Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

50.5°F

Measurement Time: Friday, November 28, 2025, 2:18 AM CST

Temperature Locations

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Local Points of Interest

Lake Superior; Grand Marais Campground and Marina; Grand Marais Municipal Arena

Grand Marais Harbor

Station Name: 9099090 - Grand Marais, MN
Station Type: Fixed
Data Source: National Data Buoy Center

Elevation Above Sea Level: 617 feet

Nearest Address:
391 MN-61
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.749, -90.341

Nearby Water Temperatures

Lake Superior, Grand Marais, MN (0.6 mi)
Poplar River, Lutsen, MN (18.8 mi)
Grand Portage River, Grand Portage, MN (33.9 mi)
Lake Superior, Lake Superior, MI (38.4 mi)
Baptism River, Illgen City, MN (49.1 mi)
Kawishiwi River, Ely, MN (56.7 mi)
Washington Creek, Windigo, MI (56.7 mi)
Dunka River, Babbitt, MN (70.8 mi)
Dunka River, Babbitt, MN (71.1 mi)
Partrige River, Babbitt, MN (74.2 mi)
Lake Superior, Two Harbors, MN (79.9 mi)
Saint Louis River, Hoyt Lakes, MN (81.3 mi)
Chequamegon Bay, Ashland, WI (81.3 mi)
Presque Isle River, Tula, MI (87.2 mi)
Lake Superior, Calumet, MI (87.4 mi)

Weather for Grand Marais, Minnesota

Current Weather

28.9°F
Blowing snow
Blowing snow
15.2°F
30.4°F
85%
ENE 22.6 mph
29.9 mph
15.7°F
28.4°F
0.05 in
0%
0 mi
1000 mbar
0

Five Day Weather Forecast

Blowing snow
Wed
H: 30°F
L: 29°F
Moderate or heavy snow showers
Thu
H: 26°F
L: 20°F
Cloudy
Fri
H: 29°F
L: 17°F
Light freezing rain
Sat
H: 24°F
L: 14°F
Overcast
Sun
H: 24°F
L: 13°F

Air Quality

AQI: 1 - Good
PM2.5: 0.88 μg/m3
PM10: 0.88 μg/m3
Carbon Monoxide: 171.68 μg/m3
Nitrogen Dioxide: 0.98 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 83 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:15 AM
Sunset: 5:29 PM
Daylight: 10 hrs 27 mins
Moonrise: 7:33 AM
Moon Transit: 1:14 PM
Moonset: 7:10 PM
Moon Phase: New
Moon Illumination: 1.3%

Best Times for Fishing or Hunting

Major Periods

12:18 AM - 2:48 AM
12:44 AM - 3:14 PM

Minor Periods

6:40 PM - 8:10 PM
7:03 AM - 8:33 AM

Action Rating: 4 out of 5

Winter Storm Warning issued February 18 at 11:28AM CST until February 19 at 12:00PM CST by NWS Duluth MN

Effective: Wed February 18, 2026, 11:28 AM
Expires: Wed February 18, 2026, 11:30 PM

* WHAT...Heavy snow. Additional snow accumulations between 1 and 3 inches except between 3 and 8 inches for the higher terrain of the North Shore. Winds gusting as high as 50 mph. * WHERE...Northern Cook and Lake County. This also includes the Boundary Waters eastern and central area. * WHEN...Until noon CST Thursday. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 511 or visit www.511mn.org for Minnesota road information.


Blizzard Warning issued February 18 at 11:28AM CST until February 19 at 12:00PM CST by NWS Duluth MN

Effective: Wed February 18, 2026, 11:28 AM
Expires: Wed February 18, 2026, 11:30 PM

* WHAT...Blizzard conditions. Additional snow accumulations between 1 and 4 inches around the Twin Ports and up to 5 to 10 inches along the higher terrain of the North Shore. Ice accumulations around a light glaze. Winds gusting as high as 50 mph. * WHERE...Carlton and South St. Louis, Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation and the Fond du Lac Band. * WHEN...Until noon CST Thursday. * IMPACTS...The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages. Whiteout conditions are expected and will make travel treacherous and potentially life-threatening, especially along Highway 61 on the North Shore.

Travel should be restricted to emergencies only. If you must travel, have a winter survival kit with you. If you get stranded, stay with your vehicle. Call 511 or visit www.511mn.org for Minnesota road information. Do not travel unless you must due to emergencies only. If you must travel, especially along Highway 61 on the North Shore, have a winter survival kit with you. If you get stranded, stay with your vehicle.


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: Wed February 18, 2026, 10:05 AM
Expires: Thu February 19, 2026, 1:03 AM

Hazardous winter conditions continue. What: Snowfall amounts of 10 to 15 cm. Reduced visibility in blowing snow with winds gusting up to 70 km/h. When: Continuing into tonight. Additional information: Snow and blowing snow associated with a low pressure system will continue. Winds gusting up to 70 km/h are most likely along the Minnesota border. Roads and walkways may be difficult to navigate. Visibility may be suddenly reduced to near zero at times. Road closures are possible. Allow extra time for travel. ### 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.


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: Wed February 18, 2026, 6:56 AM
Expires: Wed February 18, 2026, 10:56 PM

Hazardous winter conditions tonight into Wednesday. What: Snowfall amounts of 10 to 15 cm. Reduced visibility in blowing snow with winds gusting up to 80 km/h. When: Continuing through Wednesday. Additional information: Snow and local blowing snow associated with an approaching system will develop tonight. Winds gusting up to 80 km/h are most likely along the Minnesota border. Roads and walkways may be difficult to navigate. Visibility may be suddenly reduced to near zero at times. Road closures are possible. Allow extra time for travel. ### 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.


Wednesday, February 18, 2026

Weather Forecast

Blowing snow
30.4°F
28.8°F
30.2°F
89%
1.86 in
69%
85%
30 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 0.92 μg/m3
PM10: 0.99 μg/m3
Carbon Monoxide: 170.12 μg/m3
Nitrogen Dioxide: 0.93 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 81.64 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:15 AM
Sunset: 5:29 PM
Daylight: 10 hrs 27 mins
Moonrise: 7:33 AM
Moon Transit: 1:14 PM
Moonset: 7:10 PM
Moon Phase: New
Moon Illumination: 1.3%

Best Times for Fishing or Hunting

Major Periods

12:18 AM - 2:48 AM
12:44 AM - 3:14 PM

Minor Periods

6:40 PM - 8:10 PM
7:03 AM - 8:33 AM

Action Rating: 4 out of 5

Thursday, February 19, 2026

Weather Forecast

Moderate or heavy snow showers
25.5°F
20.1°F
25.4°F
86%
0.4 in
62%
33%
20.1 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 1.09 μg/m3
PM10: 1.1 μg/m3
Carbon Monoxide: 170.6 μg/m3
Nitrogen Dioxide: 1.5 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 77.8 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 12:15 AM
Sunset: 5:31 PM
Daylight: 10 hrs 30 mins
Moonrise: 7:48 AM
Moon Transit: 2:00 PM
Moonset: 8:27 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

1:04 AM - 3:34 AM
1:30 PM - 4:00 PM

Minor Periods

7:57 PM - 9:27 PM
7:18 AM - 8:48 AM

Action Rating: 3 out of 5

Friday, February 20, 2026

Weather Forecast

Cloudy
29.3°F
17.2°F
23.2°F
77%
0 in
0%
0%
11.4 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 1.75 μg/m3
PM10: 1.88 μg/m3
Carbon Monoxide: 169.4 μg/m3
Nitrogen Dioxide: 1.76 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 81.04 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:15 AM
Sunset: 5:32 PM
Daylight: 10 hrs 34 mins
Moonrise: 8:05 AM
Moon Transit: 2:46 PM
Moonset: 9:46 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

1:50 AM - 4:20 AM
2:16 PM - 4:46 PM

Minor Periods

9:16 PM - 10:46 PM
7:35 AM - 9:05 AM

Action Rating: 2 out of 5

Saturday, February 21, 2026

Weather Forecast

Light freezing rain
24.1°F
13.6°F
18°F
75%
0.01 in
83%
10%
6.9 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 1.22 μg/m3
PM10: 1.44 μg/m3
Carbon Monoxide: 153.53 μg/m3
Nitrogen Dioxide: 1.24 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 83.52 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:14 AM
Sunset: 5:34 PM
Daylight: 10 hrs 37 mins
Moonrise: 8:23 AM
Moon Transit: 3:35 PM
Moonset: 11:07 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.4%

Best Times for Fishing or Hunting

Major Periods

2:37 AM - 5:07 AM
3:05 PM - 5:35 PM

Minor Periods

12:00 AM - 12:00 AM
7:53 AM - 9:23 AM

Action Rating: 3 out of 5

Sunday, February 22, 2026

Weather Forecast

Overcast
24.1°F
13°F
17.4°F
82%
0 in
0%
12%
11.4 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 1.13 μg/m3
PM10: 1.42 μg/m3
Carbon Monoxide: 151.54 μg/m3
Nitrogen Dioxide: 0.99 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 86.31 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:14 AM
Sunset: 5:35 PM
Daylight: 10 hrs 40 mins
Moonrise: 8:44 AM
Moon Transit: 4:28 PM
Moonset: 12:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 29.1%

Best Times for Fishing or Hunting

Major Periods

3:28 AM - 5:58 AM
3:58 PM - 6:28 PM

Minor Periods

8:14 AM - 9:44 AM
12:00 AM - 12:00 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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