Sag Harbor 6th Annual HarborFrost 2016 …. Get Your Freeze On! The Sag Harbor chamber of Commerce is hosting The 6th Annual HARBORFROST February 27TH 2016in Sag Harbor, New York. Who’s ready to get your freeze on for the Frosty Plunge? A benefit for the Sag Harbor Ambulance Corp. Registration at the Windmill Beach at ...