Water Temperature of Lake Michigan Near Winthrop Harbor, IL

Current Water Temperature

71.1°F

Measurement Time: Thursday, September 18, 2025, 2:20 AM CDT

Temperature Locations

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Local Points of Interest

Pleasant Prairie, WI

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Lake Michigan

Station Name: Winthrop Harbor Buoy, IL
Station Type: Buoy
Data Source: National Data Buoy Center

Elevation Above Sea Level: 574 feet / 175 meters

Nearest Address:
Offshore
Winthrop Harbor, IL 60096
Lake County

GPS Coordinates: 42.491, -87.779

Nearby Water Temperatures

Lake Michigan, Waukegan, IL (8.5 mi)
Lake Michigan, Racine, WI (16.1 mi)
Fox River, Burlington, WI (24.2 mi)
Lake Michigan, Wilmette, IL (25.4 mi)
Fox River, McHenry, IL (26.8 mi)
Root River, Franklin, WI (27.4 mi)
Lake Michigan, Milwaukee, WI (37.3 mi)
Honey Creek, Wauwatosa, WI (39.9 mi)
Lake Michigan, Lake Michigan, MI (40.3 mi)
Eagle Spring Lake, Mukwonago, WI (41.7 mi)
Lake Michigan, Chicago, IL (42.8 mi)
Chicago River, Chicago, IL (45.4 mi)
Cal-Sag Channel, Blue Island, IL (58.2 mi)
Grand Calumet River, Chicago, IL (59.2 mi)
Indiana Harbor Canal, East Chicago, IN (60.3 mi)

Weather Near Winthrop Harbor, Illinois

Current Weather

57.9°F
Mist
Conditions: Mist
Humidity: 90%
Feels Like: 58.7°F
Wind: SSW 2.9 mph
Wind Gusts: 6.1 mph
Pressure: 30.05 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 1 mi
UV Index: 0

Five Day Weather Forecast

Partly Cloudy
Thu
H: 75°F
L: 55°F
Patchy rain nearby
Fri
H: 74°F
L: 61°F
Patchy rain nearby
Sat
H: 73°F
L: 66°F
Patchy rain nearby
Sun
H: 76°F
L: 66°F
Moderate rain
Mon
H: 75°F
L: 65°F

Air Quality

PM2.5: 25.16 μg/m3
PM10: 25.9 μg/m3
Carbon Monoxide: 495.8 μg/m3
Nitrogen Dioxide: 37.74 μg/m3
Sulphur Dioxide: 11.47 μg/m3
Ozone: 97 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 12:45 AM
Sunset: 6:55 PM
Daylight: 12 hrs 20 mins
Moonrise: 3:00 AM
Moon Transit: 10:27 AM
Moonset: 5:42 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:57 AM - 12:27 AM

Minor Periods

5:12 PM - 6:42 PM
2:30 AM - 4:00 AM

Action Rating: 3 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 64.4°F
Average Humidity: 89%
Chance of Rain: 0%
Wind: 9.2 mph
UV Index: 1.4

Air Quality

AQI: 2 - Moderate
PM2.5: 28.12 μg/m3
PM10: 28.9 μg/m3
Carbon Monoxide: 507.12 μg/m3
Nitrogen Dioxide: 33.88 μg/m3
Sulphur Dioxide: 8.25 μg/m3
Ozone: 107.64 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 12:45 AM
Sunset: 6:55 PM
Daylight: 12 hrs 20 mins
Moonrise: 3:00 AM
Moon Transit: 10:27 AM
Moonset: 5:42 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:57 AM - 12:27 AM

Minor Periods

5:12 PM - 6:42 PM
2:30 AM - 4:00 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 67.2°F
Average Humidity: 92%
Chance of Rain: 80%
Wind: 10.7 mph
UV Index: 1.1

Air Quality

AQI: 1 - Good
PM2.5: 8.66 μg/m3
PM10: 8.98 μg/m3
Carbon Monoxide: 332.85 μg/m3
Nitrogen Dioxide: 8.31 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 85.48 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 12:44 AM
Sunset: 6:53 PM
Daylight: 12 hrs 17 mins
Moonrise: 4:10 AM
Moon Transit: 11:14 AM
Moonset: 6:05 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:44 AM - 1:14 PM

Minor Periods

5:35 PM - 7:05 PM
3:40 AM - 5:10 AM

Action Rating: 3 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 68.9°F
Average Humidity: 85%
Chance of Rain: 88%
Wind: 11.4 mph
UV Index: 1.3

Air Quality

AQI: 2 - Moderate
PM2.5: 20.24 μg/m3
PM10: 20.6 μg/m3
Carbon Monoxide: 380.8 μg/m3
Nitrogen Dioxide: 21.71 μg/m3
Sulphur Dioxide: 7.41 μg/m3
Ozone: 93.16 μg/m3

Astronomical

Sunrise: 6:37 AM
Sun Transit: 12:44 AM
Sunset: 6:51 PM
Daylight: 12 hrs 15 mins
Moonrise: 5:18 AM
Moon Transit: 11:57 AM
Moonset: 6:25 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:27 AM - 1:57 PM

Minor Periods

5:55 PM - 7:25 PM
4:48 AM - 6:18 AM

Action Rating: 3 out of 5

Sunday, September 21, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 69.7°F
Average Humidity: 78%
Chance of Rain: 88%
Wind: 11.2 mph
UV Index: 0.9

Air Quality

AQI: 2 - Moderate
PM2.5: 39.72 μg/m3
PM10: 40.2 μg/m3
Carbon Monoxide: 682.08 μg/m3
Nitrogen Dioxide: 60.3 μg/m3
Sulphur Dioxide: 11.7 μg/m3
Ozone: 70.15 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 12:44 AM
Sunset: 6:50 PM
Daylight: 12 hrs 12 mins
Moonrise: 6:23 AM
Moon Transit: 12:38 AM
Moonset: 6:43 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:06 AM - 2:36 AM
12:08 AM - 2:38 PM

Minor Periods

6:13 PM - 7:43 PM
5:53 AM - 7:23 AM

Action Rating: 3 out of 5

Monday, September 22, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 67.8°F
Average Humidity: 90%
Chance of Rain: 82%
Wind: 11 mph
UV Index: 0

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 12:43 AM
Sunset: 6:48 PM
Daylight: 12 hrs 9 mins
Moonrise: 7:27 AM
Moon Transit: 1:19 PM
Moonset: 7:01 PM
Moon Phase: New
Moon Illumination: 2.9%

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
12:49 AM - 3:19 PM

Minor Periods

6:31 PM - 8:01 PM
6:57 AM - 8:27 AM

Action Rating: 5 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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