Water temperature
Lake Ontario (Lake America) Water Temperature
The current Lake Ontario (Lake America) water temperature reading comes from NOAA NDBC Buoy 45012, in the eastern part of Lake Ontario. This buoy reports surface water temperature roughly every 30 to 60 minutes. Water temperature is critical for swimming safety, diving, and knowing when fish species are most active. Surface temperature can change quickly when wind shifts water offshore, pulling colder water up from the lake's deeper layers within hours, especially during spring and early summer. This page shows the most recent available reading. If the buoy temporarily stops reporting temperature (marked as missing data), this page will say so rather than showing stale information.
This reading comes from NOAA NDBC Buoy 45012, in the eastern part of Lake Ontario, using the WTMP field from the buoy's standard meteorological report. NDBC updates that report roughly every 30 to 60 minutes.
Water temperature on this buoy is sometimes reported as missing (marked MM by NDBC) even when wind and air temperature are present. When that happens, this page shows "data unavailable" rather than an old or invented number.
Surface temperature can change quickly with wind direction. A shift that pushes surface water offshore can pull colder water up from below within hours, especially in spring and early summer.
Source: NOAA NDBC Buoy 45012, https://www.ndbc.noaa.gov/station_page.php?station=45012