Water Temperature of the Grand Portage River in Grand Portage, MN

Current Water Temperature

32.0°F

Measurement Time: Saturday, September 12, 2026, 11:15 PM CDT

Temperature Locations

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Local Points of Interest

Grand Portage Bay; Lake Superior

Grand Portage River

Station Name: GRAND PORTAGE RIVER AT GRAND PORTAGE MN
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 623 feet

Nearest Address:
1 Upper Rd
Grand Portage, MN 55605
Cook County

GPS Coordinates: 47.9634982, -89.6834233

Nearby Water Temperatures

Washington Creek, Windigo, MI (25 mi)
Lake Superior, Grand Marais, MN (33.3 mi)
Grand Marais Harbor, Grand Marais, MN (33.9 mi)
Lake Superior, Lake Superior, MI (43.7 mi)
Poplar River, Lutsen, MN (52.6 mi)
Lake Superior, Calumet, MI (69.3 mi)
Pilgrim River, Houghton, MI (80.5 mi)
Baptism River, Illgen City, MN (82.8 mi)
Kawishiwi River, Ely, MN (85.7 mi)
Lake Superior, Isle Royale, MI (90.4 mi)
Keweenaw Bay, Jacobsville, MI (91.2 mi)
West Branch Ontonagon River, Bergland, MI (95.2 mi)
Presque Isle River, Tula, MI (98 mi)
Sturgeon River, Pelkie, MI (98 mi)
Falls River, L'Anse, MI (102.8 mi)

Weather for Grand Portage, Minnesota

Current Weather

52°F
Mostly Cloudy
Mostly Cloudy
82%
S 5 mph
46°F

Weather Forecast

Mostly Cloudy
Overnight
49°F - Mostly Cloudy
Mostly Sunny
Sunday
61°F - Mostly Sunny
Mostly Clear
Sunday Night
43°F - Mostly Clear
Partly Sunny then Chance Rain Showers
Monday
61°F - Partly Sunny then Chance Rain Showers
Rain Showers
Monday Night
53°F - Rain Showers
Chance Rain Showers then Mostly Sunny
Tuesday
63°F - Chance Rain Showers then Mostly Sunny
Mostly Clear
Tuesday Night
47°F - Mostly Clear
Mostly Sunny
Wednesday
62°F - Mostly Sunny
Chance Rain Showers
Wednesday Night
50°F - Chance Rain Showers
Chance Rain Showers
Thursday
65°F - Chance Rain Showers
Partly Cloudy
Thursday Night
50°F - Partly Cloudy
Mostly Sunny
Friday
66°F - Mostly Sunny
Partly Cloudy
Friday Night
50°F - Partly Cloudy
Mostly Sunny
Saturday
67°F - Mostly Sunny

Astronomical

Sunrise: 6:34 AM
Sun Transit: 12:54 AM
Sunset: 7:15 PM
Daylight: 12 hrs 41 mins
Moonrise: 9:37 AM
Moon Transit: 2:50 PM
Moonset: 7:52 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

2:00 AM - 4:30 AM
2:20 PM - 4:50 PM

Minor Periods

7:22 PM - 8:52 PM
9:07 AM - 10:37 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:54 AM
Sunset: 7:15 PM
Daylight: 12 hrs 41 mins
Moonrise: 9:37 AM
Moon Transit: 2:50 PM
Moonset: 7:52 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

2:00 AM - 4:30 AM
2:20 PM - 4:50 PM

Minor Periods

7:22 PM - 8:52 PM
9:07 AM - 10:37 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:54 AM
Sunset: 7:15 PM
Daylight: 12 hrs 41 mins
Moonrise: 9:37 AM
Moon Transit: 2:50 PM
Moonset: 7:52 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

2:00 AM - 4:30 AM
2:20 PM - 4:50 PM

Minor Periods

7:22 PM - 8:52 PM
9:07 AM - 10:37 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:54 AM
Sunset: 7:15 PM
Daylight: 12 hrs 41 mins
Moonrise: 9:37 AM
Moon Transit: 2:50 PM
Moonset: 7:52 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

2:00 AM - 4:30 AM
2:20 PM - 4:50 PM

Minor Periods

7:22 PM - 8:52 PM
9:07 AM - 10:37 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:54 AM
Sunset: 7:13 PM
Daylight: 12 hrs 38 mins
Moonrise: 10:51 AM
Moon Transit: 3:36 PM
Moonset: 8:13 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:46 AM - 5:16 AM
3:06 PM - 5:36 PM

Minor Periods

7:43 PM - 9:13 PM
10:21 AM - 11:51 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:54 AM
Sunset: 7:13 PM
Daylight: 12 hrs 38 mins
Moonrise: 10:51 AM
Moon Transit: 3:36 PM
Moonset: 8:13 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

2:46 AM - 5:16 AM
3:06 PM - 5:36 PM

Minor Periods

7:43 PM - 9:13 PM
10:21 AM - 11:51 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:53 AM
Sunset: 7:11 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:04 AM
Moon Transit: 4:24 PM
Moonset: 8:37 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:32 AM - 6:02 AM
3:54 PM - 6:24 PM

Minor Periods

8:07 PM - 9:37 PM
11:34 AM - 1:04 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:53 AM
Sunset: 7:11 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:04 AM
Moon Transit: 4:24 PM
Moonset: 8:37 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

3:32 AM - 6:02 AM
3:54 PM - 6:24 PM

Minor Periods

8:07 PM - 9:37 PM
11:34 AM - 1:04 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:53 AM
Sunset: 7:09 PM
Daylight: 12 hrs 31 mins
Moonrise: 1:14 PM
Moon Transit: 5:13 PM
Moonset: 9:08 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:21 AM - 6:51 AM
4:43 PM - 7:13 PM

Minor Periods

8:38 PM - 10:08 PM
12:44 AM - 2:14 PM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:53 AM
Sunset: 7:09 PM
Daylight: 12 hrs 31 mins
Moonrise: 1:14 PM
Moon Transit: 5:13 PM
Moonset: 9:08 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

4:21 AM - 6:51 AM
4:43 PM - 7:13 PM

Minor Periods

8:38 PM - 10:08 PM
12:44 AM - 2:14 PM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:53 AM
Sunset: 7:07 PM
Daylight: 12 hrs 28 mins
Moonrise: 2:19 PM
Moon Transit: 6:04 PM
Moonset: 9:48 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:11 AM - 7:41 AM
5:34 PM - 8:04 PM

Minor Periods

9:18 PM - 10:48 PM
1:49 PM - 3:19 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:53 AM
Sunset: 7:07 PM
Daylight: 12 hrs 28 mins
Moonrise: 2:19 PM
Moon Transit: 6:04 PM
Moonset: 9:48 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

5:11 AM - 7:41 AM
5:34 PM - 8:04 PM

Minor Periods

9:18 PM - 10:48 PM
1:49 PM - 3:19 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:52 AM
Sunset: 7:05 PM
Daylight: 12 hrs 24 mins
Moonrise: 3:14 PM
Moon Transit: 6:55 PM
Moonset: 10:38 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

6:02 AM - 8:32 AM
6:25 PM - 8:55 PM

Minor Periods

10:08 PM - 11:38 PM
2:44 PM - 4:14 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:52 AM
Sunset: 7:05 PM
Daylight: 12 hrs 24 mins
Moonrise: 3:14 PM
Moon Transit: 6:55 PM
Moonset: 10:38 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

6:02 AM - 8:32 AM
6:25 PM - 8:55 PM

Minor Periods

10:08 PM - 11:38 PM
2:44 PM - 4:14 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 12:52 AM
Sunset: 7:02 PM
Daylight: 12 hrs 21 mins
Moonrise: 4:00 PM
Moon Transit: 7:47 PM
Moonset: 11:37 PM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

6:54 AM - 9:24 AM
7:17 PM - 9:47 PM

Minor Periods

12:00 AM - 12:00 AM
3:30 PM - 5:00 PM

Action Rating: 4 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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