44 mins

Moonrise: 8:25 AM
Moon Transit: 2:08 PM
Moonset: 7:38 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:12 AM - 3:42 AM
1:38 PM - 4:08 PM

Minor Periods

7:08 PM - 8:38 PM
7:55 AM - 9:25 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: 6:36 AM
Sun Transit: 12:57 AM
Sunset: 7:17 PM
Daylight: 12 hrs 41 mins

Moonrise: 9:39 AM
Moon Transit: 2:53 PM
Moonset: 7:56 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

1:57 AM - 4:27 AM
2:23 PM - 4:53 PM

Minor Periods

7:26 PM - 8:56 PM
9:09 AM - 10:39 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: 6:36 AM
Sun Transit: 12:57 AM
Sunset: 7:17 PM
Daylight: 12 hrs 41 mins

Moonrise: 9:39 AM
Moon Transit: 2:53 PM
Moonset: 7:56 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

1:57 AM - 4:27 AM
2:23 PM - 4:53 PM

Minor Periods

7:26 PM - 8:56 PM
9:09 AM - 10:39 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: 6:38 AM
Sun Transit: 12:56 AM
Sunset: 7:15 PM
Daylight: 12 hrs 37 mins

Moonrise: 10:53 AM
Moon Transit: 3:39 PM
Moonset: 8:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:09 PM - 5:39 PM

Minor Periods

7:46 PM - 9:16 PM
10:23 AM - 11:53 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: 6:38 AM
Sun Transit: 12:56 AM
Sunset: 7:15 PM
Daylight: 12 hrs 37 mins

Moonrise: 10:53 AM
Moon Transit: 3:39 PM
Moonset: 8:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
3:09 PM - 5:39 PM

Minor Periods

7:46 PM - 9:16 PM
10:23 AM - 11:53 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: 6:39 AM
Sun Transit: 12:56 AM
Sunset: 7:13 PM
Daylight: 12 hrs 34 mins

Moonrise: 12:06 AM
Moon Transit: 4:26 PM
Moonset: 8:41 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
3:56 PM - 6:26 PM

Minor Periods

8:11 PM - 9:41 PM
11:36 AM - 1:06 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: 6:39 AM
Sun Transit: 12:56 AM
Sunset: 7:13 PM
Daylight: 12 hrs 34 mins

Moonrise: 12:06 AM
Moon Transit: 4:26 PM
Moonset: 8:41 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
3:56 PM - 6:26 PM

Minor Periods

8:11 PM - 9:41 PM
11:36 AM - 1:06 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: 6:40 AM
Sun Transit: 12:56 AM
Sunset: 7:11 PM
Daylight: 12 hrs 31 mins

Moonrise: 1:15 PM
Moon Transit: 5:16 PM
Moonset: 9:12 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:18 AM - 6:48 AM
4:46 PM - 7:16 PM

Minor Periods

8:42 PM - 10:12 PM
12:45 AM - 2:15 PM

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: 6:40 AM
Sun Transit: 12:56 AM
Sunset: 7:11 PM
Daylight: 12 hrs 31 mins

Moonrise: 1:15 PM
Moon Transit: 5:16 PM
Moonset: 9:12 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:18 AM - 6:48 AM
4:46 PM - 7:16 PM

Minor Periods

8:42 PM - 10:12 PM
12:45 AM - 2:15 PM

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: 6:42 AM
Sun Transit: 12:55 AM
Sunset: 7:09 PM
Daylight: 12 hrs 27 mins

Moonrise: 2:20 PM
Moon Transit: 6:07 PM
Moonset: 9:52 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:08 AM - 7:38 AM
5:37 PM - 8:07 PM

Minor Periods

9:22 PM - 10:52 PM
1:50 PM - 3:20 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: 6:42 AM
Sun Transit: 12:55 AM
Sunset: 7:09 PM
Daylight: 12 hrs 27 mins

Moonrise: 2:20 PM
Moon Transit: 6:07 PM
Moonset: 9:52 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:08 AM - 7:38 AM
5:37 PM - 8:07 PM

Minor Periods

9:22 PM - 10:52 PM
1:50 PM - 3:20 PM

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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