The climate of the Pitcairn Islands, a British territory in the Pacific Ocean, just south of the Tropic of Capricorn (therefore in the Southern Hemisphere), is subtropical oceanic, characterized by a hot summer from December to March, when the maximum temperatures are around 27/28 °C (81/82 °F), and a very mild winter, with maximum temperatures around 22/23 °C (72/73 °F) from June to September.
Adamstown, the capital, is located on the only inhabited island, the southernmost of the four islands of the archipelago, where the descendants of the Bounty mutineers reside.
Here are the average temperatures of Adamstown.
Adamstown - Average temperatures
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Min (°C)222322212019181818181921
Max (°C)282828262523222223242627
Min (°F)727372706866646464646670
Max (°F)828282797773727273757981

The rains are frequent in all seasons, so much so that in a typical year, 1,600 millimeters (63 inches) of rain fall, and in all the months precipitation exceeds on average 100 mm (4 in). Here is the average precipitation.
Adamstown - Average precipitation
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Prec.(mm)1201401201551301551501251401351201651635
Prec.(in)4.75.54.76.15.16.15.94.95.55.34.76.564.4
Days141313121111111212131414150

The wind often blows, moderate or strong, especially in winter, when weather fronts brought by the westerlies often pass over the ocean at this latitude, so there are periods of bad weather.
The amount of sunshine is high in the summer months, and it's still acceptable in the winter months, when there are also sunny days.

Adamstown

The sea temperature is high enough in summer, while from July to October it becomes a little cool for swimming.
Adamstown - Sea temperature
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Temp (°C)262626252423222121222324
Temp (°F)797979777573727070727375

Tropical cyclones



Sometimes, from November to April, the Pitcairn Islands can be affected by tropical cyclones, but it rarely happens; moreover, they are usually not intense because the waters in which they are located are not warm enough, and therefore do not provide a lot of energy. However, in the most intense years of El Niño, such as 1982/83 and 1997/98, when the sea gets warmer, cyclones become more frequent.

Best Time



The best time to visit the Pitcairn Islands, either for excursions or for a beach holiday, runs from January to March, in fact it is the warmest and sunniest of the year. Sometimes, however, in this period a tropical cyclone may pass over the islands, or rather its remains. You can therefore go in the other months, particularly in September and October, when, however, the weather is a bit cool for swimming.

What to pack



In winter (June to August): bring spring/autumn clothes (light for the day), a sweatshirt or sweater, a jacket, a raincoat or umbrella.
In summer (December to February): bring light clothes for the day, a scarf for the breeze, a sweatshirt for the evening, a light raincoat or umbrella.