Weather in Costa Blanca in March

How March compares

March is the 9th warmest month of the year in Costa Blanca. Within Spain it is 35th of 87 (Spain in March). Against London's average high of 10.5°C in March, Costa Blanca is 7.1°C warmer by day and 6.7°C warmer at night.

Daytime and night-time in March

The typical March day in Costa Blanca peaks at 17.6°C, but that is an average: the warmest 10% of days reach 21.5°C or more. Roughly 1 in 100 days top 25°C. Nights average 10.0°C; one night in ten drops to 7.0°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest March day here reached 30.8°C (2017-03-10) and the coldest night 0.6°C (2005-03-08).

Rain in March

Some rain (4-8 rainy days): about 6 days with 1 mm or more, 41 mm in total. Year to year it varies a lot - the wettest March was 2020 with 146 mm, the driest 2014 with 1 mm. Humidity averages 68%.

Sea temperature in March

The sea averages 14.3°C - too cold for most (under 18°c). Depending on the year it ranges from 13.5°C to 15.1°C. For the warmest sea here, come in August (26.4°C).

Sunshine and daylight

Around 6.7 hours of sunshine a day (estimated from cloud cover), 11.7 hours of daylight: the sun rises about 07:13 and sets about 19:09 local time in mid-March. Average cloud cover is 43%.

Is March a good time to visit Costa Blanca?

March is not the strongest month here: mild days. The best months for Costa Blanca on our scoring are July, June, August; months averaging 25°C or more: Jun, Jul, Aug, Sep.

Warmer than London, but not reliably hot

Costa Blanca's average daytime high is 7.1°C above London's March figure of 10.5°C, a useful difference if you want to spend more time outside. The warmest days reach 21.5°C or more, so lighter clothes can be useful around midday. That is not the same as dependable heat: only 1% of days reach 25°C. Pack layers rather than relying on shorts and T-shirts throughout your stay. Evenings need a warmer layer, and the coldest nights fall to 7°C or below. March suits walking and relaxed outdoor plans better than a trip where hot weather is essential.

Useful sunshine, with room for wet-weather plans

March brings about 6.7 hours of sunshine within 11.7 hours of daylight, giving you a useful window for outdoor plans without suggesting clear skies all day. There are about 6 rainy days during the month, so rain is something to allow for rather than a reason to rule the trip out. A light waterproof is a sensible addition to your bag, alongside layers you can remove when the sun comes out. Keep your plans flexible enough to swap an outdoor afternoon for time indoors if needed. This is a reasonable month for travellers who can enjoy mild weather without needing uninterrupted sunshine.

The sea is the main compromise

At 14.3°C, the sea is cold, not merely a little fresh. The March range of 14°C to 15°C leaves little reason to expect comfortable swimming even in a warmer year. You may enjoy sitting by the sea when conditions feel pleasant, but do not make long swims the purpose of the holiday. A warm afternoon can make the coast inviting without making the water comfortable. If your priority is time outdoors in mild air, that trade-off may be fine. If swimming is central to your plans, March is a poor fit, regardless of how sunny the day looks.