The Tempest is a one design two man high performance keelboat with a trapeze. It was designed by Ian Proctor for the 1965 trials for the new Olympic Keelboat, which it won convincingly. The class has since progressed with the times, including a new deck and cockpit layout and changing the construction from GRP to a foam sandwich. In the last few years the rules have allowed a bigger spinnaker, longer spinnaker pole and the use of epoxy resin in the construction of the hull.