There are up to 10 Tempests out frequently at ullswater making it one of the best classes to sail for competitive class racing. 

The Tempest is a keelboat designed by Ian Proctor. The Tempest has an unusual aspect in that it is a keelboat but also has a trapeze, a rigging element usually only found on certain dinghies. As a result the Tempest is just as exciting to sail as fast dinghies, but is much more forgiving and is unable to be capsized. Due to the planing hull shape and large sailplan, the Tempest is remarkably fast when sailing on a reach, and speeds in excess of 15 kts are not uncommon in moderate winds.

Tempests are sailed actively throughout the world with fleets in Germany, France, Switzerland, Austria, United Kingdom, North America and Australia.