Weather in Spain in September

September climate overview

Daytime highs across Spain in September run from 21.5°C (San Sebastian) to 30.4°C (Seville). In Seville about 90% of September days reach 25°C. Nights average 20.2°C; the coldest 10% of nights in San Sebastian fall to 12°C or below.

Rainfall in September

Expect around 5 rainy days (1 mm or more) in September, with Costa Teguise the driest (0 days) and San Sebastian the wettest (13 days). The wettest September at Seville between 1991 and 2020 was 2002 with 80 mm; the driest was 2004 with 1 mm.

Sea temperature

The sea averages 23.8°C around Spain in September - warmest at Playa de Palma (25.3°C). That is comfortable for swimming.

Sunshine and daylight

Around 7.7 hours of sunshine a day on average, out of 12.2 hours of daylight (sunshine estimated from cloud cover).

September against the rest of the year in Spain

September is the 3rd warmest month of the twelve in Spain. It is 2.6°C cooler than August and 3.0°C cooler in October. The hottest month here is August (28°C) and the coolest January (16°C).

Which part of Spain in September?

• Most sunshine: Puerto Rico, 9.3 h a day.
• Driest: Costa Teguise, about 0 rainy days.
• Warmest sea: Playa de Palma, 25°C.
• Hottest: Seville, 30°C by day.
• Coolest (better for walking and cities): San Sebastian, 22°C.

What to pack for Spain in September

Based on the averages: summer clothes for the day; a light waterproof for the odd shower; swimwear - the sea is 24°C.

Similar weather elsewhere in September

Within 1.5°C of Spain's September daytime average: Sal (27°C, sea 27°C), Rhodes (27°C, sea 26°C), Bali (27°C, sea 26°C), Rio de Janeiro (27°C, sea 22°C), Algarve (26°C, sea 21°C). See the full ranking for September.

For mainland heat, choose the south

Seville is the hottest option listed, averaging 30°C by day, with 90% of days above 25°C. That suits travellers who actively want heat, but it makes mornings a more comfortable choice for walking than midday. Nights average 19°C, so the daytime heat does not tell the whole story when packing. Costa de la Luz and Cadiz offer a slightly less hot alternative at 28°C by day, also falling to 19°C at night. Both average 4 rainy days. They are good choices if warm weather matters more than the warmest sea: their water averages 22°C, noticeably cooler than Torrevieja's 25°C.

For swimming, look at the Mediterranean options

Torrevieja is a strong fit if your priority is warm air and warm water together: daytime temperatures average 28°C and the sea averages 25°C. Benidorm, Ibiza and Altea also have 25°C seas, with slightly gentler daytime averages of 27°C. That makes them appealing for travellers who want time in the water without Seville's level of daytime heat. The catch is that a beach-focused trip still needs some flexibility. Torrevieja and Ibiza average 5 rainy days, compared with 6 in Benidorm and 7 in Altea. Keep outdoor plans movable rather than treating September as a promise of uninterrupted dry weather.

For fewer rainy days, consider these Canary Island options

Los Gigantes, Playa de la Arena and Puerto de Santiago stand out for their combination of warmth and relatively few rainy days. Each averages 28°C by day, 22°C at night and 2 rainy days, with sea temperatures of 24°C. Compared with the mainland options listed, the warmer nights are particularly useful if you prefer sitting outside without much of a cool-down. Pack light clothes for daytime and something light to put on if you feel chilly after swimming. These destinations suit travellers who place a high value on dry-weather plans, though a low rainy-day average is not a guarantee that every day will stay dry.