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Coastwatch users:
The surface temperature profiles maps are not updating right now due to a server outage at NOAA, which delivers the primary satellite data used to create these maps. NOAA is in the process of restoring the system; the estimated time of restoration is not available currently. Our apologies for any inconvenience, and we will resume normal delivery of the imagery as soon as the data sources are operational again.

Lake Surface Temperature Reporting System
This reporting system 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 Great Lakes Sea Grant Network. Created & maintained by Michigan Sea Grant and the MSU Remote Sensing & GIS Research and Outreach Services. Supported by MSU College of Agriculture and Natural Resources and MSU Extension.

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Click on a lake to view surface temperature maps.

Notice: The Great Lakes surface water temperature estimates presented in this website are automatically generated from satellite-derived sensors. Obvious errors or anomalies may be present in the resulting images as a result of satellite sensor malfunctions, adverse atmospheric conditions, or processing errors. Please notify us immediately about any errors or anomalies you observe in our products. Send your questions or concerns to

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