Cartagena sits on the Caribbean coast of Colombia, not far above the equator, so there is no winter or summer in the northern sense. The city is hot and humid all year, with sea temperatures that stay warm in every month. What changes is rainfall, wind, crowds and price. Choosing the right months decides whether you spend your trip walking walls in a breeze or sheltering from afternoon downpours, and it is worth knowing the trade-offs before you book flights.
The dry season, December to April
These are the most comfortable and most popular months. Rain is light and infrequent, skies are bright, and a steady sea breeze takes the edge off the heat, which is especially welcome on the exposed ramparts and at the castle. January, February and March are the peak of the peak, with the highest hotel prices, the busiest plazas and the most crowded island boats. December has a festive atmosphere around Christmas and New Year, and hotels fill up early. If you want the classic Cartagena of sunny sunsets and easy island days, this is your window, but book rooms and key tours well ahead and expect to pay for the privilege.
The wind, January to March
The same breeze that cools the city can make the sea choppy. Boat trips to the Rosario Islands and the bay may be bumpier on windy days, so bring a dry bag for electronics and take a motion-sickness tablet if you are prone to it. Mornings are usually calmer than afternoons, which is another reason to take the early departure.
The rainy season, May to October
From May the rains arrive, usually as short, intense bursts, often in the afternoon or evening, with sunshine in between. Rainfall tends to peak towards the end of the season, in September and October, and the air is heavy and humid. The advantages are real: fewer visitors, lower hotel prices and quieter streets in the old town. Organise your days so that outdoor sights such as the walls, the castle and La Popa happen in the morning, keep museums and a long lunch for the afternoon, and carry a light rain jacket or a small umbrella. A downpour can flood low streets for a short time, so wear shoes that you do not mind getting wet.
November, the transition
November sits between the seasons and is often still wet, but it brings the city's biggest civic celebration. Independence is celebrated in the second week of the month, with parades, music, beauty pageants and street parties, centred on the weekend around the 11th. The city is lively, hotels fill up, and the atmosphere is unforgettable if you enjoy crowds. If you want quiet, avoid those dates; if you want colour and noise, they are among the best days of the year to be here.
Festivals through the year
Literary visitors often time a trip for the Hay Festival, which usually takes place in late January and draws writers and readers from around the world. Film lovers can look at the dates for the city's film festival, which has run in the early part of the year. New Year's Eve is a big night out, and Holy Week in spring brings crowds of Colombian families. Dates change, so check them before you commit, and expect higher prices whenever a festival lands.
The islands and the sea
The Rosario Islands are best on calm, sunny mornings. In the dry season the water is typically clearer and the seas are bright, although the wind can raise swell. In the wetter months, rain and runoff can affect visibility, and trips are sometimes cancelled in bad weather. Whatever the month, book with an operator that will rebook you or refund you if the boats do not run, and remember that the national park requires an entry fee and mandatory accident insurance.
How to choose
For the best weather and a lively atmosphere, go between December and March and plan around the crowds and the wind. For a lower price and quieter sights, go in May or June, or in the shoulder weeks of late April and November, and accept some rain. If you want festivals, aim for late January for books or the second week of November for Independence. If you must travel in the wettest weeks, choose a hotel with a pool and a good restaurant, keep your schedule flexible and enjoy the empty plazas.
Practical tips for every season
Start early and rest in the middle of the day. Drink water constantly, wear a hat and sunscreen, and choose breathable clothing. Air conditioning matters more than the view, so check it before you book a room. Whatever the month, the walled city is at its best at the edges of the day, when the light turns gold and the heat finally lifts.
