I Second Mike comment, I've got that link (bouy 44013 - Boston)in an "active window" on my windows desktop that refreshes hourly. It's a must have data for a smaller - or any - boat.
You can also get Wave Height, Water temp and other cool info such as graphs of wind speed for th last 24 hours like this:
<img src= "http://www.ndbc.noaa.gov/plot_param.phtml?$station=44013$wspd">
Are we all getting bored early this season??