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

Current Water Temperature

32.9°F

Measurement Time: Friday, March 6, 2026, 7:15 AM CST

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

34.5°F
Fog
Fog
32.9°F
34.5°F
100%
E 2.2 mph
6.7 mph
32.9°F
34.2°F
0 in
100%
5 mi
1013 mbar
1

Five Day Weather Forecast

Fog
Fri
H: 36°F
L: 18°F
Moderate or heavy snow showers
Sat
H: 39°F
L: 25°F
Moderate rain
Sun
H: 40°F
L: 28°F
Moderate or heavy snow showers
Mon
H: 37°F
L: 21°F
Light freezing rain
Tue
H: 18°F
L: 15°F

Air Quality

AQI: 1 - Good
PM2.5: 7.25 μg/m3
PM10: 7.55 μg/m3
Carbon Monoxide: 236.85 μg/m3
Nitrogen Dioxide: 9.75 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 52 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 12:09 AM
Sunset: 5:51 PM
Daylight: 11 hrs 21 mins
Moonrise: 9:56 PM
Moon Transit: 2:09 AM
Moonset: 7:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.6%

Best Times for Fishing or Hunting

Major Periods

1:39 AM - 4:09 AM
2:04 PM - 4:34 PM

Minor Periods

9:26 PM - 10:56 PM
6:53 AM - 8:23 AM

Action Rating: 3 out of 5

yellow advisory - freezing drizzle - 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 5, 2026, 5:26 PM
Expires: Fri March 6, 2026, 9:26 AM

Areas of freezing drizzle are expected. What: Freezing drizzle resulting in icy and slippery conditions. When: Beginning overnight or early Friday morning and ending Friday afternoon or evening. ### Roads, walkways, and other surfaces will likely become icy and slippery. There is risk of injury due to slips and falls. 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.

Be very careful if walking or driving.


yellow advisory - freezing drizzle - 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 5, 2026, 10:09 PM
Expires: Fri March 6, 2026, 2:09 PM

Areas of freezing drizzle are expected. What: Freezing drizzle resulting in icy and slippery conditions. When: Beginning overnight or early Friday morning and ending Friday afternoon or evening. ### Roads, walkways, and other surfaces will likely become icy and slippery. There is risk of injury due to slips and falls. 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.

Be very careful if walking or driving.


yellow advisory - freezing drizzle - 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: Fri March 6, 2026, 3:16 AM
Expires: Fri March 6, 2026, 7:16 PM

Areas of freezing drizzle are expected. What: Freezing drizzle resulting in icy and slippery conditions. When: Beginning early this morning and ending this afternoon or evening. Discussion: Patchy freezing drizzle is expected to develop this morning, particularly for areas closer to the eastern and northern shores of Lake Superior. The threat of freezing drizzle will end later today as temperatures rise above the freezing mark. ### Roads, walkways, and other surfaces will likely become icy and slippery. There is risk of injury due to slips and falls. 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.

Be very careful if walking or driving.


Winter Weather Advisory issued March 6 at 1:15AM CST until March 6 at 9:00AM CST by NWS Duluth MN

Effective: Fri March 6, 2026, 1:15 AM
Expires: Fri March 6, 2026, 9:00 AM

* WHAT...Freezing drizzle. Additional ice accumulations around a light glaze. * WHERE...Carlton and South St. Louis, Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Fond du Lac Band and the Grand Portage Reservation. * WHEN...Until 9 AM CST this morning. * IMPACTS...Roads, and especially bridges and overpasses, will likely be slick and hazardous. Conditions will be worst on untreated surfaces. Very slippery sidewalks, roads and bridges are possible. The hazardous conditions will impact the morning commute.

Slow down and use caution while traveling. Prepare for possible power outages. Call 511 or visit www.511mn.org for Minnesota road information.


Dense Fog Advisory issued March 6 at 1:11AM CST until March 6 at 12:00PM CST by NWS Duluth MN

Effective: Fri March 6, 2026, 1:11 AM
Expires: Fri March 6, 2026, 12:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Carlton and South St. Louis, Southern Cook and Southern Lake Counties. In Wisconsin, Bayfield and Douglas Counties. This includes the Tribal Lands of the Fond du Lac Band, the Grand Portage Reservation and the Red Cliff Band. Other locations including the Apostle Islands National Lakeshore. * WHEN...Until noon CST today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...The worst conditions with the poorest visibilities are being reported closer to Lake Superior.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.


Friday, March 6, 2026

Weather Forecast

Fog
36.3°F
17.6°F
28.5°F
95%
0.1 in
86%
9%
5.1 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 4.19 μg/m3
PM10: 4.61 μg/m3
Carbon Monoxide: 202.05 μg/m3
Nitrogen Dioxide: 3 μg/m3
Sulphur Dioxide: 1.58 μg/m3
Ozone: 76.6 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 12:09 AM
Sunset: 5:51 PM
Daylight: 11 hrs 21 mins
Moonrise: 9:56 PM
Moon Transit: 2:09 AM
Moonset: 7:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.6%

Best Times for Fishing or Hunting

Major Periods

1:39 AM - 4:09 AM
2:04 PM - 4:34 PM

Minor Periods

9:26 PM - 10:56 PM
6:53 AM - 8:23 AM

Action Rating: 3 out of 5

Saturday, March 7, 2026

Weather Forecast

Moderate or heavy snow showers
38.7°F
24.8°F
30.8°F
84%
0.37 in
83%
11%
11.2 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 3.16 μg/m3
PM10: 3.29 μg/m3
Carbon Monoxide: 191.65 μg/m3
Nitrogen Dioxide: 3.9 μg/m3
Sulphur Dioxide: 1.54 μg/m3
Ozone: 74.36 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 12:00 AM
Sunset: 5:52 PM
Daylight: 11 hrs 24 mins
Moonrise: 11:07 PM
Moon Transit: 2:53 AM
Moonset: 7:40 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.2%

Best Times for Fishing or Hunting

Major Periods

2:23 AM - 4:53 AM
2:48 PM - 5:18 PM

Minor Periods

12:00 AM - 12:00 AM
7:10 AM - 8:40 AM

Action Rating: 2 out of 5

Sunday, March 8, 2026

Weather Forecast

Moderate rain
40.3°F
27.9°F
35.1°F
90%
0.22 in
88%
0%
15.9 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.35 μg/m3
PM10: 2.82 μg/m3
Carbon Monoxide: 153.61 μg/m3
Nitrogen Dioxide: 2.02 μg/m3
Sulphur Dioxide: 1.26 μg/m3
Ozone: 86.96 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 12:00 AM
Sunset: 5:54 PM
Daylight: 11 hrs 28 mins
Moonrise: 12:07 AM
Moon Transit: 3:38 AM
Moonset: 8:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 69.3%

Best Times for Fishing or Hunting

Major Periods

3:08 AM - 5:38 AM
3:34 PM - 6:04 PM

Minor Periods

7:31 AM - 9:01 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, March 9, 2026

Weather Forecast

Moderate or heavy snow showers
37.4°F
20.8°F
32.4°F
76%
0.07 in
84%
10%
19 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.46 μg/m3
PM10: 2.98 μg/m3
Carbon Monoxide: 146.95 μg/m3
Nitrogen Dioxide: 1.79 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 89 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:00 AM
Sunset: 5:55 PM
Daylight: 11 hrs 32 mins
Moonrise: 12:18 AM
Moon Transit: 4:25 AM
Moonset: 8:27 AM
Moon Phase: Waning Gibbous
Moon Illumination: 58.5%

Best Times for Fishing or Hunting

Major Periods

3:55 AM - 6:25 AM
4:22 PM - 6:52 PM

Minor Periods

7:57 AM - 9:27 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, March 10, 2026

Weather Forecast

Light freezing rain
18.2°F
14.9°F
17.2°F
84%
0.01 in
85%
46%
9.2 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 1.57 μg/m3
PM10: 1.73 μg/m3
Carbon Monoxide: 174.64 μg/m3
Nitrogen Dioxide: 1.89 μg/m3
Sulphur Dioxide: 1.5 μg/m3
Ozone: 82.17 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 12:00 AM
Sunset: 5:57 PM
Daylight: 11 hrs 35 mins
Moonrise: 1:24 AM
Moon Transit: 5:14 AM
Moonset: 9:01 AM
Moon Phase: Last Quarter
Moon Illumination: 47.2%

Best Times for Fishing or Hunting

Major Periods

4:44 AM - 7:14 AM
5:12 PM - 7:42 PM

Minor Periods

8:31 AM - 10:01 AM
12:54 AM - 2:24 AM

Action Rating: 2 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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