Deep Water is a 2006 British documentary film directed by Jerry Rothwell and Louise Osmond, and produced by Al Morrow, Jonny Persey and John Smithson.

It is based on the true story of British businessman and amateur sailor Donald Crowhurst, as he participated in the Sunday Times Golden Globe Race, a single-handed, round-the-world yacht race held in 1968–69, during which he disappeared.

Smithson had previously produced the successful British documentary, Touching the Void (2003).

The official poster quotes The Daily Telegraph, 'A movie which will reduce the hardest of hearts to a shipwreck'.

Variety said "As it explores the limits of human endurance, the pic should suck even land-lubbers into a whirlpool of gripping adventure, overblown ambitions and sheer human folly".