Hot in Sep
31°C average high
avg high · 19° at night
25°C+ on almost every day
Spain
Alicante & Costa Blanca weather in September
Is it warm? Yes. September in Alicante & Costa Blanca is warm: afternoons average 27°C and nights 21°C. Most days (80%) peak between 25°C and 30°C.
Warm · average high
27°C
25°C or more on about nine in ten days; 20°C or more on almost every day.
- Average low21°overnight
- Sea26°average, 2023–2025
- Rainy days443 mm in the month
- SkySome cloud41% cloud · 39% clear days
How warm it really gets
Every September afternoon from 2011–2025: 450 days. Most (80%) peaked between 25° and 30°.
September, year by year
The average September high in each year. The warmest, 2022, averaged 29°C; the coolest, 2015, 26°C.
Compared with home
Average September highs. Expect rain on about 4 days (43 mm in a typical month).
- Alicante & Costa Blanca27°
- London19°
- Manchester17°
- Dublin17°
- Cork17°
- Belfast16°
- Glasgow16°
Warmer in September, not much further
Flying times are estimates from Dublin; Alicante & Costa Blanca is about 2h 30m.
Hot in Sep
29°C average high
avg high · 22° at night
25°C+ on almost every day
Hot in Sep
33°C average high
avg high · 18° at night
25°C+ on almost every day · often 35°C+
Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology