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Best Time for Setouchi Art Islands & Shimanami Kaido
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Sweet spot: February, March, November. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
💡 Good to know
- The mildest windows for the full Shimanami ride. Reserve the bicycle and timed Naoshima art tickets, and still check wind, rain, ferry and museum notices.
- Rainy-season humidity, summer heat and the typhoon window can make the exposed 70 km ride unsafe. Start early, carry water and use the parallel bus or ferry only after checking current service.
- Cold wind and short daylight demand an early start, warm layers and a conservative fitness check. Shorten or replace the ride when conditions are poor.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | 0.8°C | 7.6°C | 55 mm | 9.9 h | ❄ |
| February | 1.3°C | 9.2°C | 71 mm | 10.7 h | ❄ |
| March | 3.6°C | 12.8°C | 101 mm | 11.7 h | |
| April | 8.2°C | 18.0°C | 114 mm | 12.9 h | |
| May | 13.3°C | 22.6°C | 141 mm | 13.8 h | |
| June | 18.1°C | 25.8°C | 208 mm | 14.3 h | |
| July | 22.6°C | 29.0°C | 231 mm | 14.1 h | |
| August | 23.5°C | 30.3°C | 140 mm | 13.3 h | |
| September | 19.8°C | 26.9°C | 189 mm | 12.2 h | |
| October | 13.9°C | 21.6°C | 130 mm | 11.1 h | |
| November | 8.3°C | 15.8°C | 73 mm | 10.2 h | |
| December | 3.0°C | 10.0°C | 72 mm | 9.7 h |