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Hainan Island Climate, Average Sea Water Temperature of Sanya and Haikou Hainan Island, Hainan Island Climate: One Small Island, but two climates, Sub Tropical in the North (Haikou and its surounding areas), Tropical Climate in the South (Sanya-the beach destination for all visitors to Hainan Island)

Hainan Island enjoys a monsoon sub tropical AND tropical climate with annual average temperatures ranging between 18癈 (65癋) and 28癈 (82癋) and annual rainfall between 1,500 mm and 2,000 mm. An average of about 12 hours per day have daylight and more than 300 days of a year, on average, are sunny.

The average annual temperatures of Hainan Island hover at a beautiful 22-28 degrees Celsius. However April through June can be very hot and humid. Typhoons are a fact of Hainan Island Life with at least one hitting per year, typically between July and September. The powerful winds and rains can be devastation and shut down Hainan Island's transportation for one or two days.

But the interesting thing is the small island enjoys two nice climates, Haikou and its surrounding areas are in the sub tropical climate and Sanya Hainan Island is right in the tropical climate, which is the main reason why Sanya is the destination for all visitors and it is the highlight of Hainan Island holiday/visit.

Average Temperature of Haikou Hainan Island : Sub-tropical climate in the North

Average Temperature of Sanya Hainan Island: Tropical Climate in the South

Average Ocean/Sea Water Temperature of Sanya Hainan Island all year around