Coral Cove Beach sea temperature today: 30°C – beach water temperature, Coral Cove Beach, Thailand
Thailand · Koh Samui
Coral Cove Beach
Sea
29.5°C85.1°F
Air
UV
Bathtub
Above ⁦28°C⁩

Last updated ·

Today, September 13, the sea temperature at Coral Cove Beach is 29.5 °C (85 °F). That matches the usual average of 29.6 °C in September. Comfortable for swimming year-round.

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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 May (30.8°C). Coldest in January (27.9°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
January27.4°C27.9°C28.6°C26.5°C26.8°C27.0°C
February28.1°C28.5°C28.9°C26.7°C27.0°C27.2°C
March28.7°C29.2°C29.6°C27.4°C27.8°C28.1°C
April30.2°C30.4°C31.0°C28.1°C28.6°C28.9°C
May30.3°C30.8°C31.4°C28.3°C28.8°C29.1°C
June30.0°C30.2°C30.6°C28.0°C28.6°C29.0°C
July29.6°C29.8°C30.0°C27.7°C28.3°C28.8°C
August29.5°C29.8°C30.3°C27.4°C28.1°C28.6°C
September29.4°C29.6°C29.8°C27.3°C27.8°C28.1°C
October29.0°C29.5°C29.9°C26.8°C27.3°C27.7°C
November28.5°C28.9°C29.3°C26.6°C27.1°C27.2°C
December27.7°C28.0°C28.6°C26.6°C26.9°C27.1°C

About Coral Cove Beach

Coral Cove punctuates the southeast shore of Koh Samui, Thailand's second-largest island in the Gulf of Thailand, where a 150-metre crescent of fine sand sits crowded with rounded granite boulders – the same formation as the famous Hin Ta and Hin Yai rocks further south. Five kilometres north, Chaweng Beach runs six kilometres of resort strip and white sand, while Lamai Beach stretches mellower four kilometres south. The sea holds 28–29 °C82–84 °F from January through September, with Samui airport 25 minutes by Route 4169.

Frequently asked questions

Today, September 13, the sea at Coral Cove Beach is 29.5 °C (85 °F)85 °F (29.5 °C) – bathtub-warm. The usual September average is 29.6 °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 Coral Cove Beach is 29.5 °C85 °F.

Yes – the sea at Coral Cove Beach (Koh Samui, Thailand) stays swimmable all year. January is the coolest month, averaging 27.9 °C82 °F – ideal for swimming for most people; the warmest is May at 30.8 °C87 °F.

In May, at 30.8 °C87 °F on average. The coolest month is January at 27.9 °C82 °F – still above the 18 °C64 °F swimming line, so there is no off-season for swimming.