I like wunderground dot com. It has local forcast for various towns in ri by zip code. It also has a link to marine forcasts for the bay, RI sound, and BI sound. If you have a smart phone to access web pages, you can also look at animated radar. Handy for telling if that dark cloud you see is just dark or an approaching line of thunder storms. You can also try www.co-ops.nos.noaa.gov/nbports/nbAllMET.html
That website has current wind speed for various parts of the bay. If the wind is up and against the tide, expect a chop!