Water Temperature of Lake Michigan Near Winthrop Harbor, IL

Current Water Temperature

60.6°F

Measurement Time: Monday, June 8, 2026, 10:40 AM 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

82.9°F
Overcast
Overcast
86.1°F
94°F
70%
WNW 13.4 mph
16.1 mph
87.4°F
71.3°F
0 in
100%
9 mi
1012 mbar
7.2

Five Day Weather Forecast

Sunny
Sat
H: 96°F
L: 71°F
Sunny
Sun
H: 77°F
L: 66°F
Sunny
Mon
H: 82°F
L: 65°F
Sunny
Tue
H: 82°F
L: 68°F
Smoky haze
Wed
H: 70°F
L: 57°F

Air Quality

AQI: 2 - Moderate
PM2.5: 4.1 μg/m3
PM10: 4.5 μg/m3
Carbon Monoxide: 134 μg/m3
Nitrogen Dioxide: 3 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 107 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 12:57 AM
Sunset: 8:25 PM
Daylight: 14 hrs 55 mins
Moonrise: 10:32 AM
Moon Transit: 4:46 PM
Moonset: 10:49 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

4:12 AM - 6:42 AM
4:16 PM - 6:46 PM

Minor Periods

10:19 PM - 11:49 PM
10:02 AM - 11:32 AM

Action Rating: 2 out of 5

Beach Hazards Statement issued July 18 at 3:50AM CDT until July 19 at 10:00AM CDT by NWS Chicago IL

Effective: Sat July 18, 2026, 3:50 AM
Expires: Sat July 18, 2026, 12:00 PM

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 4 to 7 ft expected. * WHERE...In Illinois, Lake, Northern Cook and Central Cook Counties. In Indiana, Lake and Porter Counties. * WHEN...From this evening through early Sunday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com.

Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.


Beach Hazards Statement issued July 18 at 10:10AM CDT until July 19 at 10:00AM CDT by NWS Chicago IL

Effective: Sat July 18, 2026, 10:10 AM
Expires: Sat July 18, 2026, 6:15 PM

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 4 to 7 ft expected. * WHERE...In Illinois, Lake, Northern Cook and Central Cook Counties. In Indiana, Lake and Porter Counties. * WHEN...From 7 PM CDT this evening through Sunday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com.

Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.


Small Craft Advisory issued July 18 at 3:49AM CDT until July 19 at 4:00AM CDT by NWS Chicago IL

Effective: Sat July 18, 2026, 3:49 AM
Expires: Sat July 18, 2026, 12:00 PM

* WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL to Michigan City IN. * WHEN...From 7 PM this evening to 4 AM CDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 18 at 9:54AM CDT until July 19 at 4:00AM CDT by NWS Chicago IL

Effective: Sat July 18, 2026, 9:54 AM
Expires: Sat July 18, 2026, 6:00 PM

* WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Illinois and Indiana nearshore from Winthrop Harbor IL to Michigan City IN. * WHEN...From 7 PM this evening to 4 AM CDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Saturday, July 18, 2026

Weather Forecast

Sunny
95.7°F
70.5°F
81°F
70%
0 in
6%
0%
15.7 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 12.8 μg/m3
PM10: 13.04 μg/m3
Carbon Monoxide: 219.67 μg/m3
Nitrogen Dioxide: 5.27 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 107.29 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 12:57 AM
Sunset: 8:25 PM
Daylight: 14 hrs 55 mins
Moonrise: 10:32 AM
Moon Transit: 4:46 PM
Moonset: 10:49 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

4:12 AM - 6:42 AM
4:16 PM - 6:46 PM

Minor Periods

10:19 PM - 11:49 PM
10:02 AM - 11:32 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
76.6°F
65.9°F
71.3°F
63%
0 in
4%
0%
9.2 mph
6.1


Air Quality

AQI: 2 - Moderate
PM2.5: 30.68 μg/m3
PM10: 31.11 μg/m3
Carbon Monoxide: 235.42 μg/m3
Nitrogen Dioxide: 3.99 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 118.38 μg/m3

Astronomical

Sunrise: 5:31 AM
Sun Transit: 12:57 AM
Sunset: 8:24 PM
Daylight: 14 hrs 53 mins
Moonrise: 11:40 AM
Moon Transit: 5:29 PM
Moonset: 11:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

4:56 AM - 7:26 AM
4:59 PM - 7:29 PM

Minor Periods

12:00 AM - 12:00 AM
11:10 AM - 12:40 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
81.6°F
65°F
73.3°F
74%
0 in
10%
0%
14.1 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 14.33 μg/m3
PM10: 14.47 μg/m3
Carbon Monoxide: 233.88 μg/m3
Nitrogen Dioxide: 9.19 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 113.33 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 12:57 AM
Sunset: 8:23 PM
Daylight: 14 hrs 52 mins
Moonrise: 12:47 AM
Moon Transit: 6:13 PM
Moonset: 12:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

5:39 AM - 8:09 AM
5:43 PM - 8:13 PM

Minor Periods

12:17 AM - 1:47 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Tuesday, July 21, 2026

Weather Forecast

Sunny
82.2°F
68.3°F
74.7°F
74%
0.04 in
57%
0%
16.3 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 4.28 μg/m3
PM10: 4.42 μg/m3
Carbon Monoxide: 140.69 μg/m3
Nitrogen Dioxide: 4.05 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 94.92 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 12:57 AM
Sunset: 8:22 PM
Daylight: 14 hrs 50 mins
Moonrise: 1:53 PM
Moon Transit: 6:57 PM
Moonset: 12:30 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:23 AM - 8:53 AM
6:27 PM - 8:57 PM

Minor Periods

1:23 PM - 2:53 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Smoky haze
70.1°F
57.3°F
64.9°F
68%
0 in
9%
0%
14.5 mph
6


Air Quality

AQI: 2 - Moderate
PM2.5: 35.43 μg/m3
PM10: 36.91 μg/m3
Carbon Monoxide: 681.25 μg/m3
Nitrogen Dioxide: 4.03 μg/m3
Sulphur Dioxide: 2.06 μg/m3
Ozone: 102.63 μg/m3

Astronomical

Sunrise: 5:33 AM
Sun Transit: 12:57 AM
Sunset: 8:21 PM
Daylight: 14 hrs 48 mins
Moonrise: 2:59 PM
Moon Transit: 7:43 PM
Moonset: 12:53 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

7:08 AM - 9:38 AM
7:13 PM - 9:43 PM

Minor Periods

2:29 PM - 3:59 PM
12:00 AM - 12:00 AM

Action Rating: 2 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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