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

Current Water Temperature

32.0°F

Measurement Time: Friday, July 10, 2026, 10:33 PM 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

69.6°F
Clear
Clear
61.3°F
69.6°F
61%
WSW 2.2 mph
4.2 mph
69.6°F
55.6°F
0 in
0%
6 mi
1016 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 87°F
L: 65°F
Sunny
Sun
H: 84°F
L: 66°F
Sunny
Mon
H: 94°F
L: 73°F
Sunny
Tue
H: 93°F
L: 74°F
Sunny
Wed
H: 75°F
L: 65°F

Air Quality

AQI: 1 - Good
PM2.5: 3.7 μg/m3
PM10: 4 μg/m3
Carbon Monoxide: 120 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 72 μg/m3

Astronomical

Sunrise: 5:11 AM
Sun Transit: 1:04 PM
Sunset: 8:57 PM
Daylight: 15 hrs 46 mins
Moonrise: 1:38 AM
Moon Transit: 10:11 AM
Moonset: 6:55 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:41 AM - 12:11 AM

Minor Periods

6:25 PM - 7:55 PM
1:08 AM - 2:38 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued July 10 at 9:53PM CDT until July 11 at 10:00AM CDT by NWS Duluth MN

Effective: Fri July 10, 2026, 9:53 PM
Expires: Sat July 11, 2026, 10:00 AM

* WHAT...Dense fog will reduce visibility to less than 1 NM. * WHERE...Grand Portage to Grand Marais MN, Grand Marais to Taconite Harbor MN, Taconite Harbor to Silver Bay Harbor MN and Silver Bay Harbor to Two Harbors MN. * WHEN...Until 10 AM CDT Saturday. * IMPACTS...Low visibility will make navigation difficult.

If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.
Saturday, July 11, 2026

Weather Forecast

Sunny
86.5°F
65.1°F
71.6°F
67%
0.01 in
36%
0%
8.1 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 3.71 μg/m3
PM10: 4.21 μg/m3
Carbon Monoxide: 122.04 μg/m3
Nitrogen Dioxide: 1.86 μg/m3
Sulphur Dioxide: 0.57 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 5:11 AM
Sun Transit: 1:04 PM
Sunset: 8:57 PM
Daylight: 15 hrs 46 mins
Moonrise: 1:38 AM
Moon Transit: 10:11 AM
Moonset: 6:55 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:41 AM - 12:11 AM

Minor Periods

6:25 PM - 7:55 PM
1:08 AM - 2:38 AM

Action Rating: 2 out of 5

Sunday, July 12, 2026

Weather Forecast

Sunny
83.9°F
66.1°F
75.6°F
70%
0 in
7%
0%
14.3 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 5.58 μg/m3
PM10: 6.13 μg/m3
Carbon Monoxide: 119.25 μg/m3
Nitrogen Dioxide: 0.91 μg/m3
Sulphur Dioxide: 0.38 μg/m3
Ozone: 101.79 μg/m3

Astronomical

Sunrise: 5:12 AM
Sun Transit: 1:04 PM
Sunset: 8:56 PM
Daylight: 15 hrs 44 mins
Moonrise: 2:32 AM
Moon Transit: 11:17 AM
Moonset: 8:04 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:47 AM - 1:17 PM

Minor Periods

7:34 PM - 9:04 PM
2:02 AM - 3:32 AM

Action Rating: 3 out of 5

Monday, July 13, 2026

Weather Forecast

Sunny
93.8°F
73°F
83°F
56%
0 in
3%
0%
13.2 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 4.58 μg/m3
PM10: 4.95 μg/m3
Carbon Monoxide: 118.04 μg/m3
Nitrogen Dioxide: 0.64 μg/m3
Sulphur Dioxide: 0.42 μg/m3
Ozone: 103.21 μg/m3

Astronomical

Sunrise: 5:13 AM
Sun Transit: 1:04 PM
Sunset: 8:55 PM
Daylight: 15 hrs 42 mins
Moonrise: 3:42 AM
Moon Transit: 12:24 AM
Moonset: 8:56 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:54 AM - 2:24 PM

Minor Periods

8:26 PM - 9:56 PM
3:12 AM - 4:42 AM

Action Rating: 4 out of 5

Tuesday, July 14, 2026

Weather Forecast

Sunny
92.7°F
73.9°F
82.9°F
53%
0 in
2%
0%
12.8 mph
9.1


Air Quality

AQI: 1 - Good
PM2.5: 3.14 μg/m3
PM10: 3.29 μg/m3
Carbon Monoxide: 124.88 μg/m3
Nitrogen Dioxide: 0.87 μg/m3
Sulphur Dioxide: 0.35 μg/m3
Ozone: 103 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 1:04 PM
Sunset: 8:55 PM
Daylight: 15 hrs 41 mins
Moonrise: 5:05 AM
Moon Transit: 1:28 PM
Moonset: 9:33 PM
Moon Phase: New
Moon Illumination: 1.9%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
12:58 AM - 3:28 PM

Minor Periods

9:03 PM - 10:33 PM
4:35 AM - 6:05 AM

Action Rating: 4 out of 5

Wednesday, July 15, 2026

Weather Forecast

Sunny
75.4°F
64.8°F
70.2°F
50%
0 in
3%
0%
7.4 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 2.39 μg/m3
PM10: 2.43 μg/m3
Carbon Monoxide: 170.88 μg/m3
Nitrogen Dioxide: 0.99 μg/m3
Sulphur Dioxide: 0.53 μg/m3
Ozone: 76.5 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 1:04 PM
Sunset: 8:54 PM
Daylight: 15 hrs 39 mins
Moonrise: 6:34 AM
Moon Transit: 2:26 PM
Moonset: 10:01 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

1:31 AM - 4:01 AM
1:56 PM - 4:26 PM

Minor Periods

9:31 PM - 11:01 PM
6:04 AM - 7:34 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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