The lifeboat was launched at 4.10pm on Saturday following a report of an overdue boardsailor from Seasalter Sailing Club.
The UK Coastguard Search and Rescue Helicopter from Lydd which had been in the area was already searching off Shellness, Isle of Sheppey.
The lifeboat arrived at the scene and commenced a search westwards into the Swale.
Whilst the lifeboat was off Harty the boardsailor was located safe onshore and all units were stood down to return to station.
Weather conditions: WSW 4-5 winds.
This was the 17th call of the year.
Crew: Richard Judge (Helmsman) Dave Parry, Craig Sidders, Jay Collins.
Launchers: Mark Sidders (tractor) Richard Curtis, Alex Q