Monthly Climate
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Best time to visit Yeosu

October is the best time to visit Yeosu for general sightseeing, with average highs of 20 °C and about 5 wet days. The sea stays above 20 °C from July 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 93/100
A beach holiday September sea 24 °C
The least cloud December 43 % average cloud cover
The least rain December 30 mm
Warmth August 28 °C
Cooler weather January 5.7 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 October 93 20 °C 5 67
2 May 87 20 °C 8 42
3 June 82 23 °C 10 62
4 September 82 25 °C 9 82
5 April 73 16 °C 8 20
6 November 71 14 °C 5 33
7 July 63 26 °C 15 71
8 August 59 28 °C 14 77
9 March 56 11 °C 7 17
10 December 46 7.8 °C 4 25
11 February 44 7.6 °C 5 21
12 January 37 5.7 °C 4 23

For a beach holiday

September scores highest, with a sea temperature of 24 °C and air temperatures around 25 °C. The sea is above 20 °C from July to October.

Month Sea Air Sunshine Beach score
January 13 °C 5.7 °C 50 % 23
February 12 °C 7.6 °C 52 % 21
March 12 °C 11 °C 54 % 17
April 13 °C 16 °C 56 % 20
May 16 °C 20 °C 60 % 42
June 20 °C 23 °C 71 % 62
July 23 °C 26 °C 72 % 71
August 26 °C 28 °C 62 % 77
September 24 °C 25 °C 58 % 82
October 21 °C 20 °C 43 % 67
November 17 °C 14 °C 43 % 33
December 14 °C 7.8 °C 43 % 25

When to think twice

January scores lowest with about 4 wet days and highs near 5.7 °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 5.7 °C 33 mm 50 %
February 7.6 °C 45 mm 52 %
March 11.3 °C 82 mm 54 %
April 15.8 °C 121 mm 56 %
May 20.0 °C 136 mm 60 %
June 23.0 °C 198 mm 71 %
July 26.2 °C 267 mm 72 %
August 27.7 °C 230 mm 62 %
September 24.6 °C 153 mm 58 %
October 19.9 °C 64 mm 43 %
November 13.8 °C 47 mm 43 %
December 7.8 °C 30 mm 43 %

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.