The Florida Keys have some great spots for strolling, lounging and relaxing, but will probably be packed until mid April. Don't know anywhere that will be guaranteed warmth through March. Just about all places get cold snaps from time to time then. Even Hawaii is getting some record low temps now. You rarely see 50's there at sea level, on any of the islands. Of course at high altitudes, it can be very cold. Our son lives on the Big Island and he sent this today:
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