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

Current Water Temperature

32.0°F

Measurement Time: Sunday, July 26, 2026, 9:29 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

65.3°F
Overcast
Overcast
65.3°F
77.5°F
73%
SW 7.6 mph
13.2 mph
73.9°F
66.7°F
0 in
100%
20 mi
957 mbar
4.3

Five Day Weather Forecast

Sunny
Sun
H: 79°F
L: 61°F
Sunny
Mon
H: 71°F
L: 58°F
Sunny
Tue
H: 69°F
L: 60°F
Sunny
Wed
H: 74°F
L: 58°F
Sunny
Thu
H: 81°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 4.3 μg/m3
PM10: 4.5 μg/m3
Carbon Monoxide: 136 μg/m3
Nitrogen Dioxide: 1 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 77 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 1:05 PM
Sunset: 8:42 PM
Daylight: 15 hrs 15 mins
Moonrise: 7:26 PM
Moon Transit: 11:11 PM
Moonset: 2:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

10:18 AM - 12:48 AM
12:00 AM - 12:00 AM

Minor Periods

6:56 PM - 8:26 PM
1:32 AM - 3:02 AM

Action Rating: 3 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
78.6°F
61.3°F
68.7°F
77%
0.02 in
36%
0%
9.2 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 6.08 μg/m3
PM10: 6.2 μg/m3
Carbon Monoxide: 136.67 μg/m3
Nitrogen Dioxide: 1.6 μg/m3
Sulphur Dioxide: 0.37 μg/m3
Ozone: 63 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 1:05 PM
Sunset: 8:42 PM
Daylight: 15 hrs 15 mins
Moonrise: 7:26 PM
Moon Transit: 11:11 PM
Moonset: 2:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

10:18 AM - 12:48 AM
12:00 AM - 12:00 AM

Minor Periods

6:56 PM - 8:26 PM
1:32 AM - 3:02 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Sunny
71.3°F
57.7°F
64.9°F
83%
0.05 in
57%
0%
6.5 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 4.5 μg/m3
PM10: 4.61 μg/m3
Carbon Monoxide: 125.96 μg/m3
Nitrogen Dioxide: 1.83 μg/m3
Sulphur Dioxide: 0.83 μg/m3
Ozone: 65.88 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 1:05 PM
Sunset: 8:41 PM
Daylight: 15 hrs 12 mins
Moonrise: 8:05 PM
Moon Transit: 12:00 AM
Moonset: 2:59 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:09 AM - 1:39 PM

Minor Periods

7:35 PM - 9:05 PM
2:29 AM - 3:59 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
69.1°F
59.8°F
64°F
64%
0 in
5%
0%
7.2 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 3.67 μg/m3
PM10: 3.78 μg/m3
Carbon Monoxide: 112.83 μg/m3
Nitrogen Dioxide: 1.7 μg/m3
Sulphur Dioxide: 0.66 μg/m3
Ozone: 59.54 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 1:05 PM
Sunset: 8:40 PM
Daylight: 15 hrs 10 mins
Moonrise: 8:35 PM
Moon Transit: 12:02 AM
Moonset: 4:05 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:59 AM - 2:29 PM

Minor Periods

8:05 PM - 9:35 PM
3:35 AM - 5:05 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
74.3°F
58.1°F
64.8°F
70%
0.04 in
43%
0%
6 mph
7.3


Air Quality

AQI: 1 - Good
PM2.5: 2.61 μg/m3
PM10: 2.82 μg/m3
Carbon Monoxide: 109.78 μg/m3
Nitrogen Dioxide: 2.07 μg/m3
Sulphur Dioxide: 0.33 μg/m3
Ozone: 60.71 μg/m3

Astronomical

Sunrise: 5:31 AM
Sun Transit: 1:05 PM
Sunset: 8:39 PM
Daylight: 15 hrs 7 mins
Moonrise: 8:58 PM
Moon Transit: 12:50 AM
Moonset: 5:15 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:20 AM - 2:50 AM
12:46 AM - 3:16 PM

Minor Periods

8:28 PM - 9:58 PM
4:45 AM - 6:15 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
81.2°F
61.6°F
70.7°F
80%
0.27 in
71%
0%
13.4 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 1.84 μg/m3
PM10: 2.11 μg/m3
Carbon Monoxide: 150.75 μg/m3
Nitrogen Dioxide: 1.9 μg/m3
Sulphur Dioxide: 0.38 μg/m3
Ozone: 62.13 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 1:05 PM
Sunset: 8:37 PM
Daylight: 15 hrs 5 mins
Moonrise: 9:16 PM
Moon Transit: 1:37 AM
Moonset: 6:27 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:07 AM - 3:37 AM
1:32 PM - 4:02 PM

Minor Periods

8:46 PM - 10:16 PM
5:57 AM - 7:27 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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