Kii ŌshimaKii Ōshima at a Glance#
When to Go
Best Time to Visit Kii Ōshima#
Maritime climate moderated by the Kii Peninsula; late spring to autumn is best for coastal access.
Late spring-autumn
May-October · 15-28°C (59-82°F)
Pleasant coastal conditions and active fishing communities.
Winter
December-February · 5-12°C (41-54°F)
Cooler and quieter-some tourist services reduced.
Weather & Climate near Kii Ōshima#
Climate
Kii Ōshima's climate is classified as Humid Subtropical - Humid Subtropical climate with hot summers (peaking in August) and cold winters (coldest in January). Temperatures range from 4°C to 29°C. Heavy rainfall (2444 mm/year), wettest in June.
Air Quality:
AQI 45
Good
Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
34°
Warmest Month
-1°
Coldest Month
Monthly Conditions
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Acceptable | 5° - 11° | 5° | 88 mm | partly cloudy | 76% | 4.5 m/s | 0.5 low | 10.1h |
| February | Acceptable | 4° - 12° | 5° | 103 mm | partly cloudy | 75% | 4.7 m/s | 0.7 moderate | 10.9h |
| March | Acceptable | 7° - 14° | 11° | 160 mm | partly cloudy | 72% | 4.8 m/s | 1.0 moderate | 11.9h |
| April | Good | 12° - 19° | 15° | 226 mm | partly cloudy | 73% | 4.5 m/s | 1.3 high | 12.9h |
| May | Acceptable | 15° - 22° | 19° | 244 mm | overcast | 77% | 4.1 m/s | 1.6 very high | 13.8h |
| June | Good | 19° - 24° | 22° | 352 mm | overcast | 84% | 3.9 m/s | 1.6 very high | 14.2h |
| July | Very Good | 23° - 28° | 25° | 259 mm | partly cloudy | 87% | 4.5 m/s | 1.9 very high | 14.0h |
| August | Very Good | 24° - 29° | 26° | 241 mm | partly cloudy | 83% | 5.2 m/s | 1.9 very high | 13.2h |
| September | Very Good | 21° - 27° | 24° | 318 mm | partly cloudy | 79% | 4.4 m/s | 1.4 high | 12.3h |
| October | Good | 16° - 22° | 19° | 213 mm | partly cloudy | 75% | 4.1 m/s | 1.0 moderate | 11.2h |
| November | Good | 12° - 18° | 15° | 164 mm | partly cloudy | 73% | 3.4 m/s | 0.6 moderate | 10.3h |
| December | Acceptable | 7° - 14° | 10° | 76 mm | partly cloudy | 75% | 3.5 m/s | 0.4 low | 9.8h |
Getting There & Around
How to Get to Kii Ōshima#
Accessible by local ferries from nearby ports on Wakayama Prefecture’s coast. Road access links to the Kii Peninsula network-consult local ferry timetables and regional transport services.
Tips for Visiting Kii Ōshima#
- Plan for a full day if hiking the coastal trails-ferries and local transport on the Kii Peninsula can be infrequent.
- Check local ferry timetables if approaching by sea; some smaller landings are seasonal.
- Try the region's seafood specialities at small coastal restaurants-look for places where fishermen eat.