Marine Weather Data and Forecasts
Northeast Wisconsin and Lakeshore Hourly Weather Roundup
Wisconsin Hourly Weather Roundup
Lake Michigan Coast Guard
Western Great Lakes Buoy and C-Man Data
Western Great Lakes Buoy, C-Man, and Ship Obs -- Note dates in Julian
Other Buoy and C-Man Sites
National Ocean Service Observations -- Water levels and weather observations
Western Great Lakes Ice Analysis -- Courtesy National Ice Center
Lake Michigan Surface Temperature Analysis
Great Lakes Surface Temperature Analysis
Great Lakes Water Levels
Eastern Wisconsin and Lk Michigan Surface Plot
Lake Winnebago Info -- Courtesy USACE - Water flows and levels
Northwest Lk Michigan Nearshore -- Including Green Bay
North Lk Michigan Nearshore -- Including far northern Green Bay
Southwest Lk Michigan Nearshore -- Including Milwaukee shore
Lk Michigan Open Waters -- Beyond 5 nm from shore
Graphical Forecast -- Including nearshore wind and wave
Model Forecast -- Great Lakes Coastal Forecasting System
Model Forecast -- NOAA WAVEWATCH III - Wind and waves
Marine Weather Message -- NW Lk Mich including Green Bay
All of Great Lakes
Great Lakes Weather Observations and Forecasts
Information for the Marine Community
About the Program
The National Weather Service in Green Bay issues forecasts and warnings for a part of northwest Lake Michigan, including the Bay of Green Bay.
The Nearshore Marine Forecast is for waters within 5 nautical miles from shore, and contains a forecast of wave heights, wind and weather out to 48 hours. The Nearshore Marine Forecast is issued year round for much of the lake.
A Special Marine Warning is issued when hazardous weather conditions of short duration, such as those associated with thunderstorms, are expected to produce winds of 34 knots or more.
Lakeshore and Coast Guard Observations are collected and broadcast hourly on the Green Bay and Sister Bay NOAA Weather Radio stations.