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

Current Water Temperature

32.0°F

Measurement Time: Thursday, July 23, 2026, 7:55 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

77.9°F
Sunny
Sunny
67.5°F
78.8°F
46%
WSW 12.5 mph
18 mph
77.9°F
55.3°F
0 in
0%
6 mi
1016 mbar
6.6

Five Day Weather Forecast

Sunny
Thu
H: 80°F
L: 60°F
Sunny
Fri
H: 72°F
L: 61°F
Patchy rain nearby
Sat
H: 81°F
L: 62°F
Sunny
Sun
H: 71°F
L: 59°F
Sunny
Mon
H: 69°F
L: 58°F

Air Quality

AQI: 1 - Good
PM2.5: 14.4 μg/m3
PM10: 14.7 μg/m3
Carbon Monoxide: 187 μg/m3
Nitrogen Dioxide: 0.7 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 91 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 1:05 PM
Sunset: 8:46 PM
Daylight: 15 hrs 22 mins
Moonrise: 4:36 PM
Moon Transit: 8:38 PM
Moonset: 12:08 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

7:47 AM - 10:17 AM
8:08 PM - 10:38 PM

Minor Periods

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

Action Rating: 2 out of 5

Small Craft Advisory issued July 23 at 1:51AM CDT until July 23 at 10:00PM CDT by NWS Duluth MN

Effective: Thu July 23, 2026, 1:51 AM
Expires: Thu July 23, 2026, 2:00 PM

* WHAT...Southwest winds 10 to 20 kt with gusts to 25 kt and waves 3 to 5 ft expected. * WHERE...Grand Portage to Grand Marais MN and Grand Marais to Taconite Harbor MN. * WHEN...From 10 AM this morning to 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.
Thursday, July 23, 2026

Weather Forecast

Sunny
79.5°F
60.1°F
69.9°F
53%
0 in
2%
0%
13.9 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 12.49 μg/m3
PM10: 12.75 μg/m3
Carbon Monoxide: 163.13 μg/m3
Nitrogen Dioxide: 0.77 μg/m3
Sulphur Dioxide: 0.34 μg/m3
Ozone: 84.42 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 1:05 PM
Sunset: 8:46 PM
Daylight: 15 hrs 22 mins
Moonrise: 4:36 PM
Moon Transit: 8:38 PM
Moonset: 12:08 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

7:47 AM - 10:17 AM
8:08 PM - 10:38 PM

Minor Periods

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

Action Rating: 2 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
71.8°F
61.4°F
67.4°F
66%
0 in
6%
0%
13.2 mph
6.8


Air Quality

AQI: 1 - Good
PM2.5: 6.16 μg/m3
PM10: 6.28 μg/m3
Carbon Monoxide: 147.25 μg/m3
Nitrogen Dioxide: 1.13 μg/m3
Sulphur Dioxide: 0.34 μg/m3
Ozone: 93.96 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:05 PM
Sunset: 8:45 PM
Daylight: 15 hrs 20 mins
Moonrise: 5:40 PM
Moon Transit: 9:28 PM
Moonset: 12:37 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

8:36 AM - 11:06 AM
8:58 PM - 11:28 PM

Minor Periods

5:10 PM - 6:40 PM
12:07 AM - 1:37 AM

Action Rating: 3 out of 5

Saturday, July 25, 2026

Weather Forecast

Patchy rain nearby
81.1°F
61.8°F
69.3°F
79%
0.2 in
75%
0%
15 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.16 μg/m3
PM10: 4.27 μg/m3
Carbon Monoxide: 126.83 μg/m3
Nitrogen Dioxide: 1.46 μg/m3
Sulphur Dioxide: 0.25 μg/m3
Ozone: 89.21 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 1:05 PM
Sunset: 8:44 PM
Daylight: 15 hrs 17 mins
Moonrise: 6:39 PM
Moon Transit: 10:20 PM
Moonset: 1:14 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

9:26 AM - 11:56 AM
12:00 AM - 12:00 AM

Minor Periods

6:09 PM - 7:39 PM
12:44 AM - 2:14 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
70.7°F
59°F
63.8°F
80%
0 in
21%
0%
6.7 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 4.75 μg/m3
PM10: 4.9 μg/m3
Carbon Monoxide: 142.05 μg/m3
Nitrogen Dioxide: 1 μg/m3
Sulphur Dioxide: 0.36 μg/m3
Ozone: 83.92 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
68.7°F
58°F
63.2°F
71%
0 in
7%
0%
8.1 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 4.53 μg/m3
PM10: 4.66 μg/m3
Carbon Monoxide: 188.75 μg/m3
Nitrogen Dioxide: 1.05 μg/m3
Sulphur Dioxide: 0.36 μg/m3
Ozone: 95.5 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

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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