Weather in Amakusa

Find out what the weather is like in Amakusa right now. Below are up-to-date forecasts and charts to help you plan the perfect trip.

The climate in Amakusa can be described as a mild and humid maritime climate, with distinct subtropical features. Thanks to its island location, there are no severe frosts here, and sharp temperature fluctuations are smoothed by the influence of the sea. This makes the region attractive to visit almost all year round, although each season has its own unique character and atmosphere.

Summer here is hot and humid: in August, the air warms up to an average of 28-30°C. Travellers should be prepared for high humidity and the rainy season, which is most pronounced in June and July — the maximum number of rainy days is recorded during these months (up to 18-19 days per month). Winter, on the other hand, is notable for its mildness: even in January and February, the temperature rarely drops below 6-7°C, allowing for comfortable sightseeing without heavy winter clothing.

Spring and autumn are considered the most favourable times for long walks. In May and October, a very comfortable temperature of around 20°C sets in. The second half of autumn is particularly pleasant: in October and November, rainfall decreases noticeably, and the weather becomes more stable and sunny, creating ideal conditions for exploring the archipelago's nature.

The climate in Amakusa, Japan, is distinguished by its mildness, making it comfortable to visit at any time of year. The annual temperature range fluctuates from cool winter days to warm summers. The coldest months are January and December, when the average daily temperature holds at 8.5–9.8°C, and minimum values rarely fall below 6°C. The warmest time of the year falls in July and August, with average temperatures around 26.6–28.0°C.

Summer in Amakusa is quite warm and comfortable. In July and August, maximum daytime temperatures can reach 28–30°C, while night-time temperatures remain pleasant, not dropping below 24–25°C. This creates a sensation of stable warmth without sharp fluctuations throughout the day. Winters here are mild and humid, without strong frosts. Average daytime highs in the winter months are 10–11°C, and minimum night-time temperatures are rarely below 6–7°C, allowing for comfortable exploration of the region even during the cold season.

Spring and autumn in Amakusa offer very pleasant temperatures for travel. In March, the air warms up to an average of 12.8°C, reaching 19.6°C by May. In autumn, in September and October, comfortable warmth is maintained with average temperatures of 25.5°C and 20.5°C respectively, gradually transitioning to a cooler November (15.5°C). Thus, the temperature regime in Amakusa is generally favourable, with moderate fluctuations between day and night values, contributing to a pleasant holiday.

The climate in Amakusa is characterized by noticeable fluctuations in rainfall throughout the year, with a clearly defined wet season in early summer. The rainiest period falls in June and July, which coincides with "Tsuyu", Japan's traditional rainy season. During these months, the probability of precipitation is highest: about 18 rainy days are recorded in June, and in July this figure reaches its maximum — an average of 19 days with precipitation. Travellers planning a visit at this time should definitely take a reliable umbrella and a raincoat.

By autumn, the weather stabilizes, and a drier, more comfortable period begins. October and November are some of the most favourable months for tourism, as the frequency of rain drops to a minimum — about 9 days per month. In winter, especially in December and January, the volume of precipitation remains small, although cloudy days do occur. Since air temperatures in the winter months rarely drop to freezing, precipitation here falls mainly as rain, and snow is an extremely rare phenomenon.

When packing for a trip to the Amakusa archipelago, it is worth considering the island nature of the climate: it is often windy here, and the weather can change quickly. In winter, the temperature rarely drops below 6-7°C, so you are unlikely to need heavy down jackets, but a quality demi-season coat, scarf, and sweater will be very useful for protection against the cool sea breeze. Spring and autumn delight with comfortable warmth (from 15°C to 20°C), however, for evening walks, it is better to take a light jacket or cardigan, following the principle of layering.

Summer in this region of Japan is hot and humid, with temperatures reaching 30°C. At this time of year, opt for clothes made from natural breathable fabrics such as cotton or linen. June and July are the rainiest months (up to 19 days with precipitation), so be sure to pack a compact umbrella and a light raincoat. Don't forget sun protection: a hat, sunglasses, and high SPF cream are necessary, especially during boat trips to see the dolphins.

Regardless of the season, to explore the sights of Amakusa you will need comfortable shoes with flat soles, suitable for long walks on hilly terrain. If you are travelling in September, be prepared for summer heat to persist, but by November the air becomes fresh and cool. A universal tip for any tourist here is to have a windproof jacket and a comfortable backpack for water and small items.