Monthly Climate
Menu

Best time to visit Zhoushan

October is the best time to visit Zhoushan for general sightseeing, with average highs of 22 °C and about 7 wet days. The comfortable season runs roughly October to November. The sea stays above 20 °C from June to October.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking October comfort 88/100
A beach holiday July sea 25 °C
The least cloud October 53 % average cloud cover
The least rain December 67 mm
Warmth August 29 °C
Cooler weather January 8.8 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 October 88 22 °C 7 76
2 November 80 17 °C 9 46
3 May 79 21 °C 12 46
4 September 68 26 °C 11 83
5 April 68 16 °C 12 13
6 June 67 24 °C 15 66
7 December 60 12 °C 8 21
8 July 59 28 °C 9 88
9 August 53 29 °C 12 80
10 March 51 12 °C 13 4
11 February 45 9.2 °C 10 11
12 January 44 8.8 °C 10 11

For a beach holiday

July scores highest, with a sea temperature of 25 °C and air temperatures around 28 °C. The sea is above 20 °C from June to October.

Month Sea Air Sunshine Beach score
January 12 °C 8.8 °C 64 % 11
February 10 °C 9.2 °C 63 % 11
March 11 °C 12 °C 67 % 4
April 14 °C 16 °C 68 % 13
May 18 °C 21 °C 70 % 46
June 22 °C 24 °C 82 % 66
July 25 °C 28 °C 66 % 88
August 27 °C 29 °C 58 % 80
September 26 °C 26 °C 58 % 83
October 23 °C 22 °C 53 % 76
November 20 °C 17 °C 58 % 46
December 16 °C 12 °C 56 % 21

When to think twice

January scores lowest with about 10 wet days and highs near 8.8 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 8.8 °C 72 mm 64 %
February 9.2 °C 72 mm 63 %
March 11.8 °C 117 mm 67 %
April 16.0 °C 116 mm 68 %
May 20.8 °C 137 mm 70 %
June 24.5 °C 258 mm 82 %
July 28.2 °C 104 mm 66 %
August 28.9 °C 119 mm 58 %
September 26.3 °C 133 mm 58 %
October 22.1 °C 75 mm 53 %
November 17.5 °C 71 mm 58 %
December 11.8 °C 67 mm 56 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.