August in Santander averages a daily high of 23.2°C with nights around 17.6°C. Expect roughly 10.5 wet days totalling 54.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Santander is June–October.
Based on SANTANDER CMT, SP (2.9km), 1995–2024. 29 years of August data.