Barcelona Weather

While the UK’s maritime climate delivers changeable rain even in summer, Barcelona enjoys a Mediterranean climate with over 300 days of sunshine a year. The live forecast above gives you current conditions; expect summer highs of 28–30°C from June to August and mild winters around 15°C, with most rain falling in autumn.

What does the live forecast tell a traveller?

The live conditions above show real-time temperature, wind, and precipitation for Barcelona. For most visitors, the key numbers are the daily high and the chance of rain. In summer, temperatures regularly reach the high‑20s with low humidity; in winter, the highs hover around 14–16°C. The widget updates automatically, so you can check before heading out – but for planning, the long‑term averages below are more useful.

Barcelona climate month‑by‑month

Barcelona’s seasons are clearly defined. Summer (June–August) is hot and dry, winter (December–February) is mild and relatively wet, and spring and autumn are warm with occasional showers. The sea temperature follows the air, peaking around 25°C in August.

January is the coolest month, with average highs of 14°C and lows of 8°C. February is similar but slightly drier. By March, spring warmth starts – highs reach 17°C, and rainfall begins to fall. April and May see temperatures climb to 20°C and 24°C respectively, with the sea warming enough for swimming by late May.

June brings consistent summer heat: highs average 28°C, sea temperature hits 22°C, and there is barely any rain. July and August are the hottest, with daily highs of 30°C and sea temperatures exceeding 25°C. September remains warm (highs around 27°C) but marks the start of increased rainfall – a transition month many visitors favour for lower crowds and still‑pleasant conditions.

October cools to 23°C, with heavier rain (about 70mm). November and December are cooler (highs 18°C and 15°C) and cloudier, though still far milder than most of the UK.

How does Barcelona compare to Madrid?

If you have checked the BBC Weather Madrid forecast, you’ll know the capital is hotter in summer (often above 35°C) and colder in winter, with a pronounced dry season. Barcelona, by contrast, is moderated by the Mediterranean Sea – summers are milder (rarely above 33°C) and winters are warmer, but with more humidity. The sea breeze also keeps coastal areas fresher during heatwaves.

Barcelona weather in September: what to expect

September is one of the best months to visit. Average highs are 27°C, sea temperatures remain at 24°C – perfect for swimming – and sunshine still averages eight hours a day. Rainfall starts to increase (about 50mm spread over five or six rainy days), but showers are usually short. If you are checking a weather Barcelona 21‑day forecast in early September, you will likely see mostly dry, warm days with the odd thundery episode.

For a 14‑day or 10‑day outlook, the 10‑day forecast on this site is more accurate than longer‑range projections. The 30‑day or 21‑day predictions can hint at trends but should be treated as guides, not guarantees.

Best months to visit

For beach weather, June, July, August and September deliver the highest sea temperatures and most sunshine. For sightseeing without the intense heat, May and October are excellent: highs of 22–24°C, lower humidity, and fewer tourists. April can also be pleasant, though the sea is still cool.

Rainy season and quiet season

Barcelona’s rainiest period runs from September to November, especially October (around 80mm). December through February also see moderate rainfall, but the total is still low compared to UK averages. The quietest tourist season is December to February, when prices drop and attractions are less crowded – though temperatures are too cool for swimming.

What to pack for Barcelona

In summer (June–September): lightweight clothing, a sun hat, high‑SPF sunscreen, and swimwear. Evenings are warm, so a light jacket is rarely needed. In autumn and spring: layers, a rain jacket or umbrella, and a jacket for cooler evenings. In winter: a warm coat, scarf, and comfortable shoes – but you will not need the heavy gear you would for a UK winter. For any trip, include comfortable walking shoes for the city’s hilly streets.

Long‑range forecasts: what they are worth

Weather Barcelona 30‑day forecasts and 21‑day outlooks can indicate whether a spell of settled or unsettled weather is likely, but day‑by‑day accuracy beyond ten days is low. For reliable planning, use the 10‑day forecast on this site, and check the live conditions above the morning you travel. Barcelona’s Mediterranean climate is generally predictable, but occasional autumn storms can disrupt beach plans.

If you are also considering other European destinations, our guides to Marrakech weather and Paris weather offer useful comparisons for holiday planning.