Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 27.2 °C | 27.3 °C | 18 days | Possible, with trade-offs |
| February | 27.5 °C | 27.1 °C | 14 days | Possible, with trade-offs |
| March | 27.9 °C | 27.1 °C | 16 days | Possible, with trade-offs |
| April | 28.8 °C | 27.5 °C | 14 days | Possible, with trade-offs |
| May | 29.4 °C | 27.9 °C | 15 days | Possible, with trade-offs |
| June | 29.3 °C | 28.2 °C | 21 days | Unfavourable season |
| July | 29 °C | 28.5 °C | 25 days | Unfavourable season |
| August | 29.5 °C | 29 °C | 23 days | Unfavourable season |
| September | 30.2 °C | 29.6 °C | 20 days | Unfavourable season |
| October | 29.5 °C | 29.3 °C | 21 days | Unfavourable season |
| November | 28.6 °C | 28.8 °C | 20 days | Unfavourable season |
| December | 27.9 °C | 28 °C | 18 days | Possible, with trade-offs |
Before you go
Three things to check once you have picked your dates.
Entry
Entry rules depend on your nationality and change often. Check them before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 10 December 2025
Health
Recommended vaccinations, water quality, mosquitoes: advice depends on the country and the season. Some vaccines need time before departure.
Beau Fixe is not a safety or health authority. These notes summarise public advisories and link to their source; only the competent authorities are authoritative. Alert levels: Foreign, Commonwealth & Development Office (gov.uk), Open Government Licence v3.0.
FAQ
Can you swim in Castries in January?
The sea averages 27.3°C in January — yes, pleasant swimming.
How hot is Castries in January?
Expect 27.2°C in the afternoon and 23.8°C at night, averaged over the last 10 years.
Does it rain a lot in Castries in January?
Around 18 days with rain (≥ 1 mm) in the month — 59% of days.