Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 21.4 °C | 20.1 °C | 11 days | Pleasant — a good time to go |
| February | 23.1 °C | 19.4 °C | 9 days | Pleasant — a good time to go |
| March | 27.2 °C | 20.8 °C | 10 days | Ideal — one of the best times of year |
| April | 30 °C | 23.5 °C | 14 days | Possible, with trade-offs |
| May | 31.8 °C | 26.7 °C | 19 days | Unfavourable season |
| June | 32.8 °C | 28.5 °C | 20 days | Unfavourable season |
| July | 32.3 °C | 29.3 °C | 20 days | Unfavourable season |
| August | 31.5 °C | 29.1 °C | 23 days | Unfavourable season |
| September | 30.3 °C | 28.9 °C | 21 days | Unfavourable season |
| October | 27.8 °C | 27.7 °C | 19 days | Unfavourable season |
| November | 25.8 °C | 25.6 °C | 12 days | Ideal — one of the best times of year |
| December | 21.8 °C | 22.5 °C | 8 days | Pleasant — a good time to go |
Nearby in March
Before you go
Three things to check once you have picked your dates.
Entry
No visa needed for stays of up to 30 days. Passport valid for at least 6 months. Visa-free until 31 December 2026 for standard ‘British citizen’ passports; register with the local Public Security Bureau within 24 hours (hotels do this).
For a British passport, per the UK Foreign Office on 27 August 2026. Rules change: check before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 27 August 2026
Health
Vaccines · hepatitis A and hepatitis B if you are not already vaccinated; rabies, Japanese encephalitis and tick-borne encephalitis depending on activities and areas visited. Routine vaccines up to date (measles in particular).
Yellow fever · No yellow fever locally, vaccine not recommended. Certificate required only if you arrive from a country with yellow fever risk.
Malaria · None.
Mosquitoes · dengue reported: protect yourself from bites.
Per the CDC (page reviewed 25 August 2026); see a travel clinic a few weeks before departure.
Beau Fixe is not a safety or health authority. These notes summarise dated public texts and link to their source: France Diplomatie (Licence Ouverte 2.0), Foreign, Commonwealth & Development Office (gov.uk, Open Government Licence v3.0), Centers for Disease Control and Prevention (Source: CDC). Only the competent authorities are authoritative.
FAQ
Can you swim in Haikou in March?
The sea averages 20.8°C in March — swimming is possible but brisk.
How hot is Haikou in March?
Expect 27.2°C in the afternoon and 20.6°C at night, averaged over the last 10 years.
Does it rain a lot in Haikou in March?
Around 10 days with rain (≥ 1 mm) in the month — 33% of days.