The all weather lifeboat was launched after a report of a kayaker was seen in difficulty in the water off Hove Lagoon.
Coastguard Rescue Teams from Newhaven and Shoreham joined the search as well as the Brighton lifeboat, the Shoreham inshore lifeboat and a Coastguard rescue helicopter. A kayak and paddle were found ashore in the area and a 10-hour long air and sea search was carried out to find the missing kayak.
The crews and teams searched from Brighton Pier along the coast to Worthing. No one was found and HM Coastguard called off the search at 9pm as darkness fell.