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

Current Water Temperature

33.1°F

Measurement Time: Monday, March 30, 2026, 9:15 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

35.1°F
Sunny
Sunny
27.3°F
35.1°F
68%
ENE 11 mph
15.5 mph
27.3°F
25.4°F
0 in
0%
6 mi
1016 mbar
2.1

Five Day Weather Forecast

Sunny
Mon
H: 36°F
L: 27°F
Moderate or heavy snow showers
Tue
H: 27°F
L: 21°F
Overcast
Wed
H: 27°F
L: 20°F
Moderate or heavy snow showers
Thu
H: 24°F
L: 21°F
Light snow
Fri
H: 30°F
L: 19°F

Air Quality

AQI: 1 - Good
PM2.5: 5.35 μg/m3
PM10: 7.35 μg/m3
Carbon Monoxide: 180.85 μg/m3
Nitrogen Dioxide: 2.65 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 95 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 1:03 PM
Sunset: 7:26 PM
Daylight: 12 hrs 45 mins
Moonrise: 5:03 PM
Moon Transit: 11:39 PM
Moonset: 5:44 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.0%

Best Times for Fishing or Hunting

Major Periods

10:49 AM - 1:19 PM
12:00 AM - 12:00 AM

Minor Periods

4:33 PM - 6:03 PM
5:14 AM - 6:44 AM

Action Rating: 3 out of 5

Winter Weather Advisory issued March 30 at 11:09AM CDT until March 31 at 7:00PM CDT by NWS Duluth MN

Effective: Mon March 30, 2026, 11:09 AM
Expires: Tue March 31, 2026, 1:00 AM

* WHAT...Mixed precipitation expected. Total snow accumulations up to two inches and ice accumulations around a light glaze. * WHERE...North Lake and Cook Counties. This includes the Tribal Lands of the Grand Portage Reservation. This also includes the Boundary Waters eastern and central area. * WHEN...From 1 AM to 7 PM CDT Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning and evening commutes.

Slow down and use caution while traveling. Call 511 or visit www.511mn.org for Minnesota road information.
Monday, March 30, 2026

Weather Forecast

Sunny
36°F
27°F
31.4°F
69%
0 in
0%
0%
13 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 6.89 μg/m3
PM10: 8.31 μg/m3
Carbon Monoxide: 185.21 μg/m3
Nitrogen Dioxide: 3.6 μg/m3
Sulphur Dioxide: 1.77 μg/m3
Ozone: 87.68 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 1:03 PM
Sunset: 7:26 PM
Daylight: 12 hrs 45 mins
Moonrise: 5:03 PM
Moon Transit: 11:39 PM
Moonset: 5:44 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.0%

Best Times for Fishing or Hunting

Major Periods

10:49 AM - 1:19 PM
12:00 AM - 12:00 AM

Minor Periods

4:33 PM - 6:03 PM
5:14 AM - 6:44 AM

Action Rating: 3 out of 5

Tuesday, March 31, 2026

Weather Forecast

Moderate or heavy snow showers
27°F
20.7°F
25.9°F
90%
0.06 in
67%
6%
17.9 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.26 μg/m3
PM10: 4.35 μg/m3
Carbon Monoxide: 175.05 μg/m3
Nitrogen Dioxide: 1.78 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 97.04 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 1:02 PM
Sunset: 7:27 PM
Daylight: 12 hrs 48 mins
Moonrise: 6:16 PM
Moon Transit: 12:00 AM
Moonset: 6:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:33 AM - 2:03 PM

Minor Periods

5:46 PM - 7:16 PM
5:30 AM - 7:00 AM

Action Rating: 4 out of 5

Wednesday, April 1, 2026

Weather Forecast

Overcast
26.8°F
20.1°F
23.7°F
81%
0 in
0%
0%
11 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 1.5 μg/m3
PM10: 1.77 μg/m3
Carbon Monoxide: 156.77 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 90.44 μg/m3

Astronomical

Sunrise: 6:37 AM
Sun Transit: 1:02 PM
Sunset: 7:29 PM
Daylight: 12 hrs 52 mins
Moonrise: 7:27 PM
Moon Transit: 12:22 AM
Moonset: 6:14 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:15 AM - 2:45 PM

Minor Periods

6:57 PM - 8:27 PM
5:44 AM - 7:14 AM

Action Rating: 3 out of 5

Thursday, April 2, 2026

Weather Forecast

Moderate or heavy snow showers
24.1°F
21.2°F
22.5°F
83%
0.4 in
78%
33%
17.9 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 1.82 μg/m3
PM10: 2.25 μg/m3
Carbon Monoxide: 149.64 μg/m3
Nitrogen Dioxide: 1.44 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 95 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:02 PM
Sunset: 7:30 PM
Daylight: 12 hrs 55 mins
Moonrise: 8:39 PM
Moon Transit: 1:04 AM
Moonset: 6:29 AM
Moon Phase: Full
Moon Illumination: 99.5%

Best Times for Fishing or Hunting

Major Periods

12:34 AM - 3:04 AM
12:58 AM - 3:28 PM

Minor Periods

8:09 PM - 9:39 PM
5:59 AM - 7:29 AM

Action Rating: 3 out of 5

Friday, April 3, 2026

Weather Forecast

Light snow
30.1°F
19.4°F
25.2°F
93%
0.14 in
60%
61%
15.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.96 μg/m3
PM10: 2.48 μg/m3
Carbon Monoxide: 153.72 μg/m3
Nitrogen Dioxide: 1.31 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 100.38 μg/m3

Astronomical

Sunrise: 6:33 AM
Sun Transit: 1:01 PM
Sunset: 7:32 PM
Daylight: 12 hrs 59 mins
Moonrise: 9:50 PM
Moon Transit: 1:47 AM
Moonset: 6:46 AM
Moon Phase: Full
Moon Illumination: 96.6%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
1:42 PM - 4:12 PM

Minor Periods

9:20 PM - 10:50 PM
6:16 AM - 7:46 AM

Action Rating: 4 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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