August in Yokosuka averages a daily high of 31.4°C. Expect roughly 9.6 wet days totalling 124.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Yokosuka is April–June.
Based on YOKOHAMA, JA (16.7km), 1995–2024. 24 years of August data.