Start here: it is hot, always, and you cannot dress your way out of it
Pack linen, cotton and loose cuts, and nothing else. Cartagena's temperature typically sits between 76F and 88F across the whole year, rarely dropping under 73F or climbing past 91F, so there is no season here you need a jacket for. What the numbers don't show is the humidity, which is the part that actually decides your outfit. A tight synthetic shirt at 84F feels like a punishment. The same temperature in a loose linen shirt is a pleasant afternoon.
The practical version: two or three outfits fewer than you think, in fabrics that dry, plus a swimsuit you can wear more than once a day.
Shoes: flat, closed enough to walk in, ruined-proof
Wear flats. The Old Town is paved in uneven stone and the walls are worse, and heels lose that argument every time. We have watched a lot of people cross Plaza de San Diego at a very specific slow angle, and it is always the shoes.
What works: leather sandals, canvas trainers, anything with a flat sole and a bit of grip. What doesn't: block heels, brand new white trainers in October, flip-flops on a night out. Bring one pair you'd happily get wet, because in September and October the rain arrives hard, empties the sky in an hour, and leaves puddles on the stone.
Daytime, inside the walls
Cover your shoulders if you burn. There is very little shade in the streets between about 11am and 3pm, and the walls themselves have none at all, which is why we tell everyone to walk them at sunset instead of at noon. A hat earns its luggage space here more than anything else you'll pack. So does a light long-sleeved shirt, which sounds mad in this heat and is the single best thing to walk around in.
Churches ask for shoulders and knees covered, so a scarf or a shirt in the bag saves you a trip back.
Nights out, and what people actually wear on a rooftop
Smart, light, no jacket. Cartagena's evenings are dressier than the daytime without being formal: linen shirts, dresses, decent sandals. Men in shorts are common and nobody minds; men in a shirt look like they meant it. It stays warm after dark, so anything you'd wear for an evening at home is probably too heavy.
Our rooftop is adults only after 8pm, and Members Only kicks off around 9 on Friday and Saturday. It gets loud up there after dark. That's the point, and it's also the answer to what to wear: whatever you'd put on for a party, not for a quiet dinner. If you want the quiet dinner version, the same rooftop earlier in the evening is a different place entirely.
Beach and pool days
Bring two swimsuits. One is always damp. Between late December and mid March the weather is at its best for beach and pool days, which is exactly when the city is busiest, so you'll be in a swimsuit more of the trip than you expect.
A cover-up you can walk to lunch in saves changing twice. Sunscreen is easier to bring than to buy at a beach-side price, and reef-safe if you're heading out to the islands.
The month-by-month bit
| When | What changes | Pack |
|---|---|---|
| Late December to mid March | Driest and breeziest stretch, best beach weather | Swimsuits, light layers for wind on the walls |
| April to August | Hot and increasingly humid | Loosest fabrics you own, hat, second shirt for the day |
| September and October | Heaviest rain, usually in short bursts | Sandals you can wet, quick-dry clothes, small umbrella |
| November | Independence festivities, crowds, paint and foam in the streets | Clothes you don't love, closed shoes |
What to leave at home
Jeans, unless you're wearing them on the plane. Anything that needs ironing. A heavy jacket for the flight home, which you will carry for a week and use for forty minutes. Loud jewellery, mostly because a phone or a chain in your hand on a busy street is the thing most likely to get lifted, and there's no reason to make the decision harder for yourself.
What to bring that people forget: a second pair of flat shoes for when the first pair gets soaked, and one shirt you actually like, for the night the trip turns out better than planned.