Weather in Barcelona in March

Prime time. If you get to pick your dates, March is the one. Highs average 18.3 °C, lows 8 °C, and rain falls on 7 days — nothing in the month is working against you.

March ranks 4 of 12 in Barcelona: past the worst of the year but short of April, which is the month to book if the dates are open.

Rain on 7 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. 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 28.2 °C and the coldest night fell to -1.9 °C, and the wettest single day dropped 44 mm — roughly 102% of the month's rain in one day.

March is moderately variable: 5 mm in the driest year against 103 mm in the wettest, around an average of 43 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind is light at 9.3 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: 2.9 °C warmer than February, and April adds another 2.7 °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 1.4 hours across the month. That is between Barcelona's extremes of 15.1 and 9.2 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 13.5 °C in March — too cold to swim without a wetsuit. The sea peaks at 25.5 °C in August and bottoms out at 13.2 °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

Busy. Popular without being frantic; book the things you care about, improvise the rest.

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

March in Barcelona versus nearby

If Barcelona is one option among several, the nearby comparison is worth making. Palma is the weaker option in March — 3.3 °C cooler, the same number of rain days. Toulouse is the weaker option in March — 3.7 °C cooler, 6 days more rain.

So: March is effectively as good as it gets here — 4 points behind April, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Barcelona

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