Fairwater may refer to:
- Fairwater, Cardiff, Wales
- Fairwater (Cardiff electoral ward)
- Fairwater railway station
- Fairwater, Double Bay, a heritage-listed house in Double Bay, Sydney, Australia
- Fairwater, Torfaen, Wales
- Fairwater, Wisconsin, U.S.A.
- , a ship
- Sail (submarine), a vertical extension on most submarines that houses the periscopes, masts, and in some cases the conning tower
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