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Amakusa

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Amakusa Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Amakusa year round climate

  • Spring (March–May): Average 13.8–20.4°C, mild and comfortable climate, but with relatively high rainfall; it is recommended to carry an umbrella at all times. Common activities: flower viewing, coastal walks. Recommended attire: light jacket, long-sleeved shirt, comfortable walking shoes.
  • Summer (June–August): Average 23.7–28.9°C, hot and humid, with rainfall concentrated in June. Common activities: swimming, water sports. Recommended attire: light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 21.6–17.1°C, pleasant climate with reduced rainfall. Common activities: outdoor hiking, viewing autumn leaves (in some areas). Recommended attire: comfortable long-sleeved clothing, light jacket.
  • Winter (December–February): Average 9.2–10.2°C, lower temperatures with little rainfall. Common activities: onsen (hot spring) bathing, indoor activities. Recommended attire: warm jacket, sweater, scarf.

Amakusa climatological average

Annual average temperature: approx. 18.7°C / Annual rainfall: approx. 2125 mm / Summer humidity: 70%–80% / Rainiest month: June

Amakusa monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
9.2°C
110.9
February
10.2°C
102.1
March
13.8°C
203.6
April
17.7°C
253.8
May
20.4°C
233.4
June
23.7°C
393.9
July
28.2°C
227
August
28.9°C
141.8
September
27.4°C
144.3
October
21.6°C
116.8
November
17.1°C
127.1
December
10.1°C
70.7

Amakusa weather for the next seven days

12/18
Thursday
Sunny
13°C/11.5°C
12/19
Friday
Sunny
15.9°C/11.2°C
12/20
Saturday
Patchy rain nearby
18.6°C/15.7°C
12/21
Sunday
Moderate rain
17°C/14.8°C
12/22
Monday
Patchy rain nearby
13.4°C/12.5°C
12/23
Tuesday
Sunny
13.7°C/11.3°C
12/24
Wednesday
Sunny
13.8°C/10.9°C

Amakusa Frequently Asked Questions and Useful Information for Travel

Is Amakusa worth visiting?

Absolutely. While rich in history, the natural beauty of Amakusa alone makes it a worthwhile destination. Expect lush greenery, pristine blue waters, and remarkable geological formations that have earned Amakusa Geopark designation.

What is the meaning of the name Amakusa?

The name 'Amakusa' (天草) translates to 'Heaven's Grass' or 'Heavenly Grass' in Japanese. This archipelago, situated off the west coast of Kyushu, is renowned for its profound history as a sanctuary for 'hidden Christians' and its breathtaking natural landscapes.

What happened to Amakusa Shirō?

Amakusa Shirō was tragically executed after the castle he defended was overrun. His head was later displayed on a pike in Nagasaki as a stark warning to potential Christian rebels.

Is it safe to swim in Amakusa?

Yes, swimming in Amakusa is generally safe and enjoyable. Many beaches are situated in shallow bays with calm waves, making them ideal for families with young children. Beyond swimming, you can also enjoy activities like BBQ.

What are Amakusa's main attractions?

Amakusa is celebrated for its stunning natural landscapes, including its designation as a national Geopark, and its significant historical ties to Japan's hidden Christians. Visitors can explore beautiful beaches, unique geological sites, and remnants of its rich past.