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

Current Water Temperature

32.0°F

Measurement Time: Friday, August 28, 2026, 11:17 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

65°F
Sunny
Sunny
71%
S 5 mph
55°F

Weather Forecast

Sunny
This Afternoon
66°F - Sunny
Partly Cloudy
Tonight
53°F - Partly Cloudy
Partly Sunny
Saturday
68°F - Partly Sunny
Patchy Fog
Saturday Night
57°F - Patchy Fog
Cloudy then Slight Chance Rain Showers
Sunday
70°F - Cloudy then Slight Chance Rain Showers
Chance Rain Showers
Sunday Night
57°F - Chance Rain Showers
Chance Showers And Thunderstorms
Monday
73°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday Night
60°F - Chance Showers And Thunderstorms
Mostly Sunny
Tuesday
78°F - Mostly Sunny
Partly Cloudy
Tuesday Night
58°F - Partly Cloudy
Mostly Sunny
Wednesday
75°F - Mostly Sunny
Partly Cloudy
Wednesday Night
57°F - Partly Cloudy
Mostly Sunny then Slight Chance Rain Showers
Thursday
72°F - Mostly Sunny then Slight Chance Rain Showers
Chance Rain Showers
Thursday Night
56°F - Chance Rain Showers

Astronomical

Sunrise: 6:12 AM
Sun Transit: 1:00 PM
Sunset: 7:47 PM
Daylight: 13 hrs 36 mins
Moonrise: 7:55 PM
Moon Transit: 1:02 AM
Moonset: 6:38 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:32 AM - 3:02 AM
12:56 AM - 3:26 PM

Minor Periods

7:25 PM - 8:55 PM
6:08 AM - 7:38 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: 6:12 AM
Sun Transit: 1:00 PM
Sunset: 7:47 PM
Daylight: 13 hrs 36 mins
Moonrise: 7:55 PM
Moon Transit: 1:02 AM
Moonset: 6:38 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:32 AM - 3:02 AM
12:56 AM - 3:26 PM

Minor Periods

7:25 PM - 8:55 PM
6:08 AM - 7:38 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: 6:12 AM
Sun Transit: 1:00 PM
Sunset: 7:47 PM
Daylight: 13 hrs 36 mins
Moonrise: 7:55 PM
Moon Transit: 1:02 AM
Moonset: 6:38 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:32 AM - 3:02 AM
12:56 AM - 3:26 PM

Minor Periods

7:25 PM - 8:55 PM
6:08 AM - 7:38 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: 6:13 AM
Sun Transit: 1:00 PM
Sunset: 7:45 PM
Daylight: 13 hrs 32 mins
Moonrise: 8:10 PM
Moon Transit: 1:45 AM
Moonset: 7:51 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:15 AM - 3:45 AM
12:00 AM - 12:00 AM

Minor Periods

7:40 PM - 9:10 PM
7:21 AM - 8:51 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: 6:13 AM
Sun Transit: 1:00 PM
Sunset: 7:45 PM
Daylight: 13 hrs 32 mins
Moonrise: 8:10 PM
Moon Transit: 1:45 AM
Moonset: 7:51 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:15 AM - 3:45 AM
12:00 AM - 12:00 AM

Minor Periods

7:40 PM - 9:10 PM
7:21 AM - 8:51 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: 6:14 AM
Sun Transit: 1:00 PM
Sunset: 7:43 PM
Daylight: 13 hrs 29 mins
Moonrise: 8:26 PM
Moon Transit: 12:00 AM
Moonset: 9:05 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

7:56 PM - 9:26 PM
8:35 AM - 10:05 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: 6:14 AM
Sun Transit: 1:00 PM
Sunset: 7:43 PM
Daylight: 13 hrs 29 mins
Moonrise: 8:26 PM
Moon Transit: 12:00 AM
Moonset: 9:05 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

7:56 PM - 9:26 PM
8:35 AM - 10:05 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: 6:16 AM
Sun Transit: 1:00 PM
Sunset: 7:41 PM
Daylight: 13 hrs 25 mins
Moonrise: 8:45 PM
Moon Transit: 3:15 AM
Moonset: 10:22 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:45 AM - 5:15 AM
3:11 PM - 5:41 PM

Minor Periods

8:15 PM - 9:45 PM
9:52 AM - 11:22 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: 6:16 AM
Sun Transit: 1:00 PM
Sunset: 7:41 PM
Daylight: 13 hrs 25 mins
Moonrise: 8:45 PM
Moon Transit: 3:15 AM
Moonset: 10:22 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:45 AM - 5:15 AM
3:11 PM - 5:41 PM

Minor Periods

8:15 PM - 9:45 PM
9:52 AM - 11:22 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: 6:17 AM
Sun Transit: 12:58 AM
Sunset: 7:39 PM
Daylight: 13 hrs 22 mins
Moonrise: 9:07 PM
Moon Transit: 4:03 AM
Moonset: 11:41 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:33 AM - 6:03 AM
4:01 PM - 6:31 PM

Minor Periods

8:37 PM - 10:07 PM
11:11 AM - 12:41 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: 6:17 AM
Sun Transit: 12:58 AM
Sunset: 7:39 PM
Daylight: 13 hrs 22 mins
Moonrise: 9:07 PM
Moon Transit: 4:03 AM
Moonset: 11:41 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:33 AM - 6:03 AM
4:01 PM - 6:31 PM

Minor Periods

8:37 PM - 10:07 PM
11:11 AM - 12:41 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: 6:19 AM
Sun Transit: 12:58 AM
Sunset: 7:37 PM
Daylight: 13 hrs 19 mins
Moonrise: 9:35 PM
Moon Transit: 4:55 AM
Moonset: 1:03 PM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:25 AM - 6:55 AM
4:56 PM - 7:26 PM

Minor Periods

9:05 PM - 10:35 PM
12:33 AM - 2:03 PM

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: 6:19 AM
Sun Transit: 12:58 AM
Sunset: 7:37 PM
Daylight: 13 hrs 19 mins
Moonrise: 9:35 PM
Moon Transit: 4:55 AM
Moonset: 1:03 PM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:25 AM - 6:55 AM
4:56 PM - 7:26 PM

Minor Periods

9:05 PM - 10:35 PM
12:33 AM - 2:03 PM

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: 6:20 AM
Sun Transit: 12:58 AM
Sunset: 7:35 PM
Daylight: 13 hrs 15 mins
Moonrise: 10:16 PM
Moon Transit: 5:52 AM
Moonset: 2:24 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
5:54 PM - 8:24 PM

Minor Periods

9:46 PM - 11:16 PM
1:54 PM - 3:24 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: 6:20 AM
Sun Transit: 12:58 AM
Sunset: 7:35 PM
Daylight: 13 hrs 15 mins
Moonrise: 10:16 PM
Moon Transit: 5:52 AM
Moonset: 2:24 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
5:54 PM - 8:24 PM

Minor Periods

9:46 PM - 11:16 PM
1:54 PM - 3:24 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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