Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 30.3 °C | 27.9 °C | 22 days | Unfavourable season |
| February | 30.8 °C | 28.2 °C | 20 days | Unfavourable season |
| March | 31.1 °C | 28.6 °C | 20 days | Unfavourable season |
| April | 30.9 °C | 28.2 °C | 21 days | Unfavourable season |
| May | 30.6 °C | 26.7 °C | 12 days | Ideal — one of the best times of year |
| June | 29.1 °C | 24.5 °C | 2 days | Ideal — one of the best times of year |
| July | 28.4 °C | 22.9 °C | 1 day | Ideal — one of the best times of year |
| August | 28.4 °C | 22.6 °C | 2 days | Ideal — one of the best times of year |
| September | 29.4 °C | 24.6 °C | 5 days | Ideal — one of the best times of year |
| October | 31 °C | 26.3 °C | 17 days | Possible, with trade-offs |
| November | 30.6 °C | 27.3 °C | 25 days | Unfavourable season |
| December | 30.1 °C | 27.1 °C | 26 days | Unfavourable season |
Nearby in September
Before you go
Three things to check once you have picked your dates.
Entry
Visa required before departure. Passport valid for at least 6 months. Apply at the DRC Embassy and allow 2 to 3 weeks; yellow fever certificate required; departure tax of 55 US dollars on international flights.
For a British passport, per the UK Foreign Office on 26 August 2026. Rules change: check before booking.
Safety
Outside the areas advised against
Parts of the country are advised against (the east (Ituri, Haut-Uélé, North Kivu, South Kivu, Maniema, Tanganyika, Haut-Lomami), Kwamouth territory (Bandundu), the Central African border, the N'djili and Kimbanseke districts of Kinshasa, Kisangani airport); Boma is not one of them.
Official advice updated 26 August 2026
Health
CDC level 4 notice: Ebola Bundibugyo Virus Disease
CDC level 3 notice: Ebola Bundibugyo Virus Disease
CDC level 2 notice: Ebola Bundibugyo Virus Disease
CDC level 2 notice: Meningococcal Disease
CDC level 2 notice: Polio (global)
Vaccines · typhoid recommended for most travellers; hepatitis A and hepatitis B if you are not already vaccinated; rabies, cholera, polio and meningococcal disease depending on activities and areas visited. Routine vaccines up to date (measles in particular).
Yellow fever · Vaccine recommended for the whole country. Vaccination certificate required on entry for all travellers.
Malaria · Present. Areas: All. Preventive medication recommended: Atovaquone-proguanil, doxycycline, mefloquine, tafenoquine — prescribed before departure.
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 Boma in September?
The sea averages 24.6°C in September — yes, pleasant swimming.
How hot is Boma in September?
Expect 29.4°C in the afternoon and 21.9°C at night, averaged over the last 10 years.
Does it rain a lot in Boma in September?
Around 5 days with rain (≥ 1 mm) in the month — 18% of days.