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Nearshore Marine Zone Forecasts by the Chicago, IL Forecast Office - click on the area of interest

map showing marine forecast zones near Chicago, IL

Nearshore Marine Forecast which includes all these zones

Special Marine Warning(s) and Marine Weather Statement(s) for these zones

Marine Weather Message for these zones

Surf Zone Forecast

Open Lake Forecast for Lake Michigan      (all zones)   (individual zones)   (Synopsis/MAFOR only)

NDFD Marine Graphics for these zones from which the text forecasts are generated

Great Lakes Marine Weather Portal - Includes point forecasts

Great Lakes Water Level Data

Great Lakes nearshore forecasts are subdivided by zone, each identified by text description and a Universal Generic Code (UGC). The different colors used in the map above have no meaning and are only intended to assist in differentiating the zones.

Great Lakes nearshore marine forecasts are issued throughout the boating season, typically beginning around April 1 and ending around December 31, dependent on ice conditions on the entrances to each individual lake. During periods of climatological extremes leading to erratic ice coverage patterns (shifting of ice edge, late/early freeze, etc.), and based on customer needs, nearshore forecasts may be issued throughout the winter to support the National Weather Service mission of protecting life and property on the waters of the Great Lakes.

These forecasts are also available via e-mail

NOTICE - Check time and date of forecasts. Linked data may not represent the latest forecast.

NWS Internet is available 24 hours a day, seven days a week . Timely delivery of data and products through the Internet is not guaranteed. Official NWS dissemination systems which can provide timely delivery of data and products are listed in our DISCLAIMER

Visit the Chicago, IL Forecast Office which provides links to additional products as well as regionally focused information such as point-specific marine forecasts, predicted tides and buoy observations.

Text Interface Version of this page.LMZ740: Winthrop Harbor to Wilmette Harbor IL LMZ741: Wilmette Harbor to Northerly Island, IL LMZ742: Northerly Island to Calumet Harbor IL LMZ743: Calumet Harbor IL to Gary IN LMZ744: Gary to Burns Harbor IN LMZ745: Burns Harbor to Michigan City IN LMZ740: Winthrop Harbor to Wilmette Harbor IL LMZ741: Wilmette Harbor to Northerly Island, IL LMZ742: Northerly Island to Calumet Harbor IL LMZ743: Calumet Harbor IL to Gary IN LMZ744: Gary to Burns Harbor IN LMZ745: Burns Harbor to Michigan City IN