The first person to kayak solo around Britain and Ireland completed the
2,700-mile (4,345km) trip on Thursday.
Ms Whitehead travelled 2,700 miles in her kayak
Fiona Whitehead, 34, paddled into Gunwharf Quays Marina in Portsmouth,
Hampshire, after the five-month trip.
Ms Whitehead, who is now based in Aberdovey, north Wales, set off from her home town of Portsmouth on 9 April.
Arriving back, Ms Whitehead said: "I'm still trying to let everything sink in. I can't believe that I've finished. The whole experience has been phenomenal."
Ms Whitehead began the trip by crossing the Irish Sea, paddling into the Atlantic and around the west coast of
She then crossed the Irish Sea again and headed down through the North Sea, before the final leg through the English Channel and back into Portsmouth.
She said: "There were so many different high points.
"I saw an orca whale which was absolutely stunning and just playing 300 metres in front of me.
"It was leaping out of the water and landing on its back.
"I had spectacular displays of dolphins, otters, all sorts of amazing things.
"I didn't know if I could take that much splendour of the environment."
Ms Whitehead, who is a senior instructor for the Outward Bound Wales at Aberdovey, raised about £2,400 for charity by completing the trip.
The cash will be split between the Royal National Lifeboat Institution and the Patey Day Centre, in Portsmouth, a day centre for Alzheimer's sufferers.
Ms Whitehead's grandmother had Alzheimer's and was a regular visitor to the day centre until she died last September.