Kii Ōshima

Island Island off Kii Peninsula, part of Wakayama Prefecture

Island off Wakayama’s Kii Peninsula with coastal cliffs, fishing harbours and seaside roads. Visitors cycle, hike short coastal routes and sample local seafood.

Main image
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Cenotaph of Turkey ship, Ottoman frigate Ertuğrul.jpg
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Flowers Blossom beside Walkway in Kii Oshima 20100214.jpg
Gongen Island-01.jpg
Kii Oshima Island Aerial photograph.1975.jpg
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Kushimoto Oshima Post office-01.jpg
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Kii Ōshima
33.4669, 135.8290

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.

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.

Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
34°
Warmest Month
-1°
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 11°C and lows of 4°C. Regular rainfall (88 mm) and partly cloudy skies.

56 Acceptable

Comfort

Feels Like Cold
C
Temperature
11°
76%
Humidity
Very Humid

Weather

88 mm
Rainfall
4.5 m/s
Wind
Light Breeze
0.5
UV Index
Low
10.1h daylight

February

February is the coolest month with highs of 12°C and lows of 4°C. Significant rainfall (103 mm) and partly cloudy skies.

54 Acceptable

Comfort

Feels Like Cold
C
Temperature
12°
75%
Humidity
Very Humid

Weather

103 mm
Rainfall
4.7 m/s
Wind
Light Breeze
0.7
UV Index
Moderate
10.9h daylight

March

March is cool with highs of 14°C and lows of 7°C. Significant rainfall (160 mm) and partly cloudy skies.

52 Acceptable

Comfort

11°
Feels Like Cool
11°C
Temperature
14°
72%
Humidity
Very Humid

Weather

160 mm
Rainfall
4.8 m/s
Wind
Light Breeze
1.0
UV Index
Moderate
11.9h daylight

April

April is cool with highs of 18°C and lows of 12°C. Heavy rain (226 mm) and partly cloudy skies.

60 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
12° 19°
73%
Humidity
Very Humid

Weather

226 mm
Rainfall
4.5 m/s
Wind
Light Breeze
1.3
UV Index
High
12.9h daylight

May

May is mild with highs of 22°C and lows of 15°C. Heavy rain (244 mm) and mostly overcast skies.

56 Acceptable

Comfort

19°
Feels Like Mild
19°C
Temperature
15° 22°
77%
Humidity
Very Humid

Weather

244 mm
Rainfall
4.1 m/s
Wind
Light Breeze
1.6
UV Index
Very High
13.8h daylight

June

June is mild with highs of 24°C and lows of 19°C. The wettest month with heavy rain (352 mm) and mostly overcast skies.

64 Good

Comfort

22°
Feels Like Mild
22°C
Temperature
19° 24°
84%
Humidity
Very Humid

Weather

352 mm
Rainfall
3.9 m/s
Wind
Light Breeze
1.6
UV Index
Very High
14.2h daylight

July

July is warm with muggy conditions (dew point 24°C). Heavy rain (259 mm) and partly cloudy skies.

70 Very Good

Comfort

25°
Feels Like Warm
25°C
Temperature
23° 28°
87%
Humidity
Very Humid

Weather

259 mm
Rainfall
4.5 m/s
Wind
Light Breeze
1.9
UV Index
Very High
14.0h daylight

August

August is the warmest month with stifling humidity (dew point 24°C). Heavy rain (241 mm) and partly cloudy skies.

74 Very Good

Comfort

26°
Feels Like Warm
26°C
Temperature
24° 29°
83%
Humidity
Very Humid

Weather

241 mm
Rainfall
5.2 m/s
Wind
Light Breeze
1.9
UV Index
Very High
13.2h daylight

September

September is mild with highs of 26°C and lows of 21°C. Heavy rain (318 mm) and partly cloudy skies.

70 Very Good

Comfort

24°
Feels Like Mild
24°C
Temperature
21° 27°
79%
Humidity
Very Humid

Weather

318 mm
Rainfall
4.4 m/s
Wind
Light Breeze
1.4
UV Index
High
12.3h daylight

October

October is mild with highs of 22°C and lows of 16°C. Heavy rain (213 mm) and partly cloudy skies.

68 Good

Comfort

19°
Feels Like Mild
19°C
Temperature
16° 22°
75%
Humidity
Very Humid

Weather

213 mm
Rainfall
4.1 m/s
Wind
Light Breeze
1.0
UV Index
Moderate
11.2h daylight

November

November is cool with highs of 18°C and lows of 12°C. Significant rainfall (164 mm) and partly cloudy skies.

64 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
12° 18°
73%
Humidity
Very Humid

Weather

164 mm
Rainfall
3.4 m/s
Wind
Light Breeze
0.6
UV Index
Moderate
10.3h daylight

December

December is cool with highs of 14°C and lows of 7°C. Moderate rainfall (76 mm) and partly cloudy skies.

58 Acceptable

Comfort

10°
Feels Like Cool
10°C
Temperature
14°
75%
Humidity
Very Humid

Weather

76 mm
Rainfall
3.5 m/s
Wind
Light Breeze
0.4
UV Index
Low
9.8h daylight

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