Amakusa weather by month & the best time to visit
Japan · beach resort · humid subtropical climate
The best time to visit Amakusa is October — its sunniest month (Sunshine Score 68/100), with May and June close behind. Amakusa averages about 1,845 hours of sunshine a year. Daytime highs around 23°C / 73°F and roughly 117 mm of rain in October.
When is the best time to visit Amakusa?
For sunshine, the best time to visit Amakusa is October, then May and June. The dullest month is January (19/100, 73 mm of rain). The full month-by-month picture is in the table below.
How sunny is Amakusa?
Amakusa gets a moderate 1,845 hours of sunshine a year. 49 Sunshine Score points separate October (68) from January (19), so the month you pick matters. It ranks #23 of 79 destinations in Japan for annual sunshine, above the national median of 1,773 hours. Rain has a clear season: the wettest stretch, around July, carries about 44% of the annual 2,156 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 19 | 11° / 52°F | 7° / 45°F | 73 mm | 2 | 15° / 59°F |
| February | 23 | 12° / 54°F | 7° / 45°F | 105 mm | 3 | 15° / 59°F |
| March | 32 | 14° / 57°F | 9° / 48°F | 135 mm | 5 | 15° / 59°F |
| April | 52 | 18° / 64°F | 13° / 55°F | 165 mm | 6 | 18° / 64°F |
| May | 62 | 22° / 72°F | 16° / 61°F | 200 mm | 6 | 20° / 68°F |
| June | 62 | 25° / 77°F | 20° / 68°F | 384 mm | 6 | 24° / 75°F |
| July | 62 | 28° / 82°F | 24° / 75°F | 346 mm | 7 | 28° / 82°F |
| August | 62 | 29° / 84°F | 25° / 77°F | 212 mm | 8 | 31° / 88°F |
| September | 62 | 27° / 81°F | 23° / 73°F | 211 mm | 6 | 29° / 84°F |
| October | 68 | 23° / 73°F | 18° / 64°F | 117 mm | 5 | 26° / 79°F |
| November | 58 | 18° / 64°F | 14° / 57°F | 111 mm | 3 | 22° / 72°F |
| December | 30 | 13° / 55°F | 9° / 48°F | 97 mm | 2 | 17° / 63°F |
Sea temperature in Amakusa by month
The sea off Amakusa is warmest in August at around 31°C / 88°F, and coolest in January at 15°C / 59°F. The water sits at a comfortable 21°C or warmer roughly 6 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Amakusa: questions and answers
What kind of destination is Amakusa?
Amakusa is a beach resort in Japan with a humid subtropical climate — the sea reaches 31°C at its warmest and is swimmable (21°C+) about 6 months a year.
How many hours of sunshine does Amakusa get a year?
Amakusa gets about 1,845 hours of sunshine a year, at its best around October.
When is the best time to visit Amakusa?
The sunniest time to visit Amakusa is October, when the Sunshine Score peaks at 68/100 (with May and June close behind). Expect daytime highs around 23°C / 73°F.
What is the least sunny month in Amakusa?
January is the least sunny month in Amakusa, scoring 19/100 with about 73 mm of rain.
What is the sea temperature in Amakusa?
The sea in Amakusa ranges from about 15°C (January) to 31°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Amakusa?
The typical midday UV index in Amakusa peaks around 8 (very high) in August, easing to about 2 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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