China · Hainan
Sanya Bay
Sea
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Air
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UV
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More like this
Climate · monthly averages
Sea temperature by month
30-year averages (1996–2025). Min/Max are typical daily lows and highs, not record extremes.
68°F
72°F
75°F
79°F
82°F
86°F
90°F
93°F
January
74.2°F(73°F–76°F)
February
73.8°F(72°F–76°F)
March
75.9°F(73°F–78°F)
April
79.8°F(78°F–81°F)
May
83.5°F(82°F–85°F)
June
85.0°F(84°F–86°F)
July
84.7°F(84°F–86°F)
August
84.5°F(83°F–86°F)
September
84.6°F(83°F–86°F)
October
82.5°F(81°F–84°F)
November
79.8°F(78°F–81°F)
December
76.7°F(75°F–78°F)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MinMin °F | 7372.7 | 7272.1 | 7373.3 | 7877.7 | 8282.3 | 8483.6 | 8483.6 | 8383.0 | 8383.0 | 8181.3 | 7878.5 | 7575.2 |
| AvgAvg °F | 7474.2 | 7473.8 | 7675.9 | 8079.8 | 8483.5 | 8585.0 | 8584.7 | 8584.5 | 8584.6 | 8382.5 | 8079.8 | 7776.7 |
| MaxMax °F | 7676.1 | 7675.9 | 7877.6 | 8181.4 | 8584.6 | 8686.2 | 8685.8 | 8686.1 | 8686.1 | 8483.6 | 8180.9 | 7878.3 |
Warmest in June (85.0°F). Coldest in February (73.8°F). Comfortable for swimming year-round.
About Sanya Bay
Sanya Bay traces 22 kilometres of palm-lined strand along the southern coast of Hainan Island, China's only tropical beach resort at 18° north, anchored by the artificial Phoenix Island archipelago rising from the water near the eastern end. East of the city, sheltered Dadonghai forms a compact family cove close to the old town, while Yalong Bay unfurls a 7-kilometre luxury-resort crescent considered the island's finest. Sea temperatures hold 27–29 °C from July through September; the local international airport is roughly 15 minutes by road.