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

Current Water Temperature

32.0°F

Measurement Time: Monday, October 5, 2026, 10:58 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

53°F
Mostly Sunny
Mostly Sunny
61%
S 10 mph
40°F

Weather Forecast

Mostly Sunny
This Afternoon
54°F - Mostly Sunny
Chance Rain Showers
Tonight
42°F - Chance Rain Showers
Chance Rain Showers then Mostly Cloudy
Tuesday
65°F - Chance Rain Showers then Mostly Cloudy
Partly Cloudy
Tuesday Night
46°F - Partly Cloudy
Sunny
Wednesday
62°F - Sunny
Partly Cloudy
Wednesday Night
40°F - Partly Cloudy
Mostly Sunny
Thursday
57°F - Mostly Sunny
Partly Cloudy
Thursday Night
39°F - Partly Cloudy
Mostly Sunny
Friday
55°F - Mostly Sunny
Mostly Cloudy
Friday Night
41°F - Mostly Cloudy
Mostly Cloudy
Saturday
59°F - Mostly Cloudy
Slight Chance Rain Showers
Saturday Night
48°F - Slight Chance Rain Showers
Slight Chance Rain Showers then Partly Sunny
Sunday
59°F - Slight Chance Rain Showers then Partly Sunny
Slight Chance Rain Showers
Sunday Night
40°F - Slight Chance Rain Showers

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:47 AM
Sunset: 6:30 PM
Daylight: 11 hrs 26 mins
Moonrise: 12:49 AM
Moon Transit: 8:47 AM
Moonset: 4:30 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:17 AM - 10:47 AM
8:46 PM - 11:16 PM

Minor Periods

4:00 PM - 5:30 PM
12:19 AM - 1:49 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: 7:04 AM
Sun Transit: 12:47 AM
Sunset: 6:30 PM
Daylight: 11 hrs 26 mins
Moonrise: 12:49 AM
Moon Transit: 8:47 AM
Moonset: 4:30 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:17 AM - 10:47 AM
8:46 PM - 11:16 PM

Minor Periods

4:00 PM - 5:30 PM
12:19 AM - 1:49 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: 7:04 AM
Sun Transit: 12:47 AM
Sunset: 6:30 PM
Daylight: 11 hrs 26 mins
Moonrise: 12:49 AM
Moon Transit: 8:47 AM
Moonset: 4:30 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:17 AM - 10:47 AM
8:46 PM - 11:16 PM

Minor Periods

4:00 PM - 5:30 PM
12:19 AM - 1:49 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: 7:05 AM
Sun Transit: 12:46 AM
Sunset: 6:28 PM
Daylight: 11 hrs 23 mins
Moonrise: 2:11 AM
Moon Transit: 9:39 AM
Moonset: 4:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:09 AM - 11:39 AM

Minor Periods

4:21 PM - 5:51 PM
1:41 AM - 3:11 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: 7:05 AM
Sun Transit: 12:46 AM
Sunset: 6:28 PM
Daylight: 11 hrs 23 mins
Moonrise: 2:11 AM
Moon Transit: 9:39 AM
Moonset: 4:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:09 AM - 11:39 AM

Minor Periods

4:21 PM - 5:51 PM
1:41 AM - 3:11 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: 7:06 AM
Sun Transit: 12:46 AM
Sunset: 6:26 PM
Daylight: 11 hrs 19 mins
Moonrise: 3:30 AM
Moon Transit: 10:27 AM
Moonset: 5:09 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:57 AM - 12:27 AM

Minor Periods

4:39 PM - 6:09 PM
3:00 AM - 4:30 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: 7:06 AM
Sun Transit: 12:46 AM
Sunset: 6:26 PM
Daylight: 11 hrs 19 mins
Moonrise: 3:30 AM
Moon Transit: 10:27 AM
Moonset: 5:09 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:57 AM - 12:27 AM

Minor Periods

4:39 PM - 6:09 PM
3:00 AM - 4:30 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: 7:08 AM
Sun Transit: 12:46 AM
Sunset: 6:24 PM
Daylight: 11 hrs 16 mins
Moonrise: 4:48 AM
Moon Transit: 11:13 AM
Moonset: 5:25 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:43 AM - 1:13 PM

Minor Periods

4:55 PM - 6:25 PM
4:18 AM - 5:48 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: 7:08 AM
Sun Transit: 12:46 AM
Sunset: 6:24 PM
Daylight: 11 hrs 16 mins
Moonrise: 4:48 AM
Moon Transit: 11:13 AM
Moonset: 5:25 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:43 AM - 1:13 PM

Minor Periods

4:55 PM - 6:25 PM
4:18 AM - 5:48 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: 7:09 AM
Sun Transit: 12:45 AM
Sunset: 6:22 PM
Daylight: 11 hrs 13 mins
Moonrise: 6:03 AM
Moon Transit: 11:58 AM
Moonset: 5:40 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:28 AM - 1:58 PM

Minor Periods

5:10 PM - 6:40 PM
5:33 AM - 7:03 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: 7:09 AM
Sun Transit: 12:45 AM
Sunset: 6:22 PM
Daylight: 11 hrs 13 mins
Moonrise: 6:03 AM
Moon Transit: 11:58 AM
Moonset: 5:40 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:28 AM - 1:58 PM

Minor Periods

5:10 PM - 6:40 PM
5:33 AM - 7:03 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: 7:11 AM
Sun Transit: 12:45 AM
Sunset: 6:20 PM
Daylight: 11 hrs 9 mins
Moonrise: 7:17 AM
Moon Transit: 12:43 AM
Moonset: 5:57 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:13 AM - 2:43 PM

Minor Periods

5:27 PM - 6:57 PM
6:47 AM - 8:17 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: 7:11 AM
Sun Transit: 12:45 AM
Sunset: 6:20 PM
Daylight: 11 hrs 9 mins
Moonrise: 7:17 AM
Moon Transit: 12:43 AM
Moonset: 5:57 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:13 AM - 2:43 PM

Minor Periods

5:27 PM - 6:57 PM
6:47 AM - 8:17 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: 7:12 AM
Sun Transit: 12:45 AM
Sunset: 6:18 PM
Daylight: 11 hrs 6 mins
Moonrise: 8:31 AM
Moon Transit: 1:28 PM
Moonset: 6:16 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
12:58 AM - 3:28 PM

Minor Periods

5:46 PM - 7:16 PM
8:01 AM - 9:31 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: 7:12 AM
Sun Transit: 12:45 AM
Sunset: 6:18 PM
Daylight: 11 hrs 6 mins
Moonrise: 8:31 AM
Moon Transit: 1:28 PM
Moonset: 6:16 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
12:58 AM - 3:28 PM

Minor Periods

5:46 PM - 7:16 PM
8:01 AM - 9:31 AM

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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