August in Miyakojima averages a daily high of 31.2°C. Expect roughly 14.9 wet days totalling 291.3mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Miyakojima is October–May.
Based on MIYAKO, JA (1.8km), 1995–2024. 17 years of August data.