Guinea-Bissau in March: Weather, Crowds & What to Expect

Bissau & Coastal Lowlands

A dry, dusty clarity often appears through March, with daytime temperatures commonly touching 30-32°C and nights noticeably cooler than in the wet season. The harmattan wanes late in the month, and humidity starts to rebuild, especially near the mangrove channels; Bissau’s streets can be dusty until the first rains. Travelers will find fewer insects than later on and easier road travel inland, so it’s a good month for planning short excursions around Cacheu.

Bijagós (Bissagos) Archipelago

March can feel noticeably warmer and humid as the harmattan fades; sea breezes provide relief but the sun is stronger on exposed sandbanks. Boat operators begin regular runs before the rainy season resumes and wildlife visibility is excellent as coastal waters are clearer. Travelers should pack reef shoes for walks across tidal flats and book transport ahead of time - small local schedules fill quickly in the dry season.

Southern Mangroves & Rainforest (Tombali, Cacine)

March sees humidity rise and the landscape start to green as early storms build; afternoon showers become more likely late in the month. Temperatures climb into the low 30s, making midday activities less appealing but mornings excellent for canoe trips through mangrove channels. Travelers should be ready for sudden rain and slick trails; lightweight waterproofs and good insect repellent are sensible additions to any pack.

Eastern Interior Savanna & Highlands (Gabú, Bafatá)

March feels hotter as humidity rebounds and daytime temperatures often reach low-to-mid 30s°C; the first distant thunderclouds can appear late in the month. The eastern interior’s low tree cover means strong sun exposure - carry plenty of water for any hikes. Travelers note that communities are preparing for the rains, and service levels are steady; dust is diminishing as the land begins to green.