Find your buoy and see the real-time data. Access data about wind, waves, water temperature, phosphorous, chlorophyll a, and more.

Harmful algal blooms are a concern around the Great Lakes, but especially in western Lake Erie, where they sometimes threaten drinking water supplies. Learn what we and partners are doing so people stay safe.

The GLOS Data Portal provides access to near-realtime and archived observations and the ability to model forecasts for the Great Lakes. This includes lake conditions, water levels, wave heights, air and water temperatures and more. Receive updates from the station or buoy of your choice, and even download data from the site.