Colombia in September: Weather, Crowds & What to Expect

Caribbean Coast (Cartagena, Santa Marta, Barranquilla, Rosario Islands)

September is often one of the wetter months on the Caribbean side, with sustained heavy rains inland that can cause urban puddling in Cartagena and occasional mud on Tayrona’s trails. Sea conditions can be rougher, and small-boat schedules may be reduced; snorkeling visibility drops after freshwater runoff. Travellers should allow extra travel time between towns and consider staying closer to parks when hiking is a priority.

Pacific Coast & Chocó (Nuquí, Bahía Solano, Quibdó)

September is wet and raw in the Chocó lowlands, but biodiversity is at a peak with continuous river flows and thick canopy life; birding and amphibian spotting are outstanding if you can handle the elements. Local communities sometimes limit access during exceptionally heavy weeks, so confirm itineraries in advance. Travelers should prioritize waterproof packing and flexible schedules.

Andean Highlands (Bogotá, Medellín, Coffee Triangle, Cali)

September often brings the start of the second rainy pulse in higher elevations: afternoon storms become more frequent in Bogotá and Manizales, and long-distance bus rides can be slowed by slick mountain roads. Lower valleys like Cali remain warm and energetic. Travelers aiming to hike should check local forecasts and trail conditions; packing waterproof boots and quick-dry clothing is sensible.

Los Llanos (Eastern Plains)

September begins the gradual drying of the plains: shallow waters retreat and trails reappear, but patches of floodplain remain. Birdwatching is excellent as the landscape concentrates species, and overland routes slowly open up. Temperatures remain warm, but nights get slightly cooler; this month is useful for combining boat and vehicle-based tours as access improves.

Amazon Basin (Leticia, Puerto Nariño, Amacayacu)

September begins a gradual return to the wetter phase with afternoon showers increasing and river levels starting to rise, though not yet at their peak. Boat navigation remains good, but some trails become muddier; guides adapt by shifting activities to mornings and early evenings. Expect great birding and fewer tourists than in July-August, a good time for photographers seeking solitude.