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

Severe Thunderstorm Warning issued July 27 at 10:58AM CDT until July 27 at 12:15PM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon July 27, 2026, 10:58 AM
Expires: Mon July 27, 2026, 12:15 PM

SVRMKX The National Weather Service in Milwaukee/Sullivan has issued a * Severe Thunderstorm Warning for... Eastern Walworth County in southeastern Wisconsin... Racine County in southeastern Wisconsin... Kenosha County in southeastern Wisconsin... * Until 1215 PM CDT. * At 1058 AM CDT, a severe thunderstorm was located near Union Grove, moving east at 35 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Trained weather spotters. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Kenosha, Racine, Mount Pleasant, Pleasant Prairie, Antioch, Lake Geneva, Sturtevant, Union Grove, East Troy, Paddock Lake, Camp Lake, Wind Lake, Winthrop Harbor, Twin Lakes, Rochester, Raymond, Wheatland, Yorkville, Genoa City, and Silver Lake.

For your protection move to an interior room on the lowest floor of a building.

Heat Advisory issued July 27 at 3:02AM CDT until July 27 at 9:00PM CDT by NWS Chicago IL

Effective: Mon July 27, 2026, 3:02 AM
Expires: Mon July 27, 2026, 1:15 PM

* WHAT...Peak heat index values up to 100 to 110 degrees expected. * WHERE...Portions of east central and northeast Illinois and northwest Indiana. * WHEN...Until 9 PM CDT /10 PM EDT/ this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Heat Advisory issued July 27 at 5:48AM CDT until July 27 at 9:00PM CDT by NWS Chicago IL

Effective: Mon July 27, 2026, 5:48 AM
Expires: Mon July 27, 2026, 4:00 PM

* WHAT...Peak heat index values up to 100 to 110 degrees expected. * WHERE...Iroquois, Central Cook, DuPage, Eastern Will, Kankakee, Lake IL, Northern Cook, Northern Will, Southern Cook, and Southern Will Counties. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Beach Hazards Statement issued July 27 at 3:57AM CDT until July 29 at 10:00AM CDT by NWS Chicago IL

Effective: Mon July 27, 2026, 3:57 AM
Expires: Mon July 27, 2026, 12:00 PM

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 5 to 9 ft expected. * WHERE...In Illinois, Lake, Northern Cook and Central Cook Counties. In Indiana, Lake and Porter Counties. * WHEN...From late tonight through Wednesday 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.

Heat Advisory issued July 27 at 9:33AM CDT until July 27 at 9:00PM CDT by NWS Chicago IL

Effective: Mon July 27, 2026, 9:33 AM
Expires: Mon July 27, 2026, 7:45 PM

* WHAT...Heat index values in excess of 105 expected. * WHERE...In Illinois, Central Cook, DuPage, Lake IL, Northern Cook, and Southern Cook Counties. In Indiana, Benton, Jasper, Lake IN, and Newton Counties. * WHEN...Until 9 PM CDT /10 PM EDT/ this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.