Calshot is a coastal village in Hampshire, England, at the west corner of Southampton Water where it joins the Solent.

[2] Its strategic importance continues to the present day, and there is still a military presence in Calshot, though the castle is no longer a manned fort.

Most of the islanders returned home, but some of the families decided to stay and remain a close-knit community centred on a complex of 50 houses called Tristan Close.

The original hangar from the World War II flying boats remains as an activity centre for watersports (including kite-surfing), climbing, snowboarding and track cycling.

The Habitats Directive Review of Consents for the Solent Maritime Special Area of Conservation (SAC) did indeed identify thermal pollution on the intertidal zone on the west shore of Southampton Water, but this is likely to be from more than this one source.