Monthly Climate
Menu

Best time to visit Sasebo

October is the best time to visit Sasebo 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 November.

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 92/100
A beach holiday September sea 26 °C
The least cloud October 48 % average cloud cover
The least rain January 63 mm
Warmth August 30 °C
Cooler weather January 9.2 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 October 92 22 °C 7 78
2 May 87 22 °C 10 55
3 November 83 17 °C 7 51
4 April 81 18 °C 10 32
5 June 71 25 °C 16 65
6 September 69 27 °C 13 80
7 March 62 14 °C 11 13
8 December 61 11 °C 7 31
9 July 54 29 °C 16 74
10 February 54 10 °C 8 16
11 August 52 30 °C 15 71
12 January 50 9.2 °C 8 22

For a beach holiday

September scores highest, with a sea temperature of 26 °C and air temperatures around 27 °C. The sea is above 20 °C from June to November.

Month Sea Air Sunshine Beach score
January 16 °C 9.2 °C 69 % 22
February 15 °C 10 °C 65 % 16
March 15 °C 14 °C 63 % 13
April 16 °C 18 °C 62 % 32
May 19 °C 22 °C 66 % 55
June 21 °C 25 °C 79 % 65
July 25 °C 29 °C 71 % 74
August 27 °C 30 °C 61 % 71
September 26 °C 27 °C 57 % 80
October 24 °C 22 °C 48 % 78
November 21 °C 17 °C 53 % 51
December 18 °C 11 °C 61 % 31

When to think twice

January scores lowest with about 8 wet days and highs near 9.2 °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 9.2 °C 63 mm 69 %
February 10.3 °C 77 mm 65 %
March 13.6 °C 120 mm 63 %
April 18.2 °C 143 mm 62 %
May 22.4 °C 149 mm 66 %
June 25.3 °C 319 mm 79 %
July 28.6 °C 290 mm 71 %
August 30.1 °C 185 mm 61 %
September 27.0 °C 201 mm 57 %
October 22.3 °C 103 mm 48 %
November 16.9 °C 91 mm 53 %
December 11.5 °C 69 mm 61 %

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.