NOAA Weather Links

NOAA Marine Forecasts
National Data Buoy Center
Dial a Buoy
Chicago area Marine Forecasts
NOAA Ocean Prediction Center Product Loops
Webcam views of L. Michigan shot from Door Co. north of Sturgeon Bay
View of Mackinac Bridge
View of St. Joseph, MI's lakefront.

And if you liked those, you're bound to enjoy this comprehensive list of weather cams from weatherimages.org.

The NIMA site includes numerous navigational warnings and aids.