Water Temperature of Grand Marais Harbor in Grand Marais, MN
Current Water Temperature
Measurement Time: Friday, July 25, 2025, 10:18 AM CDT
Temperature Locations
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Local Points of Interest
Lake Superior; Grand Marais Campground and Marina; Grand Marais Municipal ArenaSponsored Content
Station Name: 9099090 - Grand Marais, MN
Station Type: Fixed
Data Source: National Data Buoy Center
Elevation Above Sea Level: 617 feet / 188 meters
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

Humidity: 73%
Feels Like: 76.3°F
Wind: S 4.7 mph
Wind Gusts: 7.8 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 5.3
Five Day Weather Forecast

Fri
H: 69°F
L: 61°F

Sat
H: 71°F
L: 60°F

Sun
H: 77°F
L: 63°F

Mon
H: 77°F
L: 64°F

Tue
H: 76°F
L: 58°F
Air Quality
Nitrogen Dioxide: 3.36 μg/m3
Sulphur Dioxide: 0.17 μg/m3
Ozone: 100 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:45 PM
Daylight: 15 hrs 15 mins
Moon Transit: 2:02 PM
Moonset: 9:37 PM
Moon Phase: New
Moon Illumination: 3.1%
Best Times for Fishing or Hunting
Major Periods
1:03 AM - 3:33 AM1:32 PM - 4:02 PM
Minor Periods
9:07 PM - 10:37 PM5:40 AM - 7:10 AM
Action Rating: 5 out of 5
Air Quality Alert issued July 23 at 3:35PM CDT by NWS Duluth MN
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Wed July 23, 2025, 3:35 PM
Expires: Fri July 25, 2025, 11:00 PM
* WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Red or Unhealthy category. * WHERE...North central and northeast Minnesota. * WHEN...Until 11 PM CDT Friday. * IMPACTS...Some members of the general public may experience health effects. Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, may experience health effects. * ADDITIONAL DETAILS...A band of heavy smoke from wildfires in Saskatchewan and Manitoba is moving south across northwest Minnesota on Wednesday. The smoke will remain over the northwest part of the state through the end of Wednesday, but by Thursday morning the smoke will reach southwest MN. Smoke will also move into the northeast and central portions of the state Thursday morning, and by Thursday afternoon smoke will reach east central and south central MN. Some uncertainty remains regarding how far south the ground-level smoke will reach by Friday morning, when winds are expected to become southerly and push the smoke back to the north. Air quality should improve gradually from south to north beginning Friday afternoon, with improvement in fine particle levels below the alert threshold expected by the end of Friday.
Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid prolonged or heavy exertion. The general public should limit prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors.
Air Quality Alert issued July 23 at 3:35PM CDT by NWS Duluth MN
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Wed July 23, 2025, 3:35 PM
Expires: Fri July 25, 2025, 11:00 PM
* WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Red or Unhealthy category. * WHERE...North central and northeast Minnesota. * WHEN...Until 11 PM CDT Friday. * IMPACTS...Some members of the general public may experience health effects. Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, may experience health effects. * ADDITIONAL DETAILS...A band of heavy smoke from wildfires in Saskatchewan and Manitoba is moving south across northwest Minnesota on Wednesday. The smoke will remain over the northwest part of the state through the end of Wednesday, but by Thursday morning the smoke will reach southwest MN. Smoke will also move into the northeast and central portions of the state Thursday morning, and by Thursday afternoon smoke will reach east central and south central MN. Some uncertainty remains regarding how far south the ground-level smoke will reach by Friday morning, when winds are expected to become southerly and push the smoke back to the north. Air quality should improve gradually from south to north beginning Friday afternoon, with improvement in fine particle levels below the alert threshold expected by the end of Friday.
Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid prolonged or heavy exertion. The general public should limit prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors.
Air Quality Alert issued July 23 at 3:35PM CDT by NWS Duluth MN
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Wed July 23, 2025, 3:35 PM
Expires: Fri July 25, 2025, 11:00 PM
* WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Red or Unhealthy category. * WHERE...North central and northeast Minnesota. * WHEN...Until 11 PM CDT Friday. * IMPACTS...Some members of the general public may experience health effects. Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, may experience health effects. * ADDITIONAL DETAILS...A band of heavy smoke from wildfires in Saskatchewan and Manitoba is moving south across northwest Minnesota on Wednesday. The smoke will remain over the northwest part of the state through the end of Wednesday, but by Thursday morning the smoke will reach southwest MN. Smoke will also move into the northeast and central portions of the state Thursday morning, and by Thursday afternoon smoke will reach east central and south central MN. Some uncertainty remains regarding how far south the ground-level smoke will reach by Friday morning, when winds are expected to become southerly and push the smoke back to the north. Air quality should improve gradually from south to north beginning Friday afternoon, with improvement in fine particle levels below the alert threshold expected by the end of Friday.
Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid prolonged or heavy exertion. The general public should limit prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors.
Air Quality Alert issued July 23 at 3:35PM CDT by NWS Duluth MN
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Wed July 23, 2025, 3:35 PM
Expires: Fri July 25, 2025, 11:00 PM
* WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Red or Unhealthy category. * WHERE...North central and northeast Minnesota. * WHEN...Until 11 PM CDT Friday. * IMPACTS...Some members of the general public may experience health effects. Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, may experience health effects. * ADDITIONAL DETAILS...A band of heavy smoke from wildfires in Saskatchewan and Manitoba is moving south across northwest Minnesota on Wednesday. The smoke will remain over the northwest part of the state through the end of Wednesday, but by Thursday morning the smoke will reach southwest MN. Smoke will also move into the northeast and central portions of the state Thursday morning, and by Thursday afternoon smoke will reach east central and south central MN. Some uncertainty remains regarding how far south the ground-level smoke will reach by Friday morning, when winds are expected to become southerly and push the smoke back to the north. Air quality should improve gradually from south to north beginning Friday afternoon, with improvement in fine particle levels below the alert threshold expected by the end of Friday.
Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid prolonged or heavy exertion. The general public should limit prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors.
Weather Forecast
Average Temperature: 65.2°F
Average Humidity: 84%
Wind: 6.5 mph
UV Index: 1.6
Air Quality
Nitrogen Dioxide: 3.55 μg/m3
Sulphur Dioxide: 0.21 μg/m3
Ozone: 77.04 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:45 PM
Daylight: 15 hrs 15 mins
Moon Transit: 2:02 PM
Moonset: 9:37 PM
Moon Phase: New
Moon Illumination: 3.1%
Best Times for Fishing or Hunting
Major Periods
1:03 AM - 3:33 AM1:32 PM - 4:02 PM
Minor Periods
9:07 PM - 10:37 PM5:40 AM - 7:10 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 64.6°F
Average Humidity: 96%
Wind: 16.1 mph
UV Index: 2.2
Air Quality
Nitrogen Dioxide: 3.03 μg/m3
Sulphur Dioxide: 0.48 μg/m3
Ozone: 98.72 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:44 PM
Daylight: 15 hrs 13 mins
Moon Transit: 2:50 PM
Moonset: 9:55 PM
Moon Phase: New
Moon Illumination: 0.7%
Best Times for Fishing or Hunting
Major Periods
1:54 AM - 4:24 AM2:20 PM - 4:50 PM
Minor Periods
9:25 PM - 10:55 PM6:59 AM - 8:29 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 69.5°F
Average Humidity: 92%
Wind: 27.3 mph
UV Index: 1.4
Air Quality
Nitrogen Dioxide: 4.14 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 82 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:43 PM
Daylight: 15 hrs 10 mins
Moon Transit: 3:35 PM
Moonset: 10:11 PM
Moon Phase: New
Moon Illumination: 3.8%
Best Times for Fishing or Hunting
Major Periods
2:40 AM - 5:10 AM3:05 PM - 5:35 PM
Minor Periods
9:41 PM - 11:11 PM8:14 AM - 9:44 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 69.6°F
Average Humidity: 84%
Wind: 8.9 mph
UV Index: 1.9
Air Quality
Nitrogen Dioxide: 2.31 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 95.36 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:41 PM
Daylight: 15 hrs 8 mins
Moon Transit: 4:17 PM
Moonset: 10:25 PM
Moon Phase: Waxing Crescent
Moon Illumination: 9.3%
Best Times for Fishing or Hunting
Major Periods
3:23 AM - 5:53 AM3:47 PM - 6:17 PM
Minor Periods
9:55 PM - 11:25 PM9:25 AM - 10:55 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 67°F
Average Humidity: 61%
Wind: 10.7 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 2.08 μg/m3
Sulphur Dioxide: 0.36 μg/m3
Ozone: 71.85 μg/m3
Astronomical
Sun Transit: 1:07 PM
Sunset: 8:40 PM
Daylight: 15 hrs 5 mins
Moon Transit: 4:57 PM
Moonset: 10:39 PM
Moon Phase: Waxing Crescent
Moon Illumination: 16.9%
Best Times for Fishing or Hunting
Major Periods
4:04 AM - 6:34 AM4:27 PM - 6:57 PM
Minor Periods
10:09 PM - 11:39 PM10:34 AM - 12:04 AM
Action Rating: 2 out of 5