Denia weather by month

When to go to Denia

For beach weather, look at months where the daytime average clears 25°C and rainy days stay low: June, July, August, September. September is the wettest month (74 mm, about 8 rainy days) and July the driest (8 mm). The sea is warmest in August at 26.2°C and coolest in February at 13.6°C.

Getting there

A direct flight from London Gatwick to Alicante-Elche Miguel Hernández Airport (ALC, 85 km from Denia) takes roughly 2 h 30 min - short-haul (up to 4.5 h) by UK standards. Time-zone: Europe/Madrid.

Records and extremes, 1991-2020

The hottest day recorded in Denia between 1991 and 2020 reached 37.0°C on 9 August 2019; the coldest fell to 2.2°C on 15 February 1999. In August one day in ten tops 31.2°C and about 27% of days pass 30°C; in January one night in ten drops to 6.4°C or below. The wettest single month of the period was October 2007 with 282 mm, against a October average of 71 mm.

Winter and spring: comfortable for walking, cool for swimming

Winter suits travellers who want mild daytime weather rather than a beach holiday. December averages 16°C by day, while January and February sit at 15°C, with nights cool enough to need a jacket. March reaches 17°C and April 19°C, making outdoor plans more comfortable, though layers remain useful when the sun goes in. May offers a clearer step towards summer at 22°C by day and 16°C at night. The catch throughout this stretch is the water: the sea stays at 14°C from January through March and reaches only 18°C in May, so it may still feel chilly for a leisurely swim. Rain is possible throughout, so pack a light waterproof alongside sunglasses rather than relying on an entirely dry stay.

Summer: the driest weather and warmest evenings

June offers a useful balance for travellers who like warmth without choosing the hottest month. Daytime averages reach 26°C, the sea reaches 22°C and rain is relatively infrequent. July is the driest month, with 12 hours of sunshine a day on average, making it the clearest choice for sun-focused plans. August is hotter, averaging 29°C by day, and its 26°C sea is the warmest of the year. Nights also stay warm, averaging 22°C in July and 23°C in August, so lightweight clothing is useful after dark. Plan anything energetic for earlier or later in the day, and leave room for shade around midday.

Autumn: warm water, but less reliable dry weather

September still feels summery in the averages, with days at 26°C and sea water at 25°C. It suits travellers who value swimming warmth more than the lowest chance of rain: September and October both average 8 rainy days. October is gentler for daytime activity at 22°C, with the sea also averaging 22°C, although evenings call for an extra layer. By November, daytime temperatures ease to 18°C and nights to 13°C, shifting the emphasis towards walks and flexible outdoor plans rather than long days in swimwear. Keep a waterproof handy and avoid making every day's enjoyment depend on clear skies, especially if travelling later in autumn.