Coordinates: 50°48′59″N 1°18′23″W / 50.816272°N 1.306495°W
Calshot Spit is a one-mile long sand and shingle bank, near the village of Calshot, located on the southern bank of the open end of Southampton Water, on the south coast of England.
At the end of the spit are Calshot Castle (built by King Henry VIII), an RNLI lifeboat, an NCI station, several slipways, a former Royal Navy and Royal Air Force flying boat station and Calshot Activities Centre. The neck of the spit is owned by New Forest District Council while the end of the spit is owned by the Crown Estate which leases it to Hampshire County Council.
There are spectacular views at night of Fawley Refinery lit up. On a clear day, the Spinnaker Tower in Portsmouth can be seen to the east, the decommissioned Fawley Power Station to the northwest, and the Hamble estuary to the north.