Water Temperature of Lake Michigan Near Winthrop Harbor, IL

Current Water Temperature

54.1°F

Measurement Time: Tuesday, May 26, 2026, 2:20 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

78.1°F
Sunny
Sunny
77°F
80.7°F
40%
SSE 7.4 mph
14.3 mph
82.5°F
47.5°F
0 in
0%
9 mi
1016 mbar
4.3

Five Day Weather Forecast

Sunny
Tue
H: 86°F
L: 60°F
Patchy rain nearby
Wed
H: 71°F
L: 57°F
Sunny
Thu
H: 61°F
L: 49°F
Sunny
Fri
H: 68°F
L: 50°F
Sunny
Sat
H: 62°F
L: 53°F

Air Quality

AQI: 1 - Good
PM2.5: 14.35 μg/m3
PM10: 15.25 μg/m3
Carbon Monoxide: 206.85 μg/m3
Nitrogen Dioxide: 22.25 μg/m3
Sulphur Dioxide: 4.15 μg/m3
Ozone: 101 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:48 AM
Sunset: 8:17 PM
Daylight: 14 hrs 58 mins
Moonrise: 4:01 PM
Moon Transit: 9:35 PM
Moonset: 2:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

9:03 AM - 11:33 AM
9:05 PM - 11:35 PM

Minor Periods

3:31 PM - 5:01 PM
2:11 AM - 3:41 AM

Action Rating: 2 out of 5

Air Quality Alert issued May 26 at 11:16AM CDT by NWS Chicago IL

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue May 26, 2026, 11:16 AM
Expires: Thu May 28, 2026, 12:00 AM

The Illinois Environmental Protection Agency has determined that an Air Pollution Action Day will be declared for the greater Chicago Metropolitan Area through Wednesday Night. A Chicago area Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups category of the Air Quality Index for multiple days. Ozone is expected to be the primary pollutant of concern. Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity. Area residents are urged to reduce pollution levels. Air quality forecasts, current air quality, and tips on how you can reduce your emissions can be found at www.airnow.gov. Media contact...Illinois EPA.


Tuesday, May 26, 2026

Weather Forecast

Sunny
86.2°F
60.1°F
72.8°F
47%
0 in
0%
0%
7.6 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 11.16 μg/m3
PM10: 11.81 μg/m3
Carbon Monoxide: 190.17 μg/m3
Nitrogen Dioxide: 17.23 μg/m3
Sulphur Dioxide: 3.21 μg/m3
Ozone: 86.84 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:48 AM
Sunset: 8:17 PM
Daylight: 14 hrs 58 mins
Moonrise: 4:01 PM
Moon Transit: 9:35 PM
Moonset: 2:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

9:03 AM - 11:33 AM
9:05 PM - 11:35 PM

Minor Periods

3:31 PM - 5:01 PM
2:11 AM - 3:41 AM

Action Rating: 2 out of 5

Wednesday, May 27, 2026

Weather Forecast

Patchy rain nearby
71.4°F
56.5°F
64.5°F
65%
0.01 in
87%
0%
14.8 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 14.4 μg/m3
PM10: 15.17 μg/m3
Carbon Monoxide: 210.65 μg/m3
Nitrogen Dioxide: 21.22 μg/m3
Sulphur Dioxide: 2.83 μg/m3
Ozone: 82.92 μg/m3

Astronomical

Sunrise: 5:19 AM
Sun Transit: 12:48 AM
Sunset: 8:18 PM
Daylight: 14 hrs 59 mins
Moonrise: 5:06 PM
Moon Transit: 10:18 PM
Moonset: 3:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

9:45 AM - 12:15 AM
12:00 AM - 12:00 AM

Minor Periods

4:36 PM - 6:06 PM
2:30 AM - 4:00 AM

Action Rating: 2 out of 5

Thursday, May 28, 2026

Weather Forecast

Sunny
61.1°F
49.3°F
55.2°F
72%
0 in
0%
0%
15 mph
8.2


Air Quality

AQI: 1 - Good
PM2.5: 4.92 μg/m3
PM10: 5.12 μg/m3
Carbon Monoxide: 123.25 μg/m3
Nitrogen Dioxide: 6.4 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 79.24 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:48 AM
Sunset: 8:19 PM
Daylight: 15 hrs 1 mins
Moonrise: 6:11 PM
Moon Transit: 11:03 PM
Moonset: 3:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

10:28 AM - 12:58 AM
12:00 AM - 12:00 AM

Minor Periods

5:41 PM - 7:11 PM
2:52 AM - 4:22 AM

Action Rating: 2 out of 5

Friday, May 29, 2026

Weather Forecast

Sunny
67.7°F
49.9°F
58.7°F
70%
0 in
0%
0%
5.8 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 5.55 μg/m3
PM10: 5.74 μg/m3
Carbon Monoxide: 150.9 μg/m3
Nitrogen Dioxide: 11.75 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 67.28 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:48 AM
Sunset: 8:20 PM
Daylight: 15 hrs 2 mins
Moonrise: 7:16 PM
Moon Transit: 11:50 PM
Moonset: 3:48 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.4%

Best Times for Fishing or Hunting

Major Periods

11:14 AM - 1:44 PM
12:00 AM - 12:00 AM

Minor Periods

6:46 PM - 8:16 PM
3:18 AM - 4:48 AM

Action Rating: 4 out of 5

Saturday, May 30, 2026

Weather Forecast

Sunny
61.7°F
52.7°F
56.5°F
69%
0 in
0%
0%
12.3 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 4.62 μg/m3
PM10: 5.17 μg/m3
Carbon Monoxide: 157.08 μg/m3
Nitrogen Dioxide: 10.64 μg/m3
Sulphur Dioxide: 1.46 μg/m3
Ozone: 72.46 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:48 AM
Sunset: 8:21 PM
Daylight: 15 hrs 3 mins
Moonrise: 8:19 PM
Moon Transit: 12:00 AM
Moonset: 4:19 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:02 AM - 2:32 PM

Minor Periods

7:49 PM - 9:19 PM
3:49 AM - 5:19 AM

Action Rating: 4 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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