NDBC buoy, Michigan

Winthrop Harbor Buoy (45187)

Name: NDBC buoy 45187 latest observation
Creator: Tide & Temp
License: https://creativecommons.org/publicdomain/zero/1.0/

Water 56.8 F as of 09:00 UTC, Sunday, October 18, 2026.

Water temperature at NDBC buoy 45187 (Winthrop Harbor Buoy, IL) is 56.8 F (13.8 C), observed 09:00 UTC on October 18, 2026.
Air temperature at the buoy is 48 F, cooler than the water.

Water

56.8 F

13.8 C

Air

48 F

8.8 C

Wind

12 kt

Pressure

1024 hPa

sea level

Position 42.491, -87.779 · Moored Buoy · owner code UC. Latest observation from NDBC station 45187; this site refreshes once a day, the buoy reports hourly.

All Michigan water temperatures