Weather in Cartagena in May

Prime time. If you get to pick your dates, May is the one. Highs average 23.7 °C, lows 16.5 °C, and rain falls on 3 days — nothing in the month is working against you.

Cartagena barely has seasons. May scores 95 out of 100 against a best of 95 in May — a gap small enough that the month you choose matters far less here than the week you choose.

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average May reaches 30 °C. Across the twenty years measured, the hottest May day reached 31.1 °C and the coldest night fell to 10.6 °C, and the wettest single day dropped 27 mm — roughly 169% of the month's rain in one day.

This is the volatile part. May rainfall has ranged from 1 mm to 60 mm across the twenty years measured — a 59 mm spread around an average of 16 mm. The average is real but almost no individual May looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 11.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 66%.

How May sits in the year

The month is on the way up: 3 °C warmer than April, and June adds another 4.1 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in May

May is at or near the longest days of Cartagena's year: 14.2 hours of daylight, gaining 0.9 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 18.5 °C in May — swimmable, but it takes a moment to commit. The sea peaks at 25.7 °C in August and bottoms out at 14.7 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, October is the trade worth considering — 6 points weaker on weather, and materially quieter.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

May in Cartagena versus nearby

If Cartagena is one option among several, the nearby comparison is worth making. Murcia is close enough to be a coin toss — 4.3 °C warmer, 1 day more rain. Valencia is close enough to be a coin toss — 3.3 °C warmer, 3 days more rain.

So: May is the answer for Cartagena. If it is booked out or priced out, June is the next best thing at 0 points behind, and January is the month to keep off the shortlist.

Every month in Cartagena

See all twelve months in Cartagena, or where else to go in May.