Zhoushan weather by month & the best time to visit
China · coastal city break · humid subtropical climate
The best time to visit Zhoushan is October — its sunniest month (Sunshine Score 71/100), with July close behind. Zhoushan averages about 1,483 hours of sunshine a year. Daytime highs around 22°C / 72°F and roughly 90 mm of rain in October.
When is the best time to visit Zhoushan?
For sunshine, the best time to visit Zhoushan is October, then July. The dullest month is January (12/100, 82 mm of rain). The full month-by-month picture is in the table below.
How sunny is Zhoushan?
Zhoushan isn't a sunny place by world standards: about 1,483 hours of sunshine a year. 59 Sunshine Score points separate October (71) from January (12), so the month you pick matters. It ranks #173 of 254 destinations in China for annual sunshine, below the national median of 2,110 hours. The year's 1,524 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 12 | 10° / 50°F | 8° / 46°F | 82 mm | 2 | 10° / 50°F |
| February | 12 | 10° / 50°F | 8° / 46°F | 85 mm | 3 | 8° / 46°F |
| March | 21 | 12° / 54°F | 10° / 50°F | 123 mm | 4 | 10° / 50°F |
| April | 37 | 15° / 59°F | 13° / 55°F | 126 mm | 5 | 15° / 59°F |
| May | 60 | 20° / 68°F | 18° / 64°F | 157 mm | 6 | 19° / 66°F |
| June | 60 | 24° / 75°F | 22° / 72°F | 255 mm | 6 | 24° / 75°F |
| July | 62 | 27° / 81°F | 26° / 79°F | 135 mm | 9 | 27° / 81°F |
| August | 60 | 28° / 82°F | 27° / 81°F | 145 mm | 9 | 30° / 86°F |
| September | 60 | 26° / 79°F | 25° / 77°F | 149 mm | 7 | 29° / 84°F |
| October | 71 | 22° / 72°F | 21° / 70°F | 90 mm | 5 | 24° / 75°F |
| November | 58 | 18° / 64°F | 16° / 61°F | 92 mm | 3 | 20° / 68°F |
| December | 30 | 13° / 55°F | 11° / 52°F | 85 mm | 2 | 13° / 55°F |
Sea temperature in Zhoushan by month
The sea off Zhoushan is warmest in August at around 30°C / 86°F, and coolest in February at 8°C / 46°F. The water sits at a comfortable 21°C or warmer roughly 5 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Head-to-head
How Zhoushan compares month by month: Zhoushan vs Shanghai (Pudong) · Zhoushan vs Ningbo · Zhoushan vs Taizhou (Luqiao) · all comparisons
Zhoushan: questions and answers
What kind of destination is Zhoushan?
Zhoushan is a coastal city break in China with a humid subtropical climate — the sea reaches 30°C at its warmest and is swimmable (21°C+) about 5 months a year.
How many hours of sunshine does Zhoushan get a year?
Zhoushan gets about 1,483 hours of sunshine a year, at its best around October.
When is the best time to visit Zhoushan?
The sunniest time to visit Zhoushan is October, when the Sunshine Score peaks at 71/100 (with July close behind). Expect daytime highs around 22°C / 72°F.
What is the least sunny month in Zhoushan?
January is the least sunny month in Zhoushan, scoring 12/100 with about 82 mm of rain.
What is the sea temperature in Zhoushan?
The sea in Zhoushan ranges from about 8°C (February) to 30°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Zhoushan?
The typical midday UV index in Zhoushan peaks around 9 (very high) in July, easing to about 2 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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