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

Current Water Temperature

32.9°F

Measurement Time: Thursday, March 19, 2026, 12:15 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

29.8°F
Sunny
Sunny
20.9°F
29.8°F
89%
SE 6 mph
8.9 mph
20.9°F
26.5°F
0 in
16%
1 mi
1018 mbar
0.5

Five Day Weather Forecast

Moderate snow
Thu
H: 31°F
L: 17°F
Partly Cloudy
Fri
H: 35°F
L: 27°F
Cloudy
Sat
H: 33°F
L: 29°F
Moderate or heavy snow showers
Sun
H: 32°F
L: 22°F
Light snow
Mon
H: 30°F
L: 15°F

Air Quality

AQI: 1 - Good
PM2.5: 1.85 μg/m3
PM10: 2.05 μg/m3
Carbon Monoxide: 199.85 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 96 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:00 AM
Sunset: 7:10 PM
Daylight: 12 hrs 7 mins
Moonrise: 7:07 AM
Moon Transit: 12:31 AM
Moonset: 8:24 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 AM
12:01 AM - 2:31 AM

Minor Periods

7:54 PM - 9:24 PM
6:37 AM - 8:07 AM

Action Rating: 4 out of 5

special weather statement in effect

Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Thu March 19, 2026, 2:58 PM
Expires: Fri March 20, 2026, 3:03 AM

A few hours of heavy snow are expected. What: Snowfall amounts near 10 cm are expected. Peak snowfall rates of 4 cm an hour. Reduced visibility due to heavy snow. When: Tonight. Additional information: Roads and walkways may be difficult to navigate due to accumulating snow. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.


Thursday, March 19, 2026

Weather Forecast

Moderate snow
30.9°F
16.9°F
25°F
81%
0.05 in
78%
15%
7.4 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 4.65 μg/m3
PM10: 5.05 μg/m3
Carbon Monoxide: 195.57 μg/m3
Nitrogen Dioxide: 2.17 μg/m3
Sulphur Dioxide: 1.51 μg/m3
Ozone: 94.76 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:00 AM
Sunset: 7:10 PM
Daylight: 12 hrs 7 mins
Moonrise: 7:07 AM
Moon Transit: 12:31 AM
Moonset: 8:24 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 AM
12:01 AM - 2:31 AM

Minor Periods

7:54 PM - 9:24 PM
6:37 AM - 8:07 AM

Action Rating: 4 out of 5

Friday, March 20, 2026

Weather Forecast

Partly Cloudy
35.4°F
27.3°F
31.5°F
89%
0 in
0%
8%
9.6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 2.71 μg/m3
PM10: 2.97 μg/m3
Carbon Monoxide: 177.13 μg/m3
Nitrogen Dioxide: 1.91 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 96.32 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 9:27 AM
Sunset: 7:12 PM
Daylight: 12 hrs 10 mins
Moonrise: 7:24 AM
Moon Transit: 2:26 PM
Moonset: 9:46 PM
Moon Phase: New
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

1:33 AM - 4:03 AM
1:56 PM - 4:26 PM

Minor Periods

9:16 PM - 10:46 PM
6:54 AM - 8:24 AM

Action Rating: 4 out of 5

Saturday, March 21, 2026

Weather Forecast

Cloudy
32.5°F
28.9°F
31.2°F
90%
0 in
0%
0%
12.3 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 1.85 μg/m3
PM10: 2.17 μg/m3
Carbon Monoxide: 162.69 μg/m3
Nitrogen Dioxide: 1.39 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 95.84 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:00 AM
Sunset: 7:13 PM
Daylight: 12 hrs 14 mins
Moonrise: 7:45 AM
Moon Transit: 3:18 PM
Moonset: 11:12 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

2:24 AM - 4:54 AM
2:48 PM - 5:18 PM

Minor Periods

12:00 AM - 12:00 AM
7:15 AM - 8:45 AM

Action Rating: 3 out of 5

Sunday, March 22, 2026

Weather Forecast

Moderate or heavy snow showers
32°F
22°F
28.2°F
83%
0.28 in
61%
38%
15.4 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 1.13 μg/m3
PM10: 1.13 μg/m3
Carbon Monoxide: 181.46 μg/m3
Nitrogen Dioxide: 1.61 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 93.6 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 1:05 PM
Sunset: 7:14 PM
Daylight: 12 hrs 17 mins
Moonrise: 8:11 AM
Moon Transit: 4:15 PM
Moonset: 12:12 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
3:45 PM - 6:15 PM

Minor Periods

7:41 AM - 9:11 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, March 23, 2026

Weather Forecast

Light snow
29.8°F
15.4°F
23.3°F
93%
0.02 in
63%
47%
6.9 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 1.24 μg/m3
PM10: 1.28 μg/m3
Carbon Monoxide: 189.67 μg/m3
Nitrogen Dioxide: 1.65 μg/m3
Sulphur Dioxide: 1.38 μg/m3
Ozone: 89.46 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 1:05 PM
Sunset: 7:16 PM
Daylight: 12 hrs 21 mins
Moonrise: 8:46 AM
Moon Transit: 5:15 PM
Moonset: 12:38 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
4:45 PM - 7:15 PM

Minor Periods

8:16 AM - 9:46 AM
12:08 AM - 1:38 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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