El Hierro sea temperature

The sea around El Hierro is currently about 25.5°C. It is warmest in September (around 24.1°C) and coolest in March (around 19.6°C).

25.5°C Average sea temperature off El Hierro right now

That's about 1.4°C warmer than usual for this time of year.

Warm enough to swim comfortably without a wetsuit.

Measured sea temperature around El Hierro — last 30 days

Over the last 14 days, the sea around El Hierro averaged 25.2°C, with measured readings between 25.0°C and 25.5°C.

Sea

Show the daily measurements

Day	Sea
10 Sep	25.5°C
9 Sep	25.5°C
8 Sep	25.0°C
7 Sep	25.0°C
6 Sep	25.5°C
5 Sep	25.5°C
4 Sep	25.5°C
3 Sep	25.0°C
2 Sep	25.0°C
1 Sep	25.0°C
31 Aug	25.5°C
30 Aug	25.0°C
29 Aug	25.0°C
28 Aug	25.5°C
27 Aug	25.5°C
26 Aug	25.0°C
25 Aug	25.5°C
24 Aug	25.5°C
23 Aug	25.0°C
22 Aug	25.5°C
21 Aug	25.5°C
20 Aug	25.5°C
19 Aug	25.5°C
18 Aug	25.0°C
17 Aug	25.0°C
16 Aug	24.5°C
15 Aug	24.5°C
14 Aug	24.5°C
13 Aug	24.5°C
12 Aug	24.5°C

El Hierro sea temperature month by month

Multi-year monthly sea-surface averages for El Hierro. “Now” is the live average across the island's monitored beaches.
Month	Sea temperature	Swimming
January	20.5°	Pleasant
February	19.8°	Cool
March	19.6°	Cool
April	20.1°	Pleasant
May	20.9°	Pleasant
June	21.9°	Pleasant
July	22.6°	Warm
August	23.4°	Warm
September	24.1°	Warm
October	24.0°	Warm
November	22.9°	Warm
December	21.6°	Pleasant

Frequently asked questions

Can you swim in the sea in El Hierro in winter?

Yes. Even in the coolest month (March) the sea around El Hierro averages about 19.6°C — swimmable for many, especially with a short wetsuit. In summer it reaches around 24.1°C.

Which month has the warmest sea in El Hierro?

September, when the sea around El Hierro averages about 24.1°C.

Is the sea cold in El Hierro?

Not very. The sea around El Hierro stays mild all year, from about 19.6°C in March to 24.1°C in September.

How warm has the sea around El Hierro been recently?

Over the last 14 days, the sea around El Hierro averaged 25.2°C, with measured readings between 25.0°C and 25.5°C.

All beaches on El Hierro · Best Canary Island for Swimming

Data source: AEMET © Agencia Estatal de Meteorología · Climate averages from AEMET normals (1981–2010 / 1991–2020). Last reviewed 2026-06-12.