Water Temperature of Duluth Harbor in Duluth, MN
Current Water Temperature
Measurement Time: Tuesday, September 23, 2025, 10:18 PM CDT
Temperature Locations
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Local Points of Interest
Lake Superior; Park Point; Coast Guard Basin; Duluth CanalSponsored Content
Station Name: 9099064 - Duluth, MN
Station Type: Fixed
Data Source: National Data Buoy Center
Elevation Above Sea Level: 597 feet / 182 meters
Nearest Address:
870 Minnesota Ave
Duluth, MN 55802
St. Louis County
GPS Coordinates: 46.776, -92.092
Nearby Water Temperatures
Lake Superior, Superior, WI (4.0 mi)Lake Superior, Duluth, MN (8.6 mi)
Lake Superior, Duluth, MN (9.6 mi)
Lake Superior, Duluth, MN (12.7 mi)
St. Louis River, Scanlon, MN (16.3 mi)
Knife River, Knife River, MN (18.4 mi)
Bois Brule River, Maple, WI (23.7 mi)
Lake Superior, Two Harbors, MN (26.2 mi)
Saint Louis River, Hoyt Lakes, MN (48.8 mi)
St. Croix River, Danbury, WI (48.9 mi)
Namekagon River, Cable, WI (55.3 mi)
Baptism River, Illgen City, MN (57.2 mi)
Chequamegon Bay, Ashland, WI (58.8 mi)
Partrige River, Babbitt, MN (58.8 mi)
Dunka River, Babbitt, MN (62.5 mi)
Weather for Duluth, Minnesota
Current Weather

Humidity: 100%
Feels Like: 59.2°F
Wind: ENE 4 mph
Wind Gusts: 7.1 mph
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 6 mi
UV Index: 0
Five Day Weather Forecast

Wed
H: 72°F
L: 55°F

Thu
H: 81°F
L: 53°F

Fri
H: 70°F
L: 53°F

Sat
H: 69°F
L: 53°F

Sun
H: 72°F
L: 48°F
Air Quality
Nitrogen Dioxide: 12.03 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 60 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:01 PM
Daylight: 12 hrs 3 mins
Moon Transit: 3:00 PM
Moonset: 7:47 PM
Moon Phase: New
Moon Illumination: 3.6%
Best Times for Fishing or Hunting
Major Periods
1:51 AM - 4:21 AM2:30 PM - 5:00 PM
Minor Periods
7:17 PM - 8:47 PM9:33 AM - 11:03 AM
Action Rating: 4 out of 5
Dense Fog Advisory issued September 23 at 7:05PM CDT until September 24 at 11:00AM CDT by NWS Duluth MN
Effective: Tue September 23, 2025, 7:05 PM
Expires: Wed September 24, 2025, 11:00 AM
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, South Itasca, Carlton, and South and Central St. Louis Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Fond du Lac Band, the Bad River Reservation, the Red Cliff Band, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bois Forte Band, Lake Vermilion area and the Mille Lacs Band, Hinckley, Lena Lake, East Lake and, Big Sandy Lake areas. Other locations including Madeline Island and the Apostle Islands National Lakeshore. * WHEN...From 1 AM to 11 AM CDT Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous.
If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Dense Fog Advisory issued September 23 at 7:05PM CDT until September 24 at 11:00AM CDT by NWS Duluth MN
Effective: Tue September 23, 2025, 7:05 PM
Expires: Wed September 24, 2025, 11:00 AM
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, South Itasca, Carlton, and South and Central St. Louis Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Fond du Lac Band, the Bad River Reservation, the Red Cliff Band, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bois Forte Band, Lake Vermilion area and the Mille Lacs Band, Hinckley, Lena Lake, East Lake and, Big Sandy Lake areas. Other locations including Madeline Island and the Apostle Islands National Lakeshore. * WHEN...From 1 AM to 11 AM CDT Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous.
If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Dense Fog Advisory issued September 23 at 7:05PM CDT until September 24 at 11:00AM CDT by NWS Duluth MN
Effective: Tue September 23, 2025, 7:05 PM
Expires: Wed September 24, 2025, 11:00 AM
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, South Itasca, Carlton, and South and Central St. Louis Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Fond du Lac Band, the Bad River Reservation, the Red Cliff Band, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bois Forte Band, Lake Vermilion area and the Mille Lacs Band, Hinckley, Lena Lake, East Lake and, Big Sandy Lake areas. Other locations including Madeline Island and the Apostle Islands National Lakeshore. * WHEN...From 1 AM to 11 AM CDT Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous.
If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Dense Fog Advisory issued September 23 at 7:05PM CDT until September 24 at 11:00AM CDT by NWS Duluth MN
Effective: Tue September 23, 2025, 7:05 PM
Expires: Wed September 24, 2025, 11:00 AM
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, South Itasca, Carlton, and South and Central St. Louis Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Fond du Lac Band, the Bad River Reservation, the Red Cliff Band, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bois Forte Band, Lake Vermilion area and the Mille Lacs Band, Hinckley, Lena Lake, East Lake and, Big Sandy Lake areas. Other locations including Madeline Island and the Apostle Islands National Lakeshore. * WHEN...From 1 AM to 11 AM CDT Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous.
If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Dense Fog Advisory issued September 23 at 7:05PM CDT until September 24 at 11:00AM CDT by NWS Duluth MN
Effective: Tue September 23, 2025, 7:05 PM
Expires: Wed September 24, 2025, 11:00 AM
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, South Itasca, Carlton, and South and Central St. Louis Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Fond du Lac Band, the Bad River Reservation, the Red Cliff Band, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bois Forte Band, Lake Vermilion area and the Mille Lacs Band, Hinckley, Lena Lake, East Lake and, Big Sandy Lake areas. Other locations including Madeline Island and the Apostle Islands National Lakeshore. * WHEN...From 1 AM to 11 AM CDT Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous.
If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Weather Forecast
Average Temperature: 62.5°F
Average Humidity: 83%
Wind: 4.7 mph
UV Index: 1
Air Quality
Nitrogen Dioxide: 8.86 μg/m3
Sulphur Dioxide: 2.04 μg/m3
Ozone: 81.92 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 7:01 PM
Daylight: 12 hrs 3 mins
Moon Transit: 3:00 PM
Moonset: 7:47 PM
Moon Phase: New
Moon Illumination: 3.6%
Best Times for Fishing or Hunting
Major Periods
1:51 AM - 4:21 AM2:30 PM - 5:00 PM
Minor Periods
7:17 PM - 8:47 PM9:33 AM - 11:03 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 65.5°F
Average Humidity: 80%
Wind: 11.2 mph
UV Index: 1.1
Air Quality
Nitrogen Dioxide: 8.61 μg/m3
Sulphur Dioxide: 2.73 μg/m3
Ozone: 76.48 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 6:59 PM
Daylight: 12 hrs mins
Moon Transit: 3:44 PM
Moonset: 8:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.9%
Best Times for Fishing or Hunting
Major Periods
2:34 AM - 5:04 AM3:14 PM - 5:44 PM
Minor Periods
7:39 PM - 9:09 PM10:41 AM - 12:11 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 59.5°F
Average Humidity: 75%
Wind: 12.3 mph
UV Index: 1.1
Air Quality
Nitrogen Dioxide: 3.63 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 78.16 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 6:57 PM
Daylight: 11 hrs 56 mins
Moon Transit: 4:30 PM
Moonset: 8:36 PM
Moon Phase: Waxing Crescent
Moon Illumination: 16.4%
Best Times for Fishing or Hunting
Major Periods
3:19 AM - 5:49 AM4:00 PM - 6:30 PM
Minor Periods
8:06 PM - 9:36 PM11:50 AM - 1:20 PM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 60.1°F
Average Humidity: 60%
Wind: 12.1 mph
UV Index: 1
Air Quality
Nitrogen Dioxide: 5.42 μg/m3
Sulphur Dioxide: 2.18 μg/m3
Ozone: 78.85 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 6:55 PM
Daylight: 11 hrs 53 mins
Moon Transit: 5:20 PM
Moonset: 9:11 PM
Moon Phase: Waxing Crescent
Moon Illumination: 25.6%
Best Times for Fishing or Hunting
Major Periods
4:08 AM - 6:38 AM4:50 PM - 7:20 PM
Minor Periods
8:41 PM - 10:11 PM12:55 AM - 2:25 PM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 57°F
Average Humidity: 46%
Wind: 9.6 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 12:58 AM
Sunset: 6:53 PM
Daylight: 11 hrs 50 mins
Moon Transit: 6:12 PM
Moonset: 9:57 PM
Moon Phase: First Quarter
Moon Illumination: 36.0%
Best Times for Fishing or Hunting
Major Periods
4:58 AM - 7:28 AM5:42 PM - 8:12 PM
Minor Periods
9:27 PM - 10:57 PM1:56 PM - 3:26 PM
Action Rating: 3 out of 5