Sands Point Seaplane Base (FAA LID: 7N3) is a seaplane landing area in Manhasset Bay, situated two miles (3 km) northwest of downtown Port Washington in the Town of North Hempstead, in Nassau County, Long Island, New York, United States.

[5][6][7] Between 1939 and 1940, Port Washington was the New York base of Pan American World Airways' transatlantic Boeing 314 flights, prior to the opening of LaGuardia Airport's Marine Air Terminal.

[13][15][16] The current iteration of the seaplane base was activated in May 1948, around which time the original hangar and terminal area was abandoned.

[18][19][20][21] Seaplanes are able to dock in Manhasset Bay, with the Port Washington Water Taxi ferrying pilots and passengers to and from the shore.

[19] On January 21, 1939, An Imperial Airways Short S.23 Empire Flying Boat Mk II (registration G-ADUU), en-route from Port Washington to Bermuda, ditched into the Atlantic Ocean during severe weather; the aircraft had experienced catastrophic engine failures, which had been caused by the accumulation of ice on the carburetor.