The weather on Topsail Island, NC is always good enough for a beach vacation! Mild ocean temperatures provide for many months of swimming and other Topsail Island beach activities. In the summer, the ocean is usually cooler than the air, so our temperatures on the beach are several degrees cooler than the mainland - not to mention the refreshing breezes and smells of salt air. Use our guide below to help you pack for your Topsail vacation and see the weekly forecast if you are on your way down to North Carolina's best kept secret, Topsail Island.