Where can you actually swim in Réunion Island

The short list of places to get in the water

Once you accept that swimming in Réunion isn’t a free-for-all along the coastline, the next question is simpler: where does it actually work. The honest answer is a short list, and it’s almost entirely on the west and south coasts, inside the lagoon protected by the coral reef, or in a handful of surveyed zones elsewhere. I’ve swum at most of these more than once, on different trips, in different seasons, so this is less a brochure list than notes on what each spot is actually like once you’re standing on the sand.

Saint-Gilles-les-Bains and l’Hermitage: the easy, family lagoon

This is where most visitors end up, and for good reason. The lagoon at Saint-Gilles is wide, shallow near the shore, and calm almost all year, protected by the barrier reef a few hundred metres out. It’s also the most watched stretch of coast on the island, with lifeguard posts during the day. Walk fifteen minutes north along the sand and you’re at l’Hermitage, part of the same reef system but with fewer people and more shade from the filao trees behind the beach. Both are good for young kids who can’t yet swim confidently, and both are the easiest place to try snorkeling for the first time; the water clarity here is better than almost anywhere else on the island. See things to do in Saint-Gilles and the lagoon snorkeling and kayaking guide for what’s actually worth doing once you’re in the water.

La Saline-les-Bains: quieter, same reef

A little further south, La Saline-les-Bains sits on the same protected lagoon but draws a thinner crowd, mostly locals and people staying in the small hotels nearby rather than day-trip groups. The water is just as calm. It’s a reasonable choice if Saint-Gilles feels too busy in the middle of the day, without changing the type of experience you get.

Saint-Leu: swimming in front, surfing further along

Saint-Leu has its own lagoon in front of the town, sheltered enough for swimming and snorkeling, and separate from the surf spots further along the same reef where the waves get serious. Don’t confuse the two: the swimming zone is close to the boat ramp and the main beach, not out toward the breaks that made Saint-Leu one of Europe’s best paragliding-over-a-surf-town combinations. The snorkeling and surfing guide and the scuba diving guide for Saint-Leu and l’Étang-Salé both draw that line clearly, which is worth reading before you just wade in anywhere that looks quiet.

L’Étang-Salé: black sand, a rougher edge

This is the most different of the West Coast options. The sand is black, volcanic, and hot enough by midday that sandals matter, and the surveyed swimming section has a livelier current than the Saint-Gilles lagoon. It doesn’t feel like a resort beach, and I’d send confident swimmers here before I’d send young children. The forest right behind the beach is also worth a walk if you want shade between swims. It sits within the broader south area, alongside Grand Anse, which has its own amenaged tidal pool rather than open lagoon swimming.

Saint-Pierre: a city beach, not a resort one

In Saint-Pierre, swimming concentrates around the Ravine Blanche area and the surveyed lagoon strip near the marina. It’s a working southern town more than a beach destination, so the water here is a break between the market and the nightlife rather than the main event of the day. Useful if you’re based in the south and don’t want to drive back up the west coast every time you want to cool off; see things to do in Saint-Pierre.

What ties these spots together, and the reef you’re swimming over

Every one of these places sits inside or beside the marine nature reserve that protects Réunion’s fringing reef, created in 2007 to slow the damage that coastal development and heavy visitor numbers had already started. The coral here grows slowly, and it doesn’t take much to hurt it: a foot put down to steady yourself, a fin dragged across a shallow patch, sunscreen that isn’t reef-safe washing off by the thousand. None of that is dramatic in the moment, which is exactly why it adds up. Float rather than stand when you’re over coral, keep a few metres of clearance, and switch to a mineral or reef-safe sunscreen before you go in; it’s a small habit that costs nothing on a trip like this.

If you want to see the reef properly rather than just float above it, snorkeling with turtles in Saint-Gilles-les-Bains is the easiest way in, and there’s an organised version of it worth booking directly:

a guided snorkeling trip to see green turtles in the Saint-Gilles lagoon

For a bigger-picture view of the coastline you’ve just been swimming along, boats also head out from the same port for whale and dolphin watching in season, roughly June to October:

a boat trip from Saint-Gilles to spot dolphins and, in season, humpback whales

Planning around the lagoon rather than the whole coast

The practical shift, once you’ve mapped these spots, is to stop thinking of Réunion’s coastline as one long beach and start thinking of it as a handful of protected pockets connected by coast you look at rather than swim from. That changes how you plan a day: base yourself near one lagoon, don’t chase open coastline hoping for a quiet cove that doesn’t exist here, and treat the drive between zones as sightseeing rather than a search for a better beach. The west coast gives you the widest choice within a short drive, which is one reason most first stays cluster around Saint-Gilles.

For the wider safety picture behind why these zones exist and others are off-limits, that’s covered properly in is it safe to swim in Réunion: sharks and beaches and where can you swim in Réunion Island, the safety rules; this page is deliberately the practical follow-up, the list of where to actually go once you know why the rest of the coast is closed. If you’re still building your itinerary, the best beaches in Réunion Island guide and the first-time visitors guide fill in the rest, and the snorkeling and lagoon activities category lists what’s bookable at each spot above.

Where can you swim in Réunion Island: quick answers

Where can you swim safely in Réunion Island?

Inside the lagoon protected by the coral reef on the west coast, from Saint-Gilles-les-Bains and l’Hermitage down to La Saline-les-Bains, plus Saint-Leu, the black-sand beach at l’Étang-Salé, and surveyed zones in Saint-Pierre. Elsewhere, swimming and water sports are restricted by prefectural order.

Is Saint-Gilles-les-Bains good for swimming with kids?

Yes. The lagoon there is shallow, calm, and watched over most of the day, which is why it’s the busiest family beach on the island. Pair it with l’Hermitage next door for a quieter stretch of the same reef.

Can you swim at l’Étang-Salé?

You can, in the surveyed section of the black-sand beach, though the current is stronger than in the Saint-Gilles lagoon and the atmosphere is less protected and more local.

Is Saint-Leu a swimming spot or a surfing spot?

Both, but in different places. The lagoon in front of town has a swimming and snorkeling area; the surf breaks further along the reef are for boards, not casual swimming.

Where do people swim in Saint-Pierre?

At Ravine Blanche and the town’s surveyed lagoon area near the marina, not along the open Sud sauvage coastline further east.

Can you walk on the coral in the lagoon?

No. The reef inside the marine nature reserve is fragile and slow-growing; standing or walking on it damages coral that took decades to form.

Do I need reef-safe sunscreen in Réunion’s lagoon?

It’s strongly recommended. Standard sunscreens contain compounds that stress coral, and the reserve’s health depends on visitors using reef-safe formulas.

Is the water warm year-round?

It stays swimmable through both seasons, warmest during the November-to-April austral summer and a few degrees cooler but still pleasant during the May-to-October austral winter.