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Notice regarding image quality

Coastwatch users:
Due to technical issues, this site is no longer able to produce updated surface water temperature contour maps. Please check back in July for more information about future resources.
Daily maps of observed surface temperatures can be found at these NOAA links:
Lake Superior:
Lake Michigan & Lake Huron:
Lake Erie:
Lake Ontario:

Lake Ontario
[Full Lake View]

Lake Ontario Regions
[Western Region] [Eastern Region]

Lake Ontario Port Images
[Niagara to Olcott] [Point Breeze to Manitou Beach] [Sandy Harbour Beach to Pultneyville]
[Pultneyville to Oswego] [Henderson Harbor to Cape Vincent]

Regional and Port Image Map

Select a label to view region or port map.

Niagara/Olcott Port Area Point Breeze/Manitou Beach Port Area Sandy Harbour Beach/Pultneyville Port Area Pultneyville/Oswego Port Area Henderson Harbor/Cape Vincent Port Area Western Lake Ontario Eastern Lake Ontario
Most questions can be answered by your Sea Grant Agent or on our CoastWatch Help Pages. Please send comments or bug reports to Please include the name of the location or file that's giving you trouble, as well as the type of software you are running. This is a cooperative project between the NOAA CoastWatch Great Lakes Regional Node located at the NOAA Great Lakes Environmental Research Laboratory in Ann Arbor and the Sea Grant Network.
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