Water Temperature of Grand Marais Harbor in Grand Marais, MN
Current Water Temperature
Measurement Time: Wednesday, April 29, 2026, 2:18 AM CDT
Temperature Locations
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Local Points of Interest
Lake Superior; Grand Marais Campground and Marina; Grand Marais Municipal ArenaStation 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

Five Day Weather Forecast

Wed
H: 42°F
L: 33°F

Thu
H: 41°F
L: 30°F

Fri
H: 40°F
L: 29°F

Sat
H: 42°F
L: 28°F

Sun
H: 53°F
L: 33°F
Air Quality
Nitrogen Dioxide: 1.68 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 72 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:11 PM
Daylight: 14 hrs 25 mins
Moon Transit: 11:47 PM
Moonset: 4:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%
Best Times for Fishing or Hunting
Major Periods
10:53 AM - 1:23 PM12:00 AM - 12:00 AM
Minor Periods
5:58 PM - 7:28 PM4:09 AM - 5:39 AM
Action Rating: 3 out of 5
Flood Advisory issued April 28 at 6:59PM CDT until April 29 at 7:00PM CDT by NWS Duluth MN
Effective: Tue April 28, 2026, 6:59 PM
Expires: Wed April 29, 2026, 7:00 PM
* WHAT...Small stream flooding caused by rain and snowmelt continues. * WHERE...In Minnesota, Cook and Lake Counties. * WHEN...Until 700 PM CDT Wednesday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. River or stream flows are elevated. Flooding is occurring on area rivers that are popular for waterfall viewing. * ADDITIONAL DETAILS... - At 655 PM CDT Tuesday, river gauges continue to suggest that there are areas of high water and localized minor flooding from Monday's rainfall. No additional rainfall is expected. One to two inches of rain that has already fallen and snowmelt runoff in Cook County will keep river levels elevated today. The Baptism River and Beaver River in Lake County are also experiencing high flows today due to runoff from the one to two inches of rainfall yesterday and last night. - Some locations that will experience flooding include... Grand Marais, Gunflint Lake, Two Harbors, Silver Bay, Grand Portage, Clear Lake, Lutsen, Tofte, Beaver Bay, Dumbbell Lake, Forest Center, Temperance River State Park, George Manitou State Park, Taconite Harbor, Sugar Loaf Cove, Isabella, Little Saganaga Lake, Little Marais, Finland and Alpine Lake. - Flood safety information can be found at www.weather.gov/safety/flood.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Campers and hikers should avoid flooded trail crossings. If camping at a site along or near the banks of rivers or streams, move away from those locations and seek higher ground. Trails in hilly terrain can quickly become unstable during or shortly after heavy rainfall.
Weather Forecast
Air Quality
Nitrogen Dioxide: 2.15 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 71.12 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:11 PM
Daylight: 14 hrs 25 mins
Moon Transit: 11:47 PM
Moonset: 4:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%
Best Times for Fishing or Hunting
Major Periods
10:53 AM - 1:23 PM12:00 AM - 12:00 AM
Minor Periods
5:58 PM - 7:28 PM4:09 AM - 5:39 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.53 μg/m3
Sulphur Dioxide: 0.72 μg/m3
Ozone: 73.8 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:13 PM
Daylight: 14 hrs 28 mins
Moon Transit: 12:00 AM
Moonset: 4:55 AM
Moon Phase: Full
Moon Illumination: 99.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM11:35 AM - 2:05 PM
Minor Periods
7:08 PM - 8:38 PM4:25 AM - 5:55 AM
Action Rating: 5 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.24 μg/m3
Sulphur Dioxide: 0.76 μg/m3
Ozone: 88.2 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:14 PM
Daylight: 14 hrs 31 mins
Moon Transit: 12:30 AM
Moonset: 5:13 AM
Moon Phase: Full
Moon Illumination: 100.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 2:30 AM12:20 AM - 2:50 PM
Minor Periods
8:19 PM - 9:49 PM4:43 AM - 6:13 AM
Action Rating: 5 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 87.64 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:16 PM
Daylight: 14 hrs 34 mins
Moon Transit: 1:16 AM
Moonset: 5:36 AM
Moon Phase: Full
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:46 AM - 3:16 AM1:07 PM - 3:37 PM
Minor Periods
9:28 PM - 10:58 PM5:06 AM - 6:36 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 2.45 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 84.38 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 8:17 PM
Daylight: 14 hrs 37 mins
Moon Transit: 2:04 AM
Moonset: 6:04 AM
Moon Phase: Full
Moon Illumination: 94.4%
Best Times for Fishing or Hunting
Major Periods
1:34 AM - 4:04 AM1:56 PM - 4:26 PM
Minor Periods
12:00 AM - 12:00 AM5:34 AM - 7:04 AM
Action Rating: 4 out of 5
