Sea Level is a really helpful site that collects 'links to the concrete coast' – in other words, anything that has to do with water activities. You'll find resources for boating, kayaking, rowing, swimming,
surfing, conditions, gear, and more. I love the sea, boats, and water (though I'll admit to being the swimmer)
Next on my list of things to do is swimming lessons.

Check out http://sealevel.typepad.com/sealevelny/