Water Temperature of Lake Superior in Duluth, MN
Current Water Temperature
Measurement Time: Saturday, September 16, 2023, 12:00 AM CDT
Temperature Locations
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Local Points of Interest
Lakewood, MNSponsored Content
Station Name: Lakewood Water Plant
Data Source: USGS
Elevation Above Sea Level: 614 feet / 187 meters
Nearest Address:
8126 Congdon Blvd
Duluth, MN 55804
St. Louis County
GPS Coordinates: 46.8619, -91.9600
Nearby Water Temperatures
Lake Superior, Duluth, MN (1.4 mi)Lake Superior, Duluth, MN (7.0 mi)
Duluth Harbor, Duluth, MN (8.6 mi)
Knife River, Knife River, MN (9.9 mi)
Lake Superior, Superior, WI (10.9 mi)
Lake Superior, Two Harbors, MN (17.6 mi)
Bois Brule River, Maple, WI (20.1 mi)
St. Louis River, Scanlon, MN (24.3 mi)
Saint Louis River, Hoyt Lakes, MN (42.9 mi)
Baptism River, Illgen City, MN (48.6 mi)
Partrige River, Babbitt, MN (52.4 mi)
Chequamegon Bay, Ashland, WI (54.1 mi)
Dunka River, Babbitt, MN (55.8 mi)
St. Croix River, Danbury, WI (56.0 mi)
Namekagon River, Cable, WI (56.3 mi)
Weather for Duluth, Minnesota
Current Weather

Humidity: 60%
Feels Like: 66.4°F
Wind: WNW 2.2 mph
Wind Gusts: 6.7 mph
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 4 mi
UV Index: 0
Five Day Weather Forecast

Thu
H: 75°F
L: 54°F

Fri
H: 82°F
L: 53°F

Sat
H: 77°F
L: 56°F

Sun
H: 63°F
L: 56°F

Mon
H: 64°F
L: 61°F
Air Quality
Nitrogen Dioxide: 11.1 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 82 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:41 PM
Daylight: 14 hrs 54 mins
Moon Transit: 6:26 PM
Moonset: 12:01 AM
Moon Phase: First Quarter
Moon Illumination: 36.7%
Best Times for Fishing or Hunting
Major Periods
5:19 AM - 7:49 AM5:56 PM - 8:26 PM
Minor Periods
12:54 AM - 2:24 PM12:00 AM - 12:00 AM
Action Rating: 4 out of 5
Air Quality Alert issued July 31 at 10:47AM CDT by NWS Duluth MN
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Thu July 31, 2025, 10:47 AM
Expires: Fri August 1, 2025, 12:15 PM
The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Ashland, Bayfield, Burnett, Douglas, Iron, Price, Sawyer, Washburn. WHAT...The PM2.5 AQI is expected to reach the Unhealthy level. WHERE...All of Wisconsin WHEN...Until noon Friday, August 1 Precautionary/Preparedness Actions: Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. People with asthma: Follow your asthma action plan and keep quick-relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Everyone else: Keep outdoor activities shorter and less intense. Go inside if you have symptoms. Additional Details: Canadian wildfire smoke will continue to impact Wisconsin`s surface air quality over the next several days. Widespread Unhealthy (Red) AQI for PM2.5 is expected across Wisconsin on Thursday, with NowCast AQI values in the Very Unhealthy (Purple) category possible. Conditions are expected to slowly improve beginning Friday. However, Unhealthy for Sensitive Groups (Orange) to Unhealthy (Red) AQI will remain possible through the weekend. Conditions will be reevaluated on a day-to-day basis through the weekend, including updates to the forecast and any associated Air Quality Advisories. For more information on current air quality, please see: https://airquality.wi.gov
Air Quality Alert issued July 31 at 10:47AM CDT by NWS Duluth MN
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Thu July 31, 2025, 10:47 AM
Expires: Fri August 1, 2025, 12:15 PM
The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Ashland, Bayfield, Burnett, Douglas, Iron, Price, Sawyer, Washburn. WHAT...The PM2.5 AQI is expected to reach the Unhealthy level. WHERE...All of Wisconsin WHEN...Until noon Friday, August 1 Precautionary/Preparedness Actions: Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. People with asthma: Follow your asthma action plan and keep quick-relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Everyone else: Keep outdoor activities shorter and less intense. Go inside if you have symptoms. Additional Details: Canadian wildfire smoke will continue to impact Wisconsin`s surface air quality over the next several days. Widespread Unhealthy (Red) AQI for PM2.5 is expected across Wisconsin on Thursday, with NowCast AQI values in the Very Unhealthy (Purple) category possible. Conditions are expected to slowly improve beginning Friday. However, Unhealthy for Sensitive Groups (Orange) to Unhealthy (Red) AQI will remain possible through the weekend. Conditions will be reevaluated on a day-to-day basis through the weekend, including updates to the forecast and any associated Air Quality Advisories. For more information on current air quality, please see: https://airquality.wi.gov
Air Quality Alert issued July 29 at 3:54PM CDT by NWS Duluth MN
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Tue July 29, 2025, 3:54 PM
Expires: Sat August 2, 2025, 5:00 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...West central, east central, central, south central, southeast, north central, northwest, southwest, and northeast Minnesota. * WHEN...Until 5 PM CDT Saturday. * 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...Northerly winds will continue transporting waves of heavy surface smoke from wildfires across Manitoba and Saskatchewan into Minnesota. Smoke will move south across all of Minnesota and linger through Saturday afternoon. The smoke will be reinforced by an area of high pressure that will create light winds and limit the dispersion of smoke. Therefore the air quality alert has been expanded to include all of Minnesota and extended until Saturday afternoon when the air quality is forecasted to improve.
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 30 at 4:07PM CDT by NWS Duluth MN
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Wed July 30, 2025, 4:07 PM
Expires: Sat August 2, 2025, 5:00 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 Purple or Very Unhealthy category. * WHERE....The North Shore of Lake Superior and surrounding areas including Duluth, Two Harbors, Grand Portage, Grand Marais, and Cloquet. * WHEN...Until 5 PM CDT Saturday. * IMPACTS...The risk of health effects is increased for everyone. * ADDITIONAL DETAILS...Northerly winds will continue transporting waves of heavy surface smoke from wildfires across Manitoba and Saskatchewan into Minnesota. Smoke will move south across all of Minnesota and linger through Saturday afternoon. The smoke will be reinforced by an area of high pressure that will create light winds and limit the dispersion of smoke. Heavier smoke is now expected to make it into southern Minnesota, therefore all of Minnesota will likely experience Red/Unhealthy AQI at times through Saturday afternoon when the air quality is forecasted to improve. Very dense smoke is located over Lake Superior, and the AQI forecast has been upgraded to Purple, which is very unhealthy air quality.
Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid all physical activities outdoors. The general public should avoid 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 29 at 3:54PM CDT by NWS Duluth MN
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Tue July 29, 2025, 3:54 PM
Expires: Sat August 2, 2025, 5:00 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...West central, east central, central, south central, southeast, north central, northwest, southwest, and northeast Minnesota. * WHEN...Until 5 PM CDT Saturday. * 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...Northerly winds will continue transporting waves of heavy surface smoke from wildfires across Manitoba and Saskatchewan into Minnesota. Smoke will move south across all of Minnesota and linger through Saturday afternoon. The smoke will be reinforced by an area of high pressure that will create light winds and limit the dispersion of smoke. Therefore the air quality alert has been expanded to include all of Minnesota and extended until Saturday afternoon when the air quality is forecasted to improve.
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°F
Average Humidity: 64%
Wind: 6.5 mph
UV Index: 1.6
Air Quality
Nitrogen Dioxide: 4.54 μg/m3
Sulphur Dioxide: 1.69 μg/m3
Ozone: 102.64 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:41 PM
Daylight: 14 hrs 54 mins
Moon Transit: 6:26 PM
Moonset: 12:01 AM
Moon Phase: First Quarter
Moon Illumination: 36.7%
Best Times for Fishing or Hunting
Major Periods
5:19 AM - 7:49 AM5:56 PM - 8:26 PM
Minor Periods
12:54 AM - 2:24 PM12:00 AM - 12:00 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 68.4°F
Average Humidity: 59%
Wind: 6.5 mph
UV Index: 1.7
Air Quality
Nitrogen Dioxide: 8.81 μg/m3
Sulphur Dioxide: 5.53 μg/m3
Ozone: 122.76 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:40 PM
Daylight: 14 hrs 52 mins
Moon Transit: 7:09 PM
Moonset: 12:18 AM
Moon Phase: First Quarter
Moon Illumination: 47.9%
Best Times for Fishing or Hunting
Major Periods
6:01 AM - 8:31 AM6:39 PM - 9:09 PM
Minor Periods
2:02 PM - 3:32 PM12:00 AM - 12:00 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 67.3°F
Average Humidity: 66%
Wind: 7.6 mph
UV Index: 1.9
Air Quality
Nitrogen Dioxide: 9.18 μg/m3
Sulphur Dioxide: 3.52 μg/m3
Ozone: 126.72 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:38 PM
Daylight: 14 hrs 49 mins
Moon Transit: 7:56 PM
Moonset: 12:39 AM
Moon Phase: First Quarter
Moon Illumination: 59.1%
Best Times for Fishing or Hunting
Major Periods
6:46 AM - 9:16 AM7:26 PM - 9:56 PM
Minor Periods
3:11 PM - 4:41 PM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 60.4°F
Average Humidity: 88%
Wind: 7.4 mph
UV Index: 1.2
Air Quality
Nitrogen Dioxide: 8.3 μg/m3
Sulphur Dioxide: 3.57 μg/m3
Ozone: 130.08 μg/m3
Astronomical
Sun Transit: 1:14 PM
Sunset: 8:37 PM
Daylight: 14 hrs 46 mins
Moon Transit: 8:45 PM
Moonset: 12:05 AM
Moon Phase: First Quarter
Moon Illumination: 70.0%
Best Times for Fishing or Hunting
Major Periods
7:34 AM - 10:04 AM8:15 PM - 10:45 PM
Minor Periods
4:19 PM - 5:49 PM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 61.9°F
Average Humidity: 95%
Wind: 11 mph
UV Index: 0.4
Air Quality
Nitrogen Dioxide: 12.18 μg/m3
Sulphur Dioxide: 2.99 μg/m3
Ozone: 104.69 μg/m3
Astronomical
Sun Transit: 1:13 PM
Sunset: 8:35 PM
Daylight: 14 hrs 44 mins
Moon Transit: 9:38 PM
Moonset: 12:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 79.8%
Best Times for Fishing or Hunting
Major Periods
8:25 AM - 10:55 AM9:08 PM - 11:38 PM
Minor Periods
5:21 PM - 6:51 PM12:09 AM - 1:39 AM
Action Rating: 2 out of 5