CARIBBEAN [Nevis]

Open Water Swimming in the Caribbean

Our first non-European venue, hosted in December as a winter escape on the island Nevis - includes potentially a double crossing of the Narrows, the 4km that separates Nevis and St.Kitts.

Nevis is our most adventurous location yet. This small volcanic island in the West Indies, neighbour to St Kitts and one of the most unspoilt in the Caribbean, offers some of the warmest, clearest water of any UltraSwim 33.3 venue. The Peak Edition started as a Founders' Pioneer event in December 2026 with a full event planned for the future.

You willswim 33.3km over four days in water that stays comfortably warm through December, around an island of exceptional natural beauty, based at the exclusive Four Seasons Resort.

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SEE OUR OTHER EVENTS

MONTENEGRO [Bay of Kotor]

from €1,729

MONTENEGRO [Bay of Kotor]
GREECE [Skopelos]

from €1,794

GREECE [Skopelos]
SWITZERLAND for Léman hope

from CHF 1,500

SWITZERLAND for Léman hope
RACECHECK|5.0
★★★★★

Based on 200+ reviews from swimmers around the world

Charlestown / Four Seasons Resort, Nevis

CARIBBEAN [Nevis]

26–27°C (79-81°F)

Book now

Places are limited and held on a first come basis. The booking team will confirm your spot and answer any questions.

common Questions

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When does the Nevis event take place?

The Peak Edition will be early December. See the Editions below for details.

How warm is the Caribbean water in December?

Water around Nevis in December averages about 26°C, the warmest of any UltraSwim 33.3 venue, with spectacular underwater visibility. Trade winds can bring some chop to the exposed Atlantic side, including the crossing of The Narrows

How many places are available?

Numbers are more limited by hotel space depending on category chosen than our European editions, book early!

How is it booked, and can I get a refund?

A payment of US$ 500  secures a place. See our full booking conditions for detail on cancellations - incredibly good rollover terms allow you to move what you've paid in full across to a future event if life throws you a curve ball.

Where will I be staying?

The modern embodiment of the spirit and soul of the Caribbean, this luxurious Four Seasons Nevis island Resort offers everything you need for the ultimate beach getaway. From the moment you arrive in Charlestown, Nevis, warm smiles welcome you to a paradise where the sun rises over Nevis Peak, casting a golden glow on the waters of two oceans that meet but never cross. Part of the charming two-island nation of St. Kitts and Nevis, a captivating blend of adventure, serenity and recreation is waiting to be discovered in Nevis 

UltraSwim 33.3 #17 Barcelona, Cami de Ronda coastal path on the Costa BravaUltraSwim 33.3 #17 Barcelona, Cami de Ronda coastal path on the Costa Brava

UNIQUE TO this event

  • Plan to swim the Narrows twice, the gap between St.Kitts and Nevis that separates Atlantic Ocean from Caribbean Sea
  • The warmest water of any of our events at an average of 26ºC
  • Our highest end hotel of any venue - 5* Four Seasons
  • The closest event for USA based swimmers - direct flights from New York and Miami daily in to St.Kitts
  • This event runs Wednesday to Saturday to time in with the popular and subsidised pricing London-St.Kitts British Airways route for those tight on time coming from Europe. Arrive Tuesday latest, departure Saturday afternoon possible from 1700.

Race formats

what formats are available at this venue?

33.3km

CLASSIC

The full English Channel distance spread across 4 days with 6 swims. The original. The one that started it all. Swims can vary from 2km to a marathon day 3 of 10-11km.

33.3 /2

BUILD

This 'Half Channel' non-competitive format aims to cover c. 17km over the same 4 days as the CLASSIC, but with all swims less than 5km. A great stepping stone to the full.

Packages and Pricing

4 package levels - but one world class delivery

Every package includes a full premium swim race experience over 4 days - the service package choice defines the extra support options like post-swim sports massage, the accommodation rating and room size, the airport transfers and many other extras.

ALL PACKAGES INCLUDE:

  • Hotel 4 nights twin shared accommodation including early breakfasts.
  • Pre-event training plan, training support channel and webinars
  • Finish line refuel lunches (excluding drinks)
  • Guided stretching sessions post race
  • Upcycled  Participation and Finisher's medal
  • Swimmer’s Pack (towel, water bottle)
  • Tow float and drybag loan (refundable €50 euro cash deposit to pay on collection)
  • Professional photos and video content
  • Group of 4 discount (4th swimmer half price) book at same time, including two new swimmers
  • Optional partner (F3, Family, Friends, Fans) supporter activity package, and accommodation package
ULTRA
Everything you need without the frills of the + packages
Everything listed above is included in the ULTRA package. It is important to note that you will be responsible for your own airport transfers except for Montenegro and Milos where they are exceptionally included.
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ULTRA+[4*]
Recommended
4* Hotel for four nights (shared accommodation, single occupancy available as an extra)

Dedicated airport transfers from/to airport to the event, except in Switzerland where there are fantastic train connections from Geneva and Zurich which make it easy for you to get to Lausanne.

Personal 1:1 Video Analysis pre-event (you must provide the video)

Swimmer’s Pack (towel or poncho, water bottle, woolly / sun hat, dry bag)

Post race sports massage (days 1-3)

Top sports injury physio on-site injury assessment (fee if further services required)

Single occupancy option guaranteed
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ULTRA+[5*]
All inclusive
All the benefits of the 4* Package

5* Hotel for four nights (single occupancy included in price)

Direct access to boutique hotels and upgrade options.
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ULTRA++
All inclusive
For the VIP experience, the ULTRA++ package, upgrades everything to a premium level.
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This comprehensive package includes everything from specialist coaching to luxury hotel accommodation, concierge service and dedicated support. It includes 5 nights of accommodation instead of 4 and includes a space on the F3 package for your partner.
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Email us for a personal consultation
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Event Format

HOW to get there?

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Where is it?

Nevis offers a truly unforgettable setting for an UltraSwim 33.3 event, combining the challenge of four days of open-water swimming with the warmth, character and natural beauty of the Caribbean. With its clear turquoise waters, dramatic volcanic landscape and spectacular views across the sea, swimmers experience an incredible environment both in and out of the water. Beyond the 33.3km challenge, Nevis invites swimmers and their families to slow down and explore — from historic sites and local villages to beaches, nature and the island’s rich culture. It is a destination where endurance meets adventure, creating an experience that extends far beyond the swim itself.

Getting there

From Europe, British Airways flies twice weekly, Saturdays and Tuesdays, from London Gatwick to St Kitts (SKB); alternatively fly Paris to St Maarten (SXM), then WinAir to Nevis (NEV). From the United States, direct flights run from New York JFK and Miami to St Kitts, with regional connections via St Maarten or St Thomas. From the airport, a taxi, a ten minute boat transfer and a five minute van bring you to the resort.

Nearby

  • Charlestown, with its Georgian colonial architecture
  • The former residence of Horatio Nelson
  • The birthplace of Alexander Hamilton
  • Nevis Peak and its rainforest slopes
  • The neighbouring island of St Kitts
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events

Choose your EVENT

Each running of this location has its own dates, price and booking. Pick the edition that suits you.

Open

#Nevis

"The Peak Edition"

2 - 5 December 2026

from US$4,500

Water Temperature: 26 - 27°C

Format available: 33.3 CLASSIC

View this event

Event Format

HOW DOES THE EVENT WORK?

Every event follows the same simple rhythm. A supported swim each morning, an easy afternoon to rest and explore, and evenings together with the group. It is this shape, repeated across four days, that turns 33.3km into something you build towards rather than survive.

Download the full event packEXPLORE THE FORMAT ›
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Start early, swim strong

Every edition follows the same simple rhythm over a long weekend. Early starts for the best weather and safety, a post swim refuel, recovery massage*, and return to the hotels for an easy afternoon to rest or explore, and evenings together cementing new friendships.

Build distance, build confidence

As the event progresses, distances build from 4km, with a marathon (10km+) swim on day 3 weather permitting - and what feels like a celebration c.4km final day course.  You'll be tired some days, you'll feel like superman on others - in the moments of doubt on or off the water, the group energy will carry you forward.

More than just a swim

The overall experience will mark you positively, and for many even life-changing and you'll give your very best whether you finish every leg or not. Our aim is to send you home a better swimmer, person or both.

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* ULTRA + / ++ packages only

All our events so far have won awards. See reviews from other swimmers.

Gold Award 2025 RaceCheckGold Award 2024 RaceCheckGold Award 2023 RaceCheckTop Rated 2024 RaceCheck

Our events

Seven events across six countries, all built around the iconic 33.3km English Channel distance.

GREECE [MILOS]

Swim the volcanic coastline of Milos in the Cyclades over four days of warm Aegean water. Dramatic sea caves, hidden coves and some of the clearest water in the series, in early June when the island is at its best.

Discover event

Switzerland for léman hope

A 33.3km 4-day event including a crossing of Lake Geneva, from France to Switzerland, in one of the world's most iconic freshwater settings. Warm, flat water and a dramatic Alpine backdrop.

Discover event

Greece [Skopelos]

Swim the island-hopping route through the Northern Sporades, one of the most beautiful corners of the Aegean, with warm late-summer water and golden light that makes every session memorable.

Discover event

Montenegro [Bay of Kotor]

The founders' favourite. The Bay of Kotor combines warm, sheltered water with a UNESCO World Heritage setting that stops swimmers mid-stroke. Warm swimming well into October.

Discover event

Barcelona [Costa Brava]

Pioneer edition

The first UltraSwim 33.3 along the Costa Brava, one of Europe's most dramatic coastlines. Warm Mediterranean water into late autumn and a host city that needs no introduction.

Discover event

Caribbean [Nevis]

Pioneer edition

The first UltraSwim 33.3 in the western hemisphere. Turquoise Caribbean water, a historic volcanic island, and a sunrise-to-sunset rhythm that will stay with you for life.

Discover event

Croatia [Hvar]

Completed 2026

Three sold out years swimming from Stari Grad to Hvar Town through secret bays and clear Adriatic water. The Islands Edition pauses for 2027.

Discover event