National Weather Service United States Department of Commerce
Marine Forecasts
Few people are affected more by weather than the mariner. An unexpected change in winds, seas, or visibility can reduce the efficiency of marine operations and threaten the safety of a vessel and its crew. The National Weather Service (NWS), a part of the National Oceanic and Atmospheric Administration (NOAA), provides marine warnings and forecasts to serve all mariners who use the waters for livelihood or recreation.

The National Weather Service office in Chicago is responsible for the Lake Michigan forecast and the Nearshore Marine forecast for the Illinois and Indiana shores. We also issue warnings for short-term events like thunderstorms.

Click on the image to get to the website

Great Lakes Marine Portal

Click to see the latest Special Marine Warning  or Marine Weather Statement !

Open Lakes Forecasts:  

Nearshore Marine Forecast:
Click here to get the Nearshore forecast for the Illinois and Indiana Waters of Lake Michigan
Great Lakes Nearshore forecasts
click on Map to get forecast for all of Great Lakes