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Beluga Whales Join now to read essay Beluga Whales A. Swimming. 1. In general, beluga whales are slow swimmers. They commonly swim about 3 to 9 kph (1.9-5.6 mph). They are, however, capable of sustaining a maximum speed of 22 kph (13.6 mph) for as long as 15 minutes (Nowak, 1991; Ridgway and Harrison, 1981)..