Mar de las Calmas

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Mar de las Calmas

Nature Reserve

Mar de las Calmas is a protected marine area off La Restinga on the southern tip of El Hierro, visited for its clear water, volcanic seabed and excellent snorkel and dive sites.

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Mar de las Calmas essentials

Address: La Restinga, El Hierro, Canary Islands, Spain

Mar de las Calmas is a designated protected area and Site of Community Importance centred on the waters around La Restinga, a small fishing village at El Hierro’s southern tip. The reserve protects a volcanic seabed, steep underwater relief and a variety of marine habitats important for local biodiversity.

The setting is volcanic and dramatic: black lava shores give way quickly to deep water, and underwater you can find rocky outcrops, caverns and lava formations rather than long sand flats. The combination of clear, warm seas and complex seabed structure attracts snorkelers, recreational divers and scientific interest.

Visiting is low-key: La Restinga has basic services and a handful of local operators offering boat trips, guided dives and equipment hire. Because the area is protected there may be local rules and sensitive zones - check local guidance before entering the water.

  • La Restinga coastline: The small fishing village and its black-lava shore provide beach access, boat launches and a relaxed base for exploring the marine reserve.
  • Underwater volcanic formations: Diving and snorkelling reveal lava cliffs, caves and seabed relief formed by volcanic activity.
  • Rich marine life: Clear waters around the reserve host a varied community of fish, rays and invertebrates adapted to rocky, volcanic habitats.
  • Boat trips and shore dives: Short boat rides or shore entries take you to a number of protected dive and snorkel sites close to La Restinga.
Things to Do
When to Go

Best Time to Visit Mar de las Calmas#

El Hierro has mild, arid subtropical conditions and Mar de las Calmas can be visited year-round, but sea conditions and visibility vary with the seasons.

Winter (milder, wetter)
November - February · 15°C - 25°C (59°F - 77°F)
This period brings the most rainfall and occasional choppier seas, so some boat trips or shore entries may be affected; services in the village can also be quieter.
Spring (good)
March - May · 15°C - 24°C (59°F - 75°F)
Sea conditions often become calmer and visibility improves, making this a reliable shoulder season for snorkelling and diving.
Summer (best for calm seas)
June - October · 18°C - 29°C (64°F - 84°F)
The driest, warmest months usually offer the most stable sea conditions and best underwater visibility, though this is also the busiest period for local operators.

Weather & Climate near Mar de las Calmas#

Climate

Mar de las Calmas's climate is classified as Hot Desert - Hot Desert climate with warm summers (peaking in August) and mild winters (coldest in January). Temperatures range from 15°C to 29°C. Very dry conditions with minimal rainfall with a pronounced dry season.

Air Quality: AQI 38 Good
Best Time to Visit
JulyAugustSeptember
Temperature & Rainfall
Temperature Range
28°
Warmest Month
16°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Excellent 15° - 22° 18° 40 mm some cloud 73% 5.0 m/s 0.8 moderate 10.5h
February Excellent 15° - 22° 18° 32 mm some cloud 75% 5.1 m/s 1.2 high 11.1h
March Ideal 15° - 23° 19° 23 mm some cloud 76% 5.4 m/s 1.6 very high 11.9h
April Ideal 15° - 23° 19° 12 mm some cloud 76% 5.6 m/s 2.1 extreme 12.7h
May Ideal 16° - 24° 20° 4 mm mostly sunny 76% 5.8 m/s 2.4 extreme 13.4h
June Ideal 18° - 26° 22° 0 mm mostly sunny 79% 6.3 m/s 2.5 extreme 13.7h
July Ideal 20° - 28° 24° 0 mm mostly sunny 82% 7.3 m/s 2.5 extreme 13.6h
August Ideal 20° - 29° 25° 1 mm mostly sunny 82% 6.9 m/s 2.3 extreme 13.0h
September Ideal 20° - 28° 24° 9 mm mostly sunny 79% 5.7 m/s 1.9 very high 12.2h
October Ideal 19° - 27° 23° 21 mm some cloud 76% 4.7 m/s 1.4 high 11.4h
November Excellent 18° - 25° 21° 34 mm partly cloudy 74% 4.3 m/s 0.9 moderate 10.7h
December Excellent 16° - 23° 19° 51 mm partly cloudy 74% 4.4 m/s 0.7 moderate 10.3h
Getting There & Around

How to Get to Mar de las Calmas#

The reserve lies at La Restinga on the southern tip of El Hierro; the island’s main town is Valverde. El Hierro Airport (Aeropuerto de El Hierro) is the island’s nearest airport with flights from other Canary Islands, and connections to the islands (and mainland Spain) are normally via Tenerife or Gran Canaria.

From Valverde or the airport the last stretch to La Restinga is a drive along winding island roads; use a taxi, rental car or local bus services where available, and on-island boat trips and operators in La Restinga handle access to specific sites in the reserve.

Tips for Visiting Mar de las Calmas#

  • This is a protected area - follow local rules, avoid touching marine life and ask operators about no-anchoring zones.
  • Bring reef-safe sunscreen and a light wetsuit if you plan to snorkel or dive, as water can be cooler below the surface.
  • Book diving or boat trips in advance during busy periods; equipment hire is available in La Restinga but choices are limited.
  • Sea conditions can change quickly; check weather and local sea forecasts before heading out.