August in Tønsberg averages a daily high of 21.1°C with nights around 12.1°C. Expect roughly 15.4 wet days totalling 115.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Tønsberg is June–September.
Based on MELSOM, NO (5.4km), 1995–2024. 23 years of August data.