Spain is a southwestern European country, 505,990 km² with population of 48 million — the fourth-largest country in Europe by area. The country occupies most of the Iberian Peninsula, sharing borders with Portugal (west), France and Andorra (northeast), and the British territory of Gibraltar (south at the famous Strait of Gibraltar). Spain also includes the famous Balearic Islands (Mallorca, Menorca, Ibiza, Formentera) in the Mediterranean, the famous Canary Islands in the Atlantic off the northwestern African coast, and two North African enclaves (Ceuta and Melilla). Spain was the famous global empire builder of the 16th-17th centuries — the famous "Spanish Empire" was the world's first global empire, ruling territories from the Americas to the Philippines. The country was ruled by Francisco Franco's authoritarian regime from 1939-1975 and transitioned to democracy through the famous "Spanish transition" under King Juan Carlos I (now King Felipe VI). Spain joined the EU in 1986 and is now the world's second-most-visited country (85 million visitors in 2024).
Major destinations include Barcelona (the famous Catalan capital — population 1.6 million, 5.6 million metropolitan, with the famous Antoni Gaudí architectural masterpieces including Sagrada Família — the famous still-under-construction basilica started 1882 with completion planned for 2026 Gaudí centennial, Park Güell, Casa Batlló, Casa Milà, the famous Gothic Quarter (Barri Gòtic), the famous La Rambla pedestrian boulevard, the famous Picasso Museum, the famous Camp Nou FC Barcelona stadium, and extensive beach culture), Madrid (the capital and Spain's largest city — population 3.3 million, 6.7 million metropolitan, with the famous Prado Museum housing extensive Velázquez, Goya, and El Greco collections, the famous Reina Sofía Museum housing Picasso's "Guernica," the famous Plaza Mayor, the famous Retiro Park, the famous Royal Palace, the famous Puerta del Sol, and extensive flamenco and tapas culture), Seville (the famous Andalusian capital with the UNESCO Royal Alcázar, the famous Cathedral and Giralda Tower — the world's largest Gothic cathedral, the famous Plaza de España built for the 1929 Ibero-American Exposition, and the famous Triana flamenco district), Granada (with the famous Alhambra — UNESCO World Heritage Moorish palace complex), Córdoba (with the famous Mezquita-Catedral — UNESCO Moorish mosque-cathedral), Toledo (UNESCO World Heritage hilltop medieval city), Valencia (with the famous City of Arts and Sciences and the famous La Tomatina festival in nearby Buñol), Bilbao (with the famous Guggenheim Museum), San Sebastián (the famous Basque Country culinary capital with extensive pintxos culture and three Michelin-three-star restaurants — Akelaŕe, Arzak, Martín Berasategui), the famous Costa del Sol (Marbella, Málaga), the famous Mallorca and Ibiza (Mediterranean islands), the famous Canary Islands (Tenerife, Gran Canaria, Lanzarote, Fuerteventura), Santiago de Compostela (the famous Camino de Santiago pilgrimage endpoint), the famous Pamplona (with the famous Running of the Bulls in July), the famous Ronda mountaintop town, and the famous Galician Rías Baixas seafood region.
Spain has more climate variation than its surface size suggests. The Mediterranean coast has mild winters and hot summers tempered by sea breezes. The interior plateau bakes in summer and freezes in winter. Andalusia is the hottest region in summer, regularly cresting 45 °C, and remarkably pleasant in winter. The Atlantic north is green, mild, and surprisingly wet year-round.
Quick verdict
Best overall: May, early June, mid-September, and October. Perfect across most of the country simultaneously.
Best for Andalusia (Seville, Cordoba, Granada): March-May or October-November. Avoid July-August.
Best for the Mediterranean coast: Late May through June, and September. Avoid the August holiday crush.
Best for the Atlantic north (Basque Country, Galicia): June through September.
Avoid if you can: Madrid and Andalusia in July-August (genuinely extreme heat).
Spring (March to May): the country at its best
March is unpredictable. Andalusia is already pleasant (18-22 °C) and the wildflowers are spectacular in the south. Madrid and Barcelona are still cool (15-18 °C). The northern coast is wet. Seville's orange trees bloom in late March and the city smells of orange blossoms for two weeks — one of the great sensory experiences in European travel.
April brings Holy Week (Semana Santa) — the most important religious holiday and a massive draw. Seville, Malaga, and Granada host extraordinary processions but are absolutely packed; book hotels six months ahead. Costs spike during the week. Weather in April is genuinely lovely across most of Spain — 18-24 °C in the south, 16-22 °C in Madrid.
May is consistently excellent. Wildflowers everywhere, comfortable temperatures, all coastal areas open, manageable crowds outside special events. Las Fallas in Valencia (March 15-19) and the April Fair in Seville (two weeks after Easter) and San Isidro in Madrid (mid-May) are major local festivals.
Summer (June to August): the heat is real
Early June is still pleasant — 22-28 °C in most places, beaches are warming up. By mid-June, interior Spain (Madrid, Toledo) is climbing into the 30s. The Mediterranean coast remains in the 26-30 °C range with sea breezes. Sea temperature reaches 22-23 °C — swimmable.
July and August are the season most international travelers default to and most experienced Spain travelers actively avoid. Madrid regularly hits 37-40 °C with no sea breeze. Andalusia is brutal — Cordoba and Seville sit in the 40-45 °C range. The Costa del Sol is packed; Barcelona at peak summer is gridlocked with cruise tourists.
The Atlantic north is the saving grace of Spanish summer. San Sebastian sits at 22-26 °C with cool evenings. Galicia gets its best weather of the year, and the Pyrenees are open for hiking. If you must visit in July-August, head north or to the islands (Mallorca, Ibiza).
Autumn (September to October): the southern shoulder
September is excellent. The interior heat breaks meaningfully by mid-month — Madrid drops back to 24-28 °C, Andalusia to 28-32 °C. Mediterranean sea temperatures stay at 23-24 °C through the month, often warmer than June. Tourist crowds drop sharply after the first week.
October is for many seasoned Spain travelers the single best month. Andalusia is at its prime — Seville and Cordoba in the comfortable 22-26 °C range, light golden, oranges starting to ripen. Barcelona stays pleasant into late October. Wine harvest is in full swing across La Rioja, Ribera del Duero, and Penedes.
Winter (November to February): cheap, atmospheric, and cold in the middle
November is shoulder. The first half is often beautiful; the second half can turn wet. Mediterranean coast remains 14-18 °C. Andalusia stays surprisingly pleasant (16-20 °C in Seville). Madrid drops to 10-14 °C.
December through February is real winter in interior Spain. Madrid can hit -5 °C overnight; daytime is 8-12 °C. Snow is possible. The Sierra Nevada offers skiing within 30 minutes of Granada. Barcelona stays mild thanks to the coast. Andalusia continues to be the warmest region — Seville winter days are typically 16-19 °C, perfect for sightseeing without crowds.
Winter is the cheapest and quietest time in Spain outside Christmas. The famous sites are nearly empty. Hotel rates drop 40-60% from summer peaks (excluding Christmas-New Year).
Regional specifics
Andalusia (Seville, Cordoba, Granada, Malaga): The most "winter destination" part of Spain. November-March is excellent. April-May for wildflowers. October for golden light. Avoid June-August.
Barcelona: Mild year-round. Best May-June and September-October. Hot but not extreme in summer thanks to Mediterranean. Crowded everything May-September.
Madrid: Best April-May and October. Cold December-February, hot June-August.
Basque Country (San Sebastian, Bilbao): Best June-September. Wet and mild rest of the year.
Mallorca / Balearics: Best May-June and September-October. Hot July-August with party scene crowds.
Canary Islands: 365-day spring weather. Best in winter as escape from European cold; warm year-round at 20-26 °C.
Festivals to plan around or avoid
Las Fallas in Valencia (March 15-19). Semana Santa (varies by year) — Spain's biggest religious week, biggest in Seville. Feria de Sevilla (two weeks after Easter). San Fermines / Running of the Bulls in Pamplona (July 6-14). La Tomatina in Buñol (last Wednesday of August). San Sebastian International Film Festival (September). Madrid's Christmas market opens late November.
Verdict by traveler type
First-time visitor doing Barcelona + Madrid + Seville: Mid-May or early October.
Andalusia focused: March-May or October-November.
Beach holiday on Costa Brava or Mallorca: Late May through June, or September.
Photographer: Late October for golden light in Andalusia, or April for spring color.
Budget traveler: February (excluding Carnival) or November.
Food and wine focused: September-October for harvest, or November-December for game season and truffles.
Hiker (Pyrenees, Picos de Europa): Late June through September.
Bottom line
Spain in summer is a country that doesn't quite work for the experiences most travelers come for. Walking medieval cities in 42 °C, exploring Andalusian villages with no shade, getting lost in Madrid's narrow streets — these are spring and autumn activities. The country has a longer comfortable season than most of Europe, making Spain unusually flexible for travelers willing to skip the peak months.