Key Takeaways
- ✓ Average 320 days of sunshine per year, one of Europe’s sunniest coasts.
- ✓ Summer highs of 30–35°C; winter lows rarely below 8°C at the coast.
- ✓ Sea temperatures: 14°C in February to 28°C in August.
- ✓ Only 280mm of annual rainfall, about a third of London’s total.
January & February
January and February are the coolest months on the Costa Blanca, but by northern European standards they are remarkably mild. Daytime temperatures average 15–17°C, occasionally reaching 20°C on calm, sunny days. Nights drop to 5–8°C at the coast (colder inland). You can expect 5–6 hours of sunshine per day: short days, but most of them bright and clear. Rainfall is minimal, averaging 2–3 rainy days per month.
The sea is at its coldest, 13–15°C, but a dedicated community of year-round swimmers continues daily. The promenades are popular with walkers, joggers and cyclists throughout winter. Golf courses are in prime condition and significantly less busy than in autumn or spring. This is the cheapest time for holiday rentals, with many properties offering long-stay winter rates from €450 per month.
March & April
Spring arrives early on the Costa Blanca. March sees temperatures climbing to 18–21°C with lengthening days and around 7 hours of sunshine daily. April is a turning point: consistently warm at 20–24°C, very little rain, and the sea beginning to warm past 16°C. Wildflowers carpet the hills, orange and lemon trees are in blossom, and the air carries the scent of rosemary and thyme from the garrigue scrubland.
By late April the beaches start to fill at weekends, though weekdays remain quiet. Outdoor dining becomes comfortable without a jacket. Semana Santa (Easter Week) brings Spanish domestic tourists and some price increases for the holiday fortnight, but nothing like summer peak levels. This is an excellent time for hiking, cycling, and exploring inland villages without the summer heat.
May & June
May is widely considered the single best month to visit the Costa Blanca. Temperatures range from 22°C to 27°C, the sea warms to a swimmable 19–21°C, and you get 9–10 hours of sunshine per day. Beaches are uncrowded on weekdays, rental prices are 30–40% below peak, and the landscape is at its greenest and most fragrant. Humidity is low, making the warmth extremely comfortable.
June marks the start of summer proper. Temperatures hit 26–31°C, the sea reaches 22–24°C, and daylight stretches past 9:30pm. The cultural calendar kicks in with the Hogueras de San Juan celebrations (23 June): bonfires on the beach, fireworks and parties across every town. Early June offers near-perfect conditions with summer weather but pre-peak prices and crowd levels.
July & August
The hottest and busiest months. July averages 30–34°C with virtually zero rainfall and 11–12 hours of sunshine. August is the peak: average highs of 32–35°C with heatwave spikes to 38–40°C. The sea is at its warmest: 26–28°C, like a warm bath. Humidity rises slightly but the coastal sea breeze keeps the coast more comfortable than inland towns.
Beaches are packed from 11am to 6pm, parking is challenging in town centres, and restaurant reservations are advisable at popular spots. Night markets, outdoor cinema, live music and fiestas run throughout both months. This is the peak pricing period for rentals. Expect to pay 50–100% more than shoulder-season rates. If you love heat, buzzing atmosphere and water sports, this is your time.
September & October
September is the Costa Blanca’s most overlooked month. Air temperatures of 27–30°C combine with sea temperatures of 24–26°C, making swimming conditions arguably better than in June. The crowds disappear as Spanish schools reopen, and rental prices drop 20–30% from August levels. Sunshine averages 9 hours per day. Many locals say September is the best month of the entire year.
October brings a gentle cooling to 22–26°C with the sea still at a comfortable 21–23°C. The light takes on a warm, golden quality and the evenings become pleasantly cool. Rainfall increases slightly, with October averaging 4–5 rainy days, and the first autumn storms (DANA / gota fría) can occur, usually bringing heavy but short-lived downpours. Rental prices reach excellent shoulder-season value.
November & December
November is the rainiest month on the Costa Blanca, though even then Torrevieja averages only 4–6 rainy days. Temperatures drop to 16–20°C, still warm enough for a jacket-free lunch in the sun on most days. The sea cools to 17–19°C. This is when winter long-stay visitors begin arriving, attracted by low rental prices and pleasant weather that feels like an English late spring.
December is crisp, clear and sunny with daytime temperatures of 14–18°C and 5–6 hours of sunshine per day. Christmas and New Year bring a brief spike in visitor numbers and rental prices, but the rest of the month is quiet and affordable. The Three Kings parade on 5 January is a major local celebration with sweets, floats and fireworks in every town.
What the Weather Means When You Are Viewing Property
Climate data tells you what to pack. It does not tell you what a particular flat will feel like to live in, and that gap catches a lot of buyers out. The season you view in decides what you are able to see at all.
View in summer and you learn about heat. Which rooms take the afternoon sun. Whether the terrace is usable in the middle of the day or only after dark. Whether the flat has cross-ventilation or a single aspect. How loud the neighbouring air-conditioning units are. Whether the communal pool is big enough for the number of apartments around it.
View in winter and you learn about everything else. Whether the place is damp. Whether it holds heat after sunset. Whether north-facing rooms ever see direct sun. Whether the road drains. Whether the urbanisation has any lights on at all. A property that shows beautifully in July can be a cold, dark, empty place in January, and no listing photograph distinguishes the two.
If you can only view once, view in the colder half of the year and imagine the summer rather than the other way round. Summer is the easier half to imagine. Ask specifically about drainage and any history of water ingress while you are there. The autumn storm pattern known here as a DANA is the one weather event on this coast that does real damage to buildings, and it deserves its own read: see our guide to flood risk and DANA on the Costa Blanca.
Which Towns Stay Alive in Winter
The biggest variable in how a Costa Blanca winter feels is not the weather. It is whether anyone else is there. Two towns can share an identical climate and offer completely different Januaries, depending on whether their housing is lived in or shuttered.
Our own book is not a census, and inventory depth on its own is not a measure of winter life. A large resort with heavy turnover generates listings too. What it does show is where the market is deep enough to give you genuine choice, and which towns carry enough transactions to sustain year-round services.
| Town | Live listings | Median asking price |
|---|---|---|
| Torrevieja | 250 | €260,000 |
| Pilar de la Horadada | 103 | €355,000 |
| Finestrat | 82 | €635,000 |
| Calpe | 58 | €670,000 |
| Rojales | 57 | €430,000 |
| Orihuela Costa | 48 | €297,000 |
| Guardamar del Segura | 44 | €332,500 |
| San Miguel de Salinas | 41 | €319,900 |
Torrevieja is the clearest case: 250 live listings, the deepest book on this coast by a wide margin, spread from €89,900 studios to family villas. That spread reflects a town with a large permanent population rather than one season. Pilar de la Horadada and Guardamar del Segura repeat the pattern at smaller scale. Finestrat and Calpe carry much higher medians at €635,000 and €670,000, which tells you about the kind of property on offer, not about how busy the high street is in February.
The real test is not in any dataset. Walk a street on a weekday in January and count what is open: the health centre, the weekly market, the bus timetable, whether the supermarket is stocked for residents or holidaymakers. That half-hour will tell you more than any amount of climate data. We have written up what a winter here is actually like in our guide to wintering on the Costa Blanca, and the sheltered-town question separately in the warmest Costa Blanca towns in winter.
What a Long Stay Asks of the Property
Spanish coastal housing is built and marketed around cooling, not heating. Across our whole live book of 2,108 listings, which spans both the Costa Blanca and the Costa del Sol, 1,537 flag air conditioning. Only 255 flag double glazing and only 222 flag underfloor heating. A further 359 carry an energy rating of G, the lowest band.
Those flags come from listing data and will undercount: a flat can have double glazing that nobody thought to write down. But the direction is unambiguous, and it matters most to exactly the people who come for the mild winters. A home designed to shed heat is a home that does not hold it, and the difference between a pleasant January indoors and an uncomfortable one is usually glazing, orientation and a working heat source rather than the temperature outside.
So a long-stay buyer should ask different questions from a holiday buyer. Is there a heat source that is not a plug-in radiator. Reverse-cycle air conditioning counts, and is the most common answer here. Do the windows seal, and are they double glazed. Which way does the main living space face, because a south or west aspect earns its keep between November and March. Is there insulation above a top-floor flat. And is the communal pool heated, because an unheated one is decorative for half the year.
Six Months or Twelve
The gap between wintering here and living here is mostly about what breaks. A home used for six months tolerates things a full-time one does not: shutters that stick, a temperamental water heater, damp in a spare room. Full-time living finds all of it. It also changes what you want from the location: a six-month visitor can live somewhere quiet and drive for everything, while a full-time resident ends up wanting a pharmacy, a health centre and a bus stop on foot, and will trade a view for them.
That decision is worth making before you buy rather than after, because the two shortlists barely overlap. Browse what we hold across the coast at properties for sale and tell us how many months a year you expect to be here. It changes the shortlist more than the budget does.