Nosy Iranja sea temperature today: 27°C – beach water temperature, Nosy Iranja, Madagascar
Madagascar · Indian Ocean
Nosy Iranja
Sea
26.9°C80.4°F
Air
UV
Beach day
⁦23–28°C⁩

Last updated ·

Today, September 13, the sea temperature at Nosy Iranja is 26.9 °C (80 °F). That matches the usual average of 26.7 °C in September. Comfortable for swimming year-round.

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 April (30.1°C). Coldest in August (26.4°C). Comfortable for swimming year-round.

5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.
MonthSea · MinSea · AvgSea · MaxAir · MinAir · AvgAir · Max
January29.2°C29.6°C29.8°C25.3°C26.8°C28.2°C
February29.2°C29.5°C29.9°C25.5°C27.0°C28.5°C
March29.4°C29.8°C30.4°C25.6°C27.1°C28.6°C
April29.8°C30.1°C30.5°C25.8°C27.5°C29.1°C
May28.9°C29.4°C29.9°C24.8°C26.6°C28.3°C
June27.5°C28.0°C28.4°C23.4°C25.4°C27.5°C
July26.2°C26.7°C27.2°C22.6°C24.8°C26.9°C
August26.0°C26.4°C27.0°C22.6°C24.7°C26.8°C
September26.1°C26.7°C27.2°C23.4°C25.3°C27.1°C
October26.6°C27.5°C28.1°C24.3°C26.1°C28.0°C
November27.9°C28.6°C29.4°C25.1°C26.8°C28.4°C
December28.9°C29.4°C29.9°C25.5°C27.1°C28.6°C

About Nosy Iranja

Off northwest Madagascar in the Mozambique Channel, Nosy Iranja is a pair of small islands linked by a 1.5-kilometre sandbar that surfaces at low tide and submerges at high, joining Nosy Iranja Be to the smaller Nosy Iranja Kely. The larger island fringes white sand under coconut palms, while the islet shelters a Malagasy fishing village and a colonial-era lighthouse above beaches where hawksbill turtles come ashore to nest. Indian Ocean waters hold 27–29 °C81–84 °F from December through February, easing only to 24–25 °C75–77 °F in July and August.

Frequently asked questions

Today, September 13, the sea at Nosy Iranja is 26.9 °C (80 °F)80 °F (26.9 °C) – ideal for swimming for most people. The usual September average is 26.7 °C80 °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 Nosy Iranja is 26.9 °C80 °F.

Yes – the sea at Nosy Iranja (Indian Ocean, Madagascar) stays swimmable all year. August is the coolest month, averaging 26.4 °C80 °F – ideal for swimming for most people; the warmest is April at 30.1 °C86 °F.

In April, at 30.1 °C86 °F on average. The coolest month is August at 26.4 °C80 °F – still above the 18 °C64 °F swimming line, so there is no off-season for swimming.