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This site is designed to provide quick updates on current water temperatures of Lake Ontario and projected water temperatures based on NOAA’s GLERL website to facilitate projects on the lake.

This site will update every 12 hours to give the next forecast and predictions.

Current Conditions

Projected Conditions

This site is designed to provide quick updates on water temperatures from NOAA’s GLERL website for specific areas of Lake Ontario. Please click either Nowcast to see current projections for the past 12 hours and Forecast for the to next 72 hours.