Reynisfjara (Iceland) sea temperature today: 10°C – beach water temperature, Reynisfjara (Iceland), Iceland
Iceland · Atlantic Europe
Reynisfjara
Sea
10.4°C50.7°F
Air
UV
Polar bears
Under ⁦13°C⁩

Last updated ·

Today, September 13, the sea temperature at Reynisfjara is 10.4 °C (51 °F). That matches the usual average of 10.8 °C in September. Rarely comfortable for swimming.

Climate · monthly averages

Sea temperature by month

5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.

Warmest in August (11.7°C). Coldest in March (7.3°C). Rarely comfortable for swimming.

5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.
MonthSea · MinSea · AvgSea · MaxAir · MinAir · AvgAir · Max
January7.2°C7.5°C7.8°C-0.3°C-0.1°C-0.1°C
February7.1°C7.4°C7.6°C0.7°C0.8°C1.0°C
March7.2°C7.3°C7.6°C0.1°C0.5°C1.1°C
April7.3°C7.7°C7.9°C1.9°C2.4°C3.0°C
May7.8°C8.5°C9.1°C4.2°C4.5°C4.9°C
June9.0°C9.5°C10.1°C5.9°C6.3°C6.8°C
July10.7°C11.2°C11.8°C7.9°C8.3°C8.7°C
August11.2°C11.7°C12.2°C7.8°C8.3°C8.9°C
September10.1°C10.8°C11.3°C5.9°C6.4°C7.0°C
October8.7°C9.1°C9.7°C3.4°C3.8°C4.3°C
November8.0°C8.4°C8.8°C2.3°C2.3°C2.4°C
December7.6°C8.0°C8.5°C0.3°C0.3°C0.4°C

About Reynisfjara

Reynisfjara stretches along Iceland's south coast just west of Vík í Mýrdal, where the ink-black sand of pulverised basalt meets the open North Atlantic with no land between it and Antarctica. The cliff at its eastern end shelters the hexagonal Gardar basalt columns and a small set of sea caves, while the Reynisdrangar stacks rise as jagged silhouettes a few hundred metres offshore, drawing visitors for the sneaker waves and raw coastal geometry. Sea temperatures stay between 6 and 10 °C43 and 50 °F year-round.

Frequently asked questions

Today, September 13, the sea at Reynisfjara is 10.4 °C (51 °F)51 °F (10.4 °C) – cold-water swimmers only. The usual September average is 10.8 °C51 °F.

No single number works for everyone, so the scale on this page is only a guide to how the water feels: below 13 °C55 °F icy, 13–18 °C55–64 °F cold, 18–23 °C64–73 °F refreshing, 23–28 °C73–82 °F pleasantly warm and above 28 °C82 °F like a bath. Right now the sea at Reynisfjara is 10.4 °C51 °F.

In May the sea at Reynisfjara (Iceland) averages 8.5 °C47 °F – cold-water swimmers only. It keeps warming until August, when it peaks at 11.7 °C53 °F.

In October the sea at Reynisfjara (Iceland) still averages 9.1 °C48 °F – cold-water swimmers only. It peaks in August at 11.7 °C53 °F and cools slowly from there.