August in Sant Martí averages a daily high of 29.1°C with nights around 21.6°C. Expect roughly 5.4 wet days totalling 50.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Sant Martí is May–July.
Based on BARCELONA AEROPUERTO, SP (17.6km), 1995–2024. 30 years of August data.