Do I need to bring my own swimming gear?

Swim Together does not provide equipment, so you should bring your own wetsuit, goggles, and swim cap.

Is the swim suitable for beginners?

Yes, sessions are tailored to different skill levels with appropriate route distances and guidance.

What is the water temperature like throughout the year?

Water temperatures range from around 15ºC in winter to up to 22ºC in summer.

Where does the swim start and finish?

All sessions start and finish at Praia da Duquesa, allowing easy beach access before and after your swim.

Are safety measures in place during the swim?

Yes, the swim is accompanied by experienced guides and includes personal accident insurance for all participants.

Can the swim session be part of a triathlon training day?

Absolutely, the swim is designed to complement your triathlon preparation, especially as part of transitioning to cycling or running.

Open Water Swim in Cascais with Swim Together | Water Activities

Cascais Bay, just west of Lisbon, Portugal, offers an open-water swimming experience that’s as invigorating as it is scenic. Swim Together leads one-hour sessions that trace parts of the Ironman Cascais triathlon swimming course, set against a backdrop of historic coastal architecture and the Atlantic’s crisp waters. Here, swimmers glide past centuries-old fortresses and grand seaside homes, the kind of landmarks that anchor this region’s unique maritime heritage.

What sets this swim apart is how it tailors the experience to your ability—whether you’re a novice open-water swimmer or training for your next triathlon. Starting at Praia da Duquesa, the route follows protected stretches of Cascais Bay, renowned for calm, clear water and rolling coastal views. Water temperatures range between 15ºC and 22ºC, accommodating a wide range of swimmers who want to hone their technique under expert guidance.

Swim Together’s team of seasoned professionals ensures safety and support throughout the session, including personal accident insurance and on-water guides familiar with local conditions. Their approach blends performance training with the enjoyment of Portugal’s rugged coastal charm. Unlike crowded public beaches, this experience offers an intimate connection to the water and landscape, making it a standout addition to Cascais’ growing outdoor recreation scene.

The opportunity to swim alongside historic fortifications and innovative Ironman course design speaks to Cascais’ evolution from a traditional fishing village to a modern hub for water sports and endurance events. After the swim, you finish right on the sand at Praia da Duquesa, with access to fresh water for rinsing and an easy transition onto your cycling or running leg if you’re gearing up for a full triathlon day.

For travelers based in Lisbon looking to break out of urban life with coastal adventure, Swim Together taps into the best of the region’s natural and cultural assets, making it a must-do for open water enthusiasts and triathletes alike.

About Swim Together

Swim Together is a specialist operator offering guided open‑water swimming tours and multi‑day swim camps across Portugal and São Tomé and Príncipe. The company curates coastal and island swim experiences that range from half‑day cave and coastline swims to a seven‑day swim camp in São Tomé and Príncipe. Trips include cave explorations (Benagil, Lagos, Sagres), protected marine reserves (Garajau), island coastlines (Madeira, Ponta São Lourenço), and sandy Algarve beaches. Many experiences are led by experienced instructors and local guides who tailor routes to swimmer skill levels and safety conditions.

Swim Together focuses on accessible, skill‑based open‑water sessions, combining navigation of sea caves, guided coastal swims, boat transfers, and onshore returns. Several tours include opportunities to spot marine life and dolphins, and some multi‑day itineraries feature cultural exploration, hiking to waterfalls, local cuisine, and wildlife events such as the release of baby turtles. The São Tomé and Príncipe Swim Camp includes an equator crossing experience and immersive island activities.

Service offerings are factual and clearly described per trip: half‑day tours, full‑day beach and cave adventures, boat returns, and week‑long swim camps. Routes and distances (for example, multi‑kilometre cave swims around Ponte da Piedade and Benagil) are presented within trip details so swimmers can assess suitability. Booking information, meeting points, and required equipment are specified in each trip listing. Swim Together presents a focused portfolio for travelers seeking guided open‑water swimming and coastal exploration in Portugal and São Tomé and Príncipe. Trip difficulty levels and safety protocols are listed per excursion online.