Iki Island

Island Rural Nagasaki island with archaeological and beach sites

In Nagasaki Prefecture, Iki Island mixes sandy coves, fishing villages and archaeological sites from the Yayoi period; visitors travel for beaches, fresh seafood and coastal walks.

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Aoshima, an uninhabited island where Iki Island's thermal power plant is located.jpg
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Iki Island Aerial photograph.May 2017.jpg
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View of Iki Island from the Waterfoil-479.jpg

Iki Island (Iki-shima) is an island in Nagasaki Prefecture in southwestern Japan, located in the waters between Kyushu and Tsushima in the Genkai Sea. It is administered as Iki City and combines coastal settlements with rural interior landscapes.

The island’s attractions are coastal scenery, beaches, and local fishing harbours; it is also known for archaeological sites and traditional festivals. Travel to the island is by ferry or short domestic flight from mainland Kyushu, and visitors use local roads to reach beaches and small villages.

Iki has a long human presence with archaeological remains from ancient periods to the present; the island developed as a maritime and local administrative centre under successive regional authorities. In modern times it functions as a small regional hub for fishing, tourism and local services.

Geographically the island lies off the northwest coast of Kyushu in Nagasaki Prefecture; the main settlement and ferry/air links form the island’s transport nodes to the larger cities of Kyushu.

Iki Island
Iki Island, Nagasaki Prefecture, Japan
33.7883, 129.7242

Tips for Visiting Iki Island #

  • Book your ferry (and any vehicle space) well before high season or Golden Week - regular ferry connections from Kyushu (Fukuoka/Hakata) can fill and schedules are limited outside peak times.
  • Use Iki's main port (Iki City/Livadi area) as your base for exploring; services and public-transport frequencies are limited, so plan day routes around published bus timetables or arrange a rental vehicle in advance.
  • Go beyond the main beaches: the island has kofun (burial mounds), small shrines and coastal walks that many day-trippers miss - allow at least one full day to explore the interior and less-frequented coves.

Best Time to Visit Iki Island #

For Iki Island, aim for late spring or early autumn for mild weather and fewer crowds, while avoiding the main rainy and typhoon season.

Late spring (ideal)
May · 15 to 22°C
Pleasant temperatures, before the main rainy season and tourist peak-good for beaches and outdoor exploration.
Summer
Jun-Aug · 22 to 30°C
Warm to hot and humid; June-July often sees the rainy season and August can bring typhoon risk-expect heavier rain and higher humidity.
Autumn
Sep-Oct · 18 to 24°C
Generally pleasant temperatures and fewer tourists, but early autumn can still carry typhoon risk in some years.

Weather & Climate near Iki Island #

Climate

Iki Island'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 3°C to 29°C. Abundant rainfall (1638 mm/year), wettest in June.

Best Time to Visit
AugustOctoberJuly
Temperature & Rainfall
Temperature Range
32°
Warmest Month
-2°
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 9°C and lows of 3°C. Moderate rainfall (62 mm) and mostly overcast skies.

52 Acceptable

Comfort

Feels Like Cold
C
Temperature
73%
Humidity
Very Humid

Weather

62 mm
Rainfall
3.7 m/s
Wind
Light Breeze
0.4
UV Index
Low
10.1h daylight

February

February is cold with highs of 10°C and lows of 4°C. Moderate rainfall (70 mm) and mostly overcast skies.

54 Acceptable

Comfort

Feels Like Cold
C
Temperature
10°
71%
Humidity
Very Humid

Weather

70 mm
Rainfall
3.6 m/s
Wind
Light Breeze
0.6
UV Index
Moderate
10.9h daylight

March

March is cold with highs of 12°C and lows of 7°C. Regular rainfall (95 mm) and mostly overcast skies.

54 Acceptable

Comfort

10°
Feels Like Cold
10°C
Temperature
12°
71%
Humidity
Very Humid

Weather

95 mm
Rainfall
3.6 m/s
Wind
Light Breeze
0.9
UV Index
Moderate
11.9h daylight

April

April is cool with highs of 17°C and lows of 11°C. Significant rainfall (142 mm) and mostly overcast skies.

58 Acceptable

Comfort

14°
Feels Like Cool
14°C
Temperature
11° 17°
76%
Humidity
Very Humid

Weather

142 mm
Rainfall
3.5 m/s
Wind
Light Breeze
1.3
UV Index
High
12.9h daylight

May

May is mild with highs of 21°C and lows of 15°C. Significant rainfall (138 mm) and mostly overcast skies.

60 Good

Comfort

18°
Feels Like Mild
18°C
Temperature
15° 21°
82%
Humidity
Very Humid

Weather

138 mm
Rainfall
3.1 m/s
Wind
Light Breeze
1.5
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 (280 mm) and mostly overcast skies.

64 Good

Comfort

22°
Feels Like Mild
22°C
Temperature
19° 24°
88%
Humidity
Very Humid

Weather

280 mm
Rainfall
3.2 m/s
Wind
Light Breeze
1.5
UV Index
High
14.2h daylight

July

July is warm with muggy conditions (dew point 23°C). Heavy rain (233 mm) and mostly overcast skies.

66 Good

Comfort

26°
Feels Like Warm
26°C
Temperature
24° 28°
89%
Humidity
Very Humid

Weather

233 mm
Rainfall
3.2 m/s
Wind
Light Breeze
1.8
UV Index
Very High
14.0h daylight

August

August is the warmest month with stifling humidity (dew point 24°C). Significant rainfall (150 mm) and partly cloudy skies.

72 Very Good

Comfort

27°
Feels Like Warm
27°C
Temperature
25° 29°
84%
Humidity
Very Humid

Weather

150 mm
Rainfall
3.1 m/s
Wind
Light Breeze
1.8
UV Index
Very High
13.2h daylight

September

September is mild with highs of 26°C and lows of 21°C. Heavy rain (228 mm) and mostly overcast skies.

66 Good

Comfort

23°
Feels Like Mild
23°C
Temperature
21° 26°
79%
Humidity
Very Humid

Weather

228 mm
Rainfall
3.0 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. Regular rainfall (93 mm) and partly cloudy skies.

68 Good

Comfort

19°
Feels Like Mild
19°C
Temperature
16° 22°
72%
Humidity
Very Humid

Weather

93 mm
Rainfall
3.3 m/s
Wind
Light Breeze
1.0
UV Index
Moderate
11.2h daylight

November

November is cool with highs of 16°C and lows of 10°C. Regular rainfall (82 mm) and mostly overcast skies.

62 Good

Comfort

13°
Feels Like Cool
13°C
Temperature
10° 17°
70%
Humidity
Very Humid

Weather

82 mm
Rainfall
3.0 m/s
Wind
Light Breeze
0.5
UV Index
Moderate
10.3h daylight

December

December is cold with highs of 12°C and lows of 5°C. Moderate rainfall (65 mm) and mostly overcast skies.

52 Acceptable

Comfort

Feels Like Cold
C
Temperature
12°
73%
Humidity
Very Humid

Weather

65 mm
Rainfall
3.0 m/s
Wind
Light Breeze
0.3
UV Index
Low
9.8h daylight

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