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Weather on the Costa Blanca by Month

Weather on the Costa Blanca by Month

Tijn Strikker
Tijn Strikker
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Founder
For Guests
7
min read
December 1, 2025
Pool and palm trees between townhouses on the Costa Blanca in full sun
Key takeaways

Air temperature and sea temperature run about two months out of step, which catches people out. May, June, September and October are the best value months on this coast. The sea is warmest in August and September, not July. Winter daytime highs sit in the mid teens, which is why so many owners come out in January.

People book this coast on the strength of one number: 300 days of sunshine. It is broadly true, and it is also not very useful when you are trying to decide between April and October.

Here is what the year actually feels like, from people who are here for all of it.

The short version

MonthDaytimeSeaRain
January12 to 17C14CLow
February13 to 18C14CLow
March15 to 20C15CLow to medium
April17 to 22C16 to 17CMedium
May20 to 25C18 to 20CLow
June24 to 28C22 to 24CVery low
July26 to 32C25 to 27CVery low
August27 to 33C26 to 28CLow
September24 to 29C25 to 27CMedium
October20 to 26C22 to 24CMedium to high
November16 to 21C18 to 19CMedium
December13 to 18C15CLow

Winter, January to March

Daytime highs in the mid teens, cold enough at night that you will want the heating on, and almost always sunny. This is when a lot of our owners come out themselves. You can walk, play golf, eat outside at lunchtime and not see a crowd anywhere. You will not be swimming in the sea.

March is the turn. By the end of it the terraces fill up again.

Spring, April to June

April is pleasant but can throw a wet week at you. May is close to perfect: low twenties, barely any rain, and the sea has warmed enough that brave people get in. June is properly summer without August prices or August crowds.

If someone asks us when to come and has no fixed constraints, we say May or June.

Summer, July to September

July and August are hot. Not pleasantly warm, genuinely hot, with highs into the low thirties and nights that stay warm. Air conditioning stops being a nice extra and becomes the reason you sleep. Everything is open, everything is busy, everything costs more.

September is the quiet winner. The air starts easing back into the twenties while the sea is still at its warmest of the year, the schools have gone home, and the restaurants are no longer three deep. If you can travel in September, do.

Autumn, October to December

October is still a beach month, with the sea in the low twenties, though it brings the heaviest rain of the year. When it rains here it does it properly and then stops, so a wet day is usually a wet few hours.

November and December settle into that mild, bright winter pattern again. Christmas on a terrace in sixteen degrees is one of the things that persuades people to buy here.

The thing most people get wrong

Air temperature and sea temperature are out of step by roughly two months. The air peaks in August, the sea peaks late August into September, and in May the air can feel like summer while the water is still bracing. If swimming matters to you, read the sea column, not the air one.

Why this matters if you own here

The weather is the reason the shoulder season on this coast is longer than almost anywhere else in Europe, and the shoulder season is where owner income is won or lost. July and August fill themselves. May, June, September and October are the months that separate a property doing eighty percent occupancy from one doing fifty.

If you own something here and your winter is empty, that is usually a marketing problem rather than a weather problem. Happy to talk it through: +34 658 235 481 or info@casacapitals.com.

Homes behind this article

A couple of the properties we actually manage on the Costa Blanca.

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