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Shiwaku Islands

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Shiwaku Islands Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Shiwaku Islands year round climate

  • Spring (March–May): Average 10.6–18.9°C, mild climate with increasing rainfall. Temperatures rise in March, April feels warm and comfortable, and May is relatively humid. Common activities: spring outings, flower viewing, seaside walks. Recommended clothing: light jacket, long-sleeved shirt, bring a raincoat.
  • Summer (June–August): Average 23.1–29.6°C, hot and humid with heavier rainfall, June being the rainiest month. Common activities: swimming, water activities, seaside relaxation. Recommended clothing: light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 19.8–27.0°C, gradually decreasing temperatures and rainfall, pleasant and comfortable. September remains hot, October is comfortable, and November turns cooler. Common activities: autumn leaves viewing (if any), seaside walks, outdoor activities. Recommended clothing: long-sleeved shirts, light jackets; there is a larger temperature difference between morning and evening, so prepare warm clothing.
  • Winter (December–February): Average 6.4–8.6°C, cold and dry with the least rainfall. Common activities: indoor activities, onsen experience. Recommended clothing: warm coat, sweater, scarf, hat.

Shiwaku Islands climatological average

Annual average temperature: approx. 17°C / Annual rainfall: approx. 1141 mm / Summer humidity: 70%–80% / Rainiest month: June

Shiwaku Islands monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
6.4°C
28
February
6.5°C
54.6
March
10.6°C
93.9
April
15.6°C
110.7
May
18.9°C
145.9
June
23.1°C
205.5
July
28°C
134.7
August
29.6°C
116.2
September
27°C
101.8
October
19.8°C
59.6
November
14.6°C
72.8
December
8.6°C
17.7

Shiwaku Islands weather for the next seven days

11/21
Friday
Patchy rain nearby
16.4°C/12.3°C
11/22
Saturday
Sunny
14.4°C/10.5°C
11/23
Sunday
Partly Cloudy
15.3°C/10.4°C
11/24
Monday
Sunny
16.1°C/10.9°C
11/25
Tuesday
Patchy rain nearby
16.2°C/11.2°C
11/26
Wednesday
Sunny
12.9°C/11°C
11/27
Thursday
Sunny
15.2°C/9°C

Shiwaku Islands Frequently Asked Questions and Useful Information for Travel

What are the Shiwaku Islands?

The Shiwaku Islands are a picturesque archipelago located in the Seto Inland Sea, renowned for their tranquil beauty, traditional fishing villages, and unique island culture. This chain of islands offers a serene escape from the mainland bustle.

What is there to do on the Shiwaku Islands?

Visitors to the Shiwaku Islands can enjoy exploring charming coastal paths, cycling between islands via bridges, sampling fresh local seafood, and experiencing the relaxed pace of island life. Many come to enjoy the scenic views and the peaceful atmosphere.

When is the best time to visit the Shiwaku Islands?

The best time to visit the Shiwaku Islands is typically during the spring (March to May) and autumn (September to November) when the weather is mild and pleasant for outdoor activities. Summer can be warm and humid, while winter offers a quieter experience.

How do I get to the Shiwaku Islands?

Access to the Shiwaku Islands is usually via ferry from mainland ports in Kagawa Prefecture, such as Takamatsu. Some islands are also connected by bridges, allowing for easy transit by car or bicycle.

What kind of food is popular in the Shiwaku Islands?

The Shiwaku Islands are celebrated for their fresh seafood, particularly the catches from the Seto Inland Sea. Expect delicious dishes featuring local fish, squid, and oysters. Sanuki Udon, a local noodle specialty, is also a must-try.