Weather in Cartagena in March

Prime time. If you get to pick your dates, March is the one. Highs average 18.6 °C, lows 11.5 °C, and rain falls on 5 days — nothing in the month is working against you.

Cartagena barely has seasons. March scores 86 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 5 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 March reaches 30 °C. Across the twenty years measured, the hottest March day reached 27.3 °C and the coldest night fell to 4 °C, and the wettest single day dropped 50 mm — roughly 143% of the month's rain in one day.

March is moderately variable: 4 mm in the driest year against 116 mm in the wettest, around an average of 35 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind is light at 12.5 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 70%.

How March sits in the year

The month is on the way up: 1.8 °C warmer than February, and April adds another 2.1 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in March

11.9 hours of daylight, gaining 1.2 hours across the month. That is between Cartagena's extremes of 14.7 and 9.6 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 15.1 °C in March — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. 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

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

March 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 — 2.7 °C warmer, 1 day less rain. Valencia is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: March works, with May the better month by 9 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Cartagena

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