Jersey is the largest of the Channel Islands lying aproximately 160km off the south coast of England in the bay of St. Malo. Due to its location, Jersey is subject to a huge tidal range and with influence from the Gulf Stream it is subject to very rich marine life some of which is not found in waters surrounding the British mainland.

The island itself lies on a plateau, which until you are several miles offshore does not reach much more than 30m (100ft) in depth and is mainly characterised by bedrock. The shores of the island provide divers with an outstanding array of diverse underwater life, the most common of these being that of Bouley Bay situated on the north coast of the island.

During the summer months the waters surrounding the island become warm with average temperatures reaching 18 degrees celcius. The summer season also provides divers and swimmers alike with excellent visibility. Diving off the shore is relatively safe in most bays however, extreme caution must be exercised when diving off boats or outside the bays as during mid-tide currents can reach up to several knots.