Water Temperature of Lake Michigan Near Winthrop Harbor, IL

Current Water Temperature

48.7°F

Measurement Time: Wednesday, May 13, 2026, 10:30 PM CDT

Temperature Locations

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Local Points of Interest

Pleasant Prairie, WI

Lake Michigan

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

Elevation Above Sea Level: 574 feet

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

39°F
Clear
Clear
35.5°F
42.5°F
89%
NW 4.7 mph
9.9 mph
39.1°F
34.6°F
0 in
0%
9 mi
1018 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 61°F
L: 39°F
Patchy rain nearby
Fri
H: 64°F
L: 48°F
Moderate rain
Sat
H: 74°F
L: 58°F
Patchy rain nearby
Sun
H: 63°F
L: 57°F
Patchy rain nearby
Mon
H: 76°F
L: 60°F

Air Quality

PM2.5: 4.85 μg/m3
PM10: 5.25 μg/m3
Carbon Monoxide: 190.85 μg/m3
Nitrogen Dioxide: 12.45 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 46 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 12:47 AM
Sunset: 8:05 PM
Daylight: 14 hrs 35 mins
Moonrise: 3:49 AM
Moon Transit: 10:42 AM
Moonset: 5:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:12 AM - 12:42 AM

Minor Periods

5:21 PM - 6:51 PM
3:19 AM - 4:49 AM

Action Rating: 2 out of 5

Thursday, May 14, 2026

Weather Forecast

Sunny
61.3°F
39.2°F
49.9°F
63%
0 in
0%
0%
9.8 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 7.05 μg/m3
PM10: 7.63 μg/m3
Carbon Monoxide: 161.37 μg/m3
Nitrogen Dioxide: 15.37 μg/m3
Sulphur Dioxide: 1.99 μg/m3
Ozone: 67.96 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 12:47 AM
Sunset: 8:05 PM
Daylight: 14 hrs 35 mins
Moonrise: 3:49 AM
Moon Transit: 10:42 AM
Moonset: 5:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:12 AM - 12:42 AM

Minor Periods

5:21 PM - 6:51 PM
3:19 AM - 4:49 AM

Action Rating: 2 out of 5

Friday, May 15, 2026

Weather Forecast

Patchy rain nearby
63.7°F
48°F
55.2°F
78%
0.06 in
89%
0%
15.7 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 8.58 μg/m3
PM10: 9.16 μg/m3
Carbon Monoxide: 163.53 μg/m3
Nitrogen Dioxide: 12.95 μg/m3
Sulphur Dioxide: 4.68 μg/m3
Ozone: 93.44 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 12:47 AM
Sunset: 8:06 PM
Daylight: 14 hrs 38 mins
Moonrise: 4:16 AM
Moon Transit: 11:36 AM
Moonset: 7:13 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:06 AM - 1:36 PM

Minor Periods

6:43 PM - 8:13 PM
3:46 AM - 5:16 AM

Action Rating: 5 out of 5

Saturday, May 16, 2026

Weather Forecast

Moderate rain
73.9°F
58°F
64.5°F
88%
0.28 in
83%
0%
11 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 9.11 μg/m3
PM10: 10.09 μg/m3
Carbon Monoxide: 173.09 μg/m3
Nitrogen Dioxide: 17.07 μg/m3
Sulphur Dioxide: 3.07 μg/m3
Ozone: 80.76 μg/m3

Astronomical

Sunrise: 5:28 AM
Sun Transit: 12:47 AM
Sunset: 8:08 PM
Daylight: 14 hrs 40 mins
Moonrise: 4:50 AM
Moon Transit: 12:36 AM
Moonset: 8:36 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:06 AM - 2:36 PM

Minor Periods

8:06 PM - 9:36 PM
4:20 AM - 5:50 AM

Action Rating: 5 out of 5

Sunday, May 17, 2026

Weather Forecast

Patchy rain nearby
63.2°F
57.3°F
59.6°F
95%
0.18 in
88%
0%
8.9 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 8.45 μg/m3
PM10: 9.05 μg/m3
Carbon Monoxide: 172.85 μg/m3
Nitrogen Dioxide: 13.65 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 104 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 12:47 AM
Sunset: 8:09 PM
Daylight: 14 hrs 42 mins
Moonrise: 5:34 AM
Moon Transit: 1:40 PM
Moonset: 9:56 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:56 AM - 3:26 AM
1:10 PM - 3:40 PM

Minor Periods

9:26 PM - 10:56 PM
5:04 AM - 6:34 AM

Action Rating: 4 out of 5

Monday, May 18, 2026

Weather Forecast

Patchy rain nearby
75.8°F
60.1°F
67.4°F
85%
0.14 in
85%
0%
19.2 mph
4


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: 5:26 AM
Sun Transit: 12:47 AM
Sunset: 8:10 PM
Daylight: 14 hrs 44 mins
Moonrise: 6:31 AM
Moon Transit: 2:47 PM
Moonset: 11:05 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
2:17 PM - 4:47 PM

Minor Periods

12:00 AM - 12:00 AM
6:01 AM - 7:31 AM

Action Rating: 3 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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