Ocean Flower Island sea temperature today: 27°C – beach water temperature, Ocean Flower Island, China
China · Hainan
Ocean Flower Island
Sea
27.3°C81.1°F
Air
UV
Beach day
⁦23–28°C⁩

Last updated ·

Today, September 13, the sea temperature at Ocean Flower Island is 27.3 °C (81 °F). That is 2.4 °C cooler than the usual 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 July (30.7°C). Coldest in January (20.4°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
January19.2°C20.4°C22.3°C17.4°C18.9°C20.5°C
February19.7°C20.6°C21.9°C18.7°C20.2°C21.9°C
March22.1°C22.9°C23.8°C21.6°C23.3°C24.8°C
April24.4°C26.0°C27.6°C24.7°C26.6°C28.0°C
May28.3°C29.0°C30.0°C26.6°C28.4°C29.6°C
June29.8°C30.2°C30.5°C28.2°C29.8°C31.0°C
July30.2°C30.7°C31.3°C28.0°C29.6°C30.6°C
August30.2°C30.6°C30.8°C27.8°C29.3°C30.4°C
September29.1°C29.7°C30.1°C26.7°C28.1°C29.2°C
October27.6°C27.9°C28.1°C24.8°C26.0°C27.0°C
November24.9°C25.5°C26.1°C22.4°C23.8°C24.9°C
December22.3°C22.7°C23.4°C18.9°C20.1°C21.5°C

About Ocean Flower Island

Off Hainan's northern coast, Ocean Flower Island is a 381-hectare artificial archipelago of three petal-shaped islets, conceived by Evergrande as a $24-billion resort city before the developer's 2021 collapse left much of it half-built. Imported white sand rings each petal, linked to the mainland near Danzhou by a five-kilometre causeway; a handful of hotels and a theme park now operate among the unfinished towers. The South China Sea sits between 27 and 29 °C81 and 84 °F from July through September; Haikou Meilan International is about 75 minutes by the G15 expressway.

Frequently asked questions

Today, September 13, the sea at Ocean Flower Island is 27.3 °C (81 °F)81 °F (27.3 °C) – ideal for swimming for most people. 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 Ocean Flower Island is 27.3 °C81 °F.

Yes – the sea at Ocean Flower Island (Hainan, China) stays swimmable all year. January is the coolest month, averaging 20.5 °C69 °F – refreshing, good for a short swim; the warmest is July at 30.7 °C87 °F.

In July, at 30.7 °C87 °F on average. The coolest month is January at 20.5 °C69 °F – still above the 18 °C64 °F swimming line, so there is no off-season for swimming.