Hainan Sea Temperature

This page provides detailed information about the water temperature in Hainan, China. All countries, cities and resorts on the coast. The range of sea temperatures for today. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Current Sea Temperature

18.5°C

minimal

20.3°C

average

21.9°C

maximum

Graph of Sea Temperature Changes in Hainan Over the Last 60 Days

Water temperature in the Hainan by month

Month	Minimum	Maximum
January	18°C	26°C
February	17°C	25°C
March	17°C	27°C
April	19°C	29°C
May	23°C	31°C
June	26°C	32°C
July	27°C	33°C
August	27°C	32°C
September	25°C	32°C
October	25°C	31°C
November	22°C	29°C
December	18°C	29°C

The Warmest Places on the Seaside in Hainan Today

22°C

Yinggehai

22°C

Tianya

22°C

Sanya

21°C

Dadunhai

21°C

Yalong Bay

21°C

Lian

List of All Coastal Cities in Hainan

Seas and Oceans that Border Hainan

South China Sea

China: List of Regions

Water Temperature in Hainan: General Trends and Swimming Opportunities

Original name of the region: 海南

Hainan, China’s southernmost province, is a tropical island renowned for its warm and crystal-clear coastal waters. The sea temperatures around Hainan remain high throughout the year, thanks to its proximity to the equator and the influence of the South China Sea. During the summer months, from May to October, water temperatures typically range from 28°C to 31°C, creating an ideal environment for swimming, snorkeling, and diving. This consistent warmth, combined with Hainan’s pristine beaches, makes it a popular destination for tourists seeking tropical escapes.

In the cooler months, from November to April, the sea temperatures drop slightly but remain inviting, averaging between 23°C and 26°C. These mild winter temperatures ensure that water activities can be enjoyed year-round, making Hainan a favored retreat even during China’s colder seasons. The island’s stable and warm sea temperatures, coupled with its lush landscapes and vibrant marine life, establish Hainan as one of Asia’s premier destinations for seaside relaxation and adventure.

Geographical Location of Hainan

Frequently Asked Questions About Hainan and its Water Temperatures

What is the current sea temperature on the coast of Hainan in China?

The sea temperature today on the coast of Hainan ranges from 65°F (18.5°C) in Xiuying to 71°F (21.9°C) in Yinggehai.

When does the sea in Hainan in China reach a comfortable swimming temperature?

In Hainan (China) the sea temperature is comfortable throughout the year. It should be noted that the mentioned values apply to the warmest point of the region. In other areas of Hainan, the values may vary.

What are the most popular seaside resorts in Hainan?

The most popular places on the coast of Hainan (China), based on our visitors' interest in the water temperature, are cities Sanya, Dadunhai, Yalong Bay, Guangcun, and Lian.

Which seas and oceans does the Hainan have access to?

Hainan (China) has access only to the South China Sea.