Monthly Climate
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Best time to visit Castries

February is the best time to visit Castries for general sightseeing, with average highs of 27 °C and about 9 wet days. The comfortable season runs roughly December to April.

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 February comfort 68/100
A beach holiday February sea 27 °C
The least cloud January 37 % average cloud cover
The least rain February 25 mm
Warmth September 29 °C
Cooler weather January 27 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 February 68 27 °C 9 87
2 March 66 28 °C 10 85
3 January 65 27 °C 12 81
4 April 62 29 °C 11 81
5 December 61 27 °C 13 77
6 May 57 29 °C 12 78
7 June 51 29 °C 16 72
8 November 51 28 °C 19 71
9 October 48 29 °C 20 69
10 September 48 29 °C 19 68
11 August 46 29 °C 20 70
12 July 46 29 °C 20 71

For a beach holiday

February scores highest, with a sea temperature of 27 °C and air temperatures around 27 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 27 °C 27 °C 37 % 81
February 27 °C 27 °C 38 % 87
March 27 °C 28 °C 44 % 85
April 27 °C 29 °C 53 % 81
May 28 °C 29 °C 59 % 78
June 28 °C 29 °C 63 % 72
July 28 °C 29 °C 54 % 71
August 29 °C 29 °C 55 % 70
September 29 °C 29 °C 62 % 68
October 29 °C 29 °C 61 % 69
November 29 °C 28 °C 53 % 71
December 28 °C 27 °C 42 % 77

When to think twice

July scores lowest with about 20 wet days and highs near 29 °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 27.0 °C 36 mm 37 %
February 27.4 °C 25 mm 38 %
March 27.9 °C 30 mm 44 %
April 28.5 °C 39 mm 53 %
May 29.1 °C 51 mm 59 %
June 29.0 °C 68 mm 63 %
July 28.8 °C 89 mm 54 %
August 29.0 °C 101 mm 55 %
September 29.2 °C 105 mm 62 %
October 28.7 °C 119 mm 61 %
November 28.0 °C 103 mm 53 %
December 27.5 °C 46 mm 42 %

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.