Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 27 °C | 27.2 °C | 13 days | Ideal — one of the best times of year |
| February | 26.9 °C | 26.8 °C | 12 days | Ideal — one of the best times of year |
| March | 27.2 °C | 26.7 °C | 13 days | Ideal — one of the best times of year |
| April | 28.1 °C | 27.2 °C | 15 days | Possible, with trade-offs |
| May | 29.2 °C | 28.1 °C | 18 days | Possible, with trade-offs |
| June | 30.2 °C | 28.8 °C | 14 days | Possible, with trade-offs |
| July | 30.1 °C | 28.9 °C | 12 days | Ideal — one of the best times of year |
| August | 30.3 °C | 29.1 °C | 16 days | Possible, with trade-offs |
| September | 30.4 °C | 29.7 °C | 22 days | Unfavourable season |
| October | 29.9 °C | 29.6 °C | 22 days | Unfavourable season |
| November | 28.5 °C | 29 °C | 21 days | Unfavourable season |
| December | 27.6 °C | 28 °C | 15 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
Travel advised against
Authorities advise against travelling there.
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 Cap-Haïtien in September?
The sea averages 29.7°C in September — yes, pleasant swimming.
How hot is Cap-Haïtien in September?
Expect 30.4°C in the afternoon and 25.5°C at night, averaged over the last 10 years.
Does it rain a lot in Cap-Haïtien in September?
Around 22 days with rain (≥ 1 mm) in the month — 72% of days.