Maho Beach sea temperature today: 30°C – beach water temperature, Maho Beach, Sint Maarten
Sint Maarten · Caribbean
Maho Beach
Sea
29.7°C85.5°F
Air
UV
Bathtub
Above ⁦28°C⁩

Last updated ·

Today, September 13, the sea temperature at Maho Beach is 29.7 °C (85 °F). That matches the usual average of 29.7 °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 September (29.7°C). Coldest in February (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
January26.5°C26.9°C27.4°C25.1°C25.4°C25.5°C
February26.0°C26.4°C26.9°C24.7°C25.1°C25.2°C
March26.1°C26.5°C27.1°C24.8°C25.2°C25.4°C
April26.4°C26.9°C27.6°C25.1°C25.5°C25.7°C
May27.2°C27.8°C28.6°C26.3°C26.6°C26.9°C
June27.8°C28.4°C29.3°C26.9°C27.3°C27.5°C
July28.1°C28.7°C29.3°C27.1°C27.6°C27.8°C
August28.6°C29.1°C29.6°C27.5°C27.9°C28.1°C
September29.2°C29.7°C30.1°C27.7°C28.0°C28.2°C
October28.9°C29.5°C30.2°C27.5°C27.8°C28.0°C
November28.2°C28.7°C29.2°C26.7°C27.0°C27.0°C
December27.3°C27.7°C28.3°C25.8°C26.1°C26.2°C

About Maho Beach

On the Dutch side of Saint Martin, Maho Beach sits directly beneath the approach to Princess Juliana International Airport, where wide-body jets clear the chain-link fence by twenty metres before touching down on the runway. The 250-metre strand is the plane-spotting anchor of the Caribbean; west around the headland, Mullet Bay curves into a calmer golden crescent, and Simpson Bay stretches south past the marina. Sea temperatures hold between 27 and 29 °C81 and 84 °F year-round, with the calmest swimming from March through June.

Frequently asked questions

Today, September 13, the sea at Maho Beach is 29.7 °C (85 °F)85 °F (29.7 °C) – bathtub-warm. The usual September average is 29.7 °C85 °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 Maho Beach is 29.7 °C85 °F.

Yes – the sea at Maho Beach (Sint Maarten) stays swimmable all year. February is the coolest month, averaging 26.4 °C80 °F – ideal for swimming for most people; the warmest is September at 29.7 °C85 °F.

In September, at 29.7 °C85 °F on average. The coolest month is February at 26.4 °C80 °F – still above the 18 °C64 °F swimming line, so there is no off-season for swimming.