May sees increasing rains in much of West Africa, especially in coastal and forested areas, and road conditions can deteriorate in some regions. Tourist numbers decline and mosquito-borne disease risk increases with wetter conditions.
Average daily low and high (°C) and monthly rainfall, from each country's largest city. The badge shows how it feels, allowing for humidity.
Temperature map
-30°-20°-10°0°10°20°30°40°
Average temperature across West Africa in May.
Where to Go in West Africa in May
Senegal & The Gambia
Dakar, Saint‑Louis, Casamance & Banjul
The rains start in earnest in May across the southern coast and Casamance - Ziguinchor and nearby islands grow very green and slippery tracks become common. Northern Senegal (Saint‑Louis, Dakar) usually remains mostly dry early in the month, making it a good time for coastal touring. Expect fewer international tourists in Casamance as the wet season begins; bring good rain gear, waterproof bags and flexible schedules for ferry or dirt‑road travel.
Upper Guinea / Monsoon Coast
Guinea‑Bissau, Guinea, Sierra Leone & Liberia
May is the normal start of the big rains in this region - torrential, sustained downpours become common through June-September, especially around Freetown and Monrovia where some months are among West Africa’s wettest. Roads outside capital cities frequently deteriorate and short riverine crossings may be suspended. If you travel now, expect dramatic green landscapes but also flight delays, muddy tracks and increased risk of localized flooding.
Gulf of Guinea
Côte d’Ivoire, Ghana, Togo & Benin
May sees the rains strengthening across much of the Gulf coast, with consistent afternoon and evening downpours especially in the western half of the region. Accra often experiences the longer rainy season starting around this time, and Abidjan gets regular heavy storms. For travellers, urban traffic becomes trickier and beach resorts fill more on brief dry spells; waterproofs, good footwear and a patient itinerary help.
Nigeria
Coastal south, Lagos, Niger Delta & Jos Plateau
May is firmly into the rainy season across southern Nigeria - regular heavy downpours, strong winds and occasional urban flooding become common in Lagos and Port Harcourt. The Niger Delta’s waterways are lively but can interrupt small boat travel during storms. For travelers, flexible plans are essential and choose accommodations with good drainage and backup power.
May is the build‑up to the short rainy season: heat remains strong but the first thunderstorms and scattered showers start to appear in southern Sahel zones, making roads quickly turn tacky. Rivers and wadis are largely dry early in the month but rise later. For travelers, this month is risky for unpaved routes; arrange flexible plans and check local advisories for road conditions.
Events & Festivals in May
There are no major festivals or events in West Africa during May to be aware of.
Planning a trip to West Africa?
See how May compares with the rest of the year, then read the full guide.
