Seasonaire
A Seasonaire is a person who lives in multiple locations during different "Seasons" of the year. Seasonaire locations are generally East Coast Island communities such as: Cape Cod, Nantucket, Martha's Vineyard, The Hamptons and Palm Beach.
"He is such a Seasonaire, He'll be in Palm Beach from December till May, then Nantucket till June then spend the rest of the summer in the Hamptons."