Guide
The Mar Menor: Europe's largest saltwater lagoon
22 kilometres long, 3 to 7 metres deep, warmer than the open sea and almost wave-free. Here's everything you need to know before you visit.
The Mar Menor is the largest saltwater lagoon in Europe, 22 km long, 3 to 7 metres deep, separated from the Mediterranean by the La Manga sandbar. The water is shallow, warm (28–30°C in summer, 14–16°C in winter), and almost wave-free, which makes it Spain's safest stretch of coast for small children and beginner sailors.
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What is the Mar Menor?
The Mar Menor, literally the smaller sea, is a saltwater lagoon on the southeast coast of Spain in the Murcia region. It is separated from the Mediterranean by La Manga, a 22-km sandbar, and is the largest saltwater lagoon in Europe. La Manga
Because it is shallow, the water warms faster than the open sea and stays calm. There are no real waves and no tides, which makes it ideal for families, beginner sailors and older swimmers, but also ecologically vulnerable.
Is it safe to swim?
Yes, generally. The lagoon suffered ecological crises in 2016 and 2021, but regional restrictions have helped recovery. As of late 2025, swimming is safe at the main beaches; check local water-quality notices and avoid swimming for 24 hours after heavy rain.
Water temperature by month
The lagoon warms and cools faster than the Mediterranean. From May to October most visitors swim happily; November and April are for the brave.
- Jan14°C
- Feb13°C
- Mar14°C
- Apr16°C
- May19°C
- Jun23°C
- Jul26°C
- Aug27°C
- Sep25°C
- Oct22°C
- Nov18°C
- Dec15°C
The lagoon warms and cools faster than the Mediterranean. From May to October most visitors swim happily; November and April are for the brave.
Wildlife
Flamingos are present year-round in the San Pedro del Pinatar salt flats. The lagoon shallows also support seahorses, octopus and saltwater shrimp, while Calblanque has wild beaches and occasional dolphin sightings. San Pedro del Pinatar
Best beaches around the lagoon
Playa de la Concha
Main town beach, lifeguarded in summer, with cafés along the promenade and calm water for easy swimming.
Open in Maps →Playa del Espejo
Quieter than La Concha, with shaded picnic areas behind the sand.
Open in Maps →Playa de Las Salinas
Long flat beach with very shallow water, excellent for small children and windsurfing lessons.
Open in Maps →La Manga del Mar Menor
The 22-km sandbar where you can have lagoon and Mediterranean beaches in one afternoon.
Open in Maps →Playa de Los Nietos
Small fishing-village beach with seafood restaurants right behind the sand.
Open in Maps →Things to do on the lagoon
Sailing, windsurfing, kayaking, paddleboarding, kitesurfing, flamingo-spotting, Lo Pagán mud baths, cycling the Vía Verde and eating caldero by the water.
Sailing (CN Los Alcázares)
Year-round school with Optimist, Laser and adult dinghy courses.
Windsurfing & wing foiling
Calm training water with schools in Los Alcázares and Los Urrutias.
Paddleboard & kayak hire
Hourly rentals on the town beach in summer.
Flamingo & birdwatching
San Pedro del Pinatar salt flats, 10 minutes away and free.
Calblanque coastal walk
Wild Mediterranean coastline on the southern edge of the lagoon.
Cycling the Vía Verde
Flat lagoon-side rail trail with bike hire in town.
Best villages on the lagoon
- Los Alcázares - our village, with the best Tuesday market and calm northern beaches.
- Santiago de la Ribera - 10 min north, larger and busier with shops and the Air Force academy.
- San Pedro del Pinatar - salt flats, mud baths and fishing port.
- La Manga - the sandbar resort strip with sea on both sides.
- Cabo de Palos - fishing village with excellent seafood.
- Los Urrutias / Los Nietos - quiet southern-shore villages popular with locals.
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