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

Current Water Temperature

32.0°F

Measurement Time: Saturday, September 19, 2026, 7:26 AM 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

58°F
Mostly Sunny
Mostly Sunny
87%
S 5 mph
54°F

Weather Forecast

Partly Sunny
This Afternoon
60°F - Partly Sunny
Slight Chance Rain Showers
Tonight
50°F - Slight Chance Rain Showers
Mostly Sunny
Sunday
59°F - Mostly Sunny
Mostly Cloudy
Sunday Night
44°F - Mostly Cloudy
Partly Sunny
Monday
56°F - Partly Sunny
Mostly Clear
Monday Night
42°F - Mostly Clear
Sunny
Tuesday
58°F - Sunny
Mostly Clear
Tuesday Night
44°F - Mostly Clear
Sunny
Wednesday
61°F - Sunny
Mostly Clear
Wednesday Night
45°F - Mostly Clear
Mostly Sunny
Thursday
63°F - Mostly Sunny
Partly Cloudy
Thursday Night
47°F - Partly Cloudy
Mostly Sunny
Friday
64°F - Mostly Sunny
Partly Cloudy
Friday Night
49°F - Partly Cloudy

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

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

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

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: 6:43 AM
Sun Transit: 12:52 AM
Sunset: 7:00 PM
Daylight: 12 hrs 17 mins
Moonrise: 4:36 PM
Moon Transit: 8:36 PM
Moonset: 12:37 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

7:44 AM - 10:14 AM
8:06 PM - 10:36 PM

Minor Periods

4:06 PM - 5:36 PM
12:00 AM - 12:00 AM

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: 6:43 AM
Sun Transit: 12:52 AM
Sunset: 7:00 PM
Daylight: 12 hrs 17 mins
Moonrise: 4:36 PM
Moon Transit: 8:36 PM
Moonset: 12:37 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

7:44 AM - 10:14 AM
8:06 PM - 10:36 PM

Minor Periods

4:06 PM - 5:36 PM
12:00 AM - 12:00 AM

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: 6:44 AM
Sun Transit: 12:51 AM
Sunset: 6:58 PM
Daylight: 12 hrs 14 mins
Moonrise: 5:04 PM
Moon Transit: 9:25 PM
Moonset: 12:44 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

8:33 AM - 11:03 AM
8:55 PM - 11:25 PM

Minor Periods

4:34 PM - 6:04 PM
12:14 AM - 1:44 AM

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: 6:44 AM
Sun Transit: 12:51 AM
Sunset: 6:58 PM
Daylight: 12 hrs 14 mins
Moonrise: 5:04 PM
Moon Transit: 9:25 PM
Moonset: 12:44 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

8:33 AM - 11:03 AM
8:55 PM - 11:25 PM

Minor Periods

4:34 PM - 6:04 PM
12:14 AM - 1:44 AM

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: 6:46 AM
Sun Transit: 12:51 AM
Sunset: 6:56 PM
Daylight: 12 hrs 11 mins
Moonrise: 5:26 PM
Moon Transit: 10:11 PM
Moonset: 1:55 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

9:20 AM - 11:50 AM
12:00 AM - 12:00 AM

Minor Periods

4:56 PM - 6:26 PM
1:25 AM - 2:55 AM

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: 6:46 AM
Sun Transit: 12:51 AM
Sunset: 6:56 PM
Daylight: 12 hrs 11 mins
Moonrise: 5:26 PM
Moon Transit: 10:11 PM
Moonset: 1:55 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

9:20 AM - 11:50 AM
12:00 AM - 12:00 AM

Minor Periods

4:56 PM - 6:26 PM
1:25 AM - 2:55 AM

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: 6:47 AM
Sun Transit: 12:51 AM
Sunset: 6:54 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:44 PM
Moon Transit: 10:55 PM
Moonset: 3:07 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

10:06 AM - 12:36 AM
12:00 AM - 12:00 AM

Minor Periods

5:14 PM - 6:44 PM
2:37 AM - 4:07 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: 6:47 AM
Sun Transit: 12:51 AM
Sunset: 6:54 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:44 PM
Moon Transit: 10:55 PM
Moonset: 3:07 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

10:06 AM - 12:36 AM
12:00 AM - 12:00 AM

Minor Periods

5:14 PM - 6:44 PM
2:37 AM - 4:07 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: 6:49 AM
Sun Transit: 12:50 AM
Sunset: 6:52 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:01 PM
Moon Transit: 11:40 PM
Moonset: 4:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:31 PM - 7:01 PM
3:50 AM - 5:20 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: 6:49 AM
Sun Transit: 12:50 AM
Sunset: 6:52 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:01 PM
Moon Transit: 11:40 PM
Moonset: 4:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:31 PM - 7:01 PM
3:50 AM - 5:20 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: 6:50 AM
Sun Transit: 12:50 AM
Sunset: 6:50 PM
Daylight: 12 hrs mins
Moonrise: 6:17 PM
Moon Transit: 12:00 AM
Moonset: 5:32 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:47 PM - 7:17 PM
5:02 AM - 6:32 AM

Action Rating: 5 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: 6:50 AM
Sun Transit: 12:50 AM
Sunset: 6:50 PM
Daylight: 12 hrs mins
Moonrise: 6:17 PM
Moon Transit: 12:00 AM
Moonset: 5:32 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:47 PM - 7:17 PM
5:02 AM - 6:32 AM

Action Rating: 5 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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