According to the United States Census Bureau , the town has a total area of 3.5 square miles ( 9.2 kmÂ ) . About 2.7 square miles ( 7.1 kmÂ ) of it is land and 0.8 square miles ( 2.1 kmÂ ) of it ( 22.82 % ) is water . According to the United States Census Bureau , the town has a total area of 3.5 square miles ( 9.2 kmÂ ) , of which , 2.7 square miles ( 7.1 kmÂ ) of it is land and 0.8 square miles ( 2.1 kmÂ ) of it ( 22.82 % ) is water .