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Kayakers and swimmer walk across the Isles of Scilly

The Scilly Swim Challenge

  • 17 Sep – 20 Sep 2026
  • Isles of Scilly, UK & Channel Islands
View dates & book
One of the UK's most iconic open water swimming adventures, the sell-out Scilly Swim Challenge happens in September every year. It is a breathtaking 15km island-hopping journey across the sparkling waters of the Isles of Scilly, completed over one or two unforgettable days.
Distance per day
7-15km
Water temperature
13-16°C
Ability level
Challenger
Swim type
Sea

Combining exhilarating sea swims with short walks between islands, this is an unforgettable shared adventure through some of Britain’s most breathtaking coastal scenery.

With white-sand beaches, turquoise seas, expert safety support and an unrivalled community atmosphere, the Scilly Swim Challenge offers the perfect blend of challenge, exploration and pure swimming joy. It’s the kind of event that stays with you long after you’ve left the islands. Many return year after year.

Swimmers gather for a safety briefing at Scilly Swim Challenge
Kayakers and swimmer walk across the Isles of Scilly

Highlights

Swimmers shake hands at the end of a swim in the Isles of Scilly
Arrive as strangers, leave as friends

There's something special about sharing an adventure - Scilly swimmers are a supportive and welcoming community. Whether you join with friends or come on your own, the Scilly Swim Challenge creates connections that last.

Scilly Swim Challenge crew
Celebration from start to finish

From the acclimatisation swim the evening before to the post-event party with live music, local beer and food - this is as much a festival as it is a swim.

A view from the water

We may be biased, but the Isles of Scilly have to be seen to be believed - and we think an aquatic perspective is the best possible way of experiencing this magical part of the UK.

The UK's friendliest swim!

There are no prizes for coming first. But! We do have a prize for the friendliest swimmer. So get those smiles ready.

Dates & book

  • 17 – 20 Sep 2026 (3 nights)
    Enquire

Visit the Scilly Swim Challenge Website

For full information, visit the Scilly Swim Challenge website. Our 2026 events are now full. 2027 dates and booking will be released in autumn.

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