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Climate - Kermadec (New Zealand)


Average weather, temperature, rainfall, sunshine hours

Flag - New Zealand

Kermadec (New Zealand), position the map


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Climate chart - Raoul Island

The climate of the Kermadec Islands is humid subtropical, with very mild winters (June to August) and warm, rainy summers (December to March). Being in the southern hemisphere, the seasons are reversed compared to the northern hemisphere.
The Kermadec archipelago (Rangitāhua in Maori) is made up of small islands located in the Pacific Ocean, between 29 and 31 degrees south latitude. The main islands are Raoul (also called Sunday Island), Macauley and Curtis. The islands are not flat, but are covered by hills, the highest of which is located on Raoul Island, and reaches 516 meters (1,693 feet).
Raoul Island, a volcanic island located more than 950 kilometers (600 miles) north-east of the North Island of New Zealand and at 29 degrees south latitude, is mild and rainy. The average temperature ranges from 16 °C (61 °F) in August to 23 °C (73.5 °F) in February. In winter, from June to September, there can be cool periods, with lows of 9/10 °C (48/50 °F) and highs of 16/17 °C (61/63 °F). In summer, the heat records are 29/30 °C (84/86 °F) between December and March.
Here are the average temperatures.
Raoul Island - Average temperatures (1981-2010)
MonthMin (°C)Max (°C)Mean (°C)Min (°F)Max (°F)Mean (°F)
January19.725.122.4677772.3
February20.425.623697873.4
March19.824.822.3687772.1
April18.123.420.8657469.4
May16.421.519627166.1
June14.82017.4596863.3
July13.71916.4576661.4
August13.218.816566660.8
September13.919.516.7576762.1
October14.920.417.6596963.8
November16.521.919.2627166.6
December18.423.621657469.8
Year16.621.919.2561.971.566.5

On average, 1,385 mm (54.5 in) of rain fall per year. The rains are well distributed throughout the year, although they are more frequent in winter and less frequent between spring and early summer, from October to January. Here is the average rainfall.
Raoul Island - Average precipitation
MonthMillimetersInchesDays
January1054.18
February1505.910
March1405.511
April1003.912
May1154.512
June1455.713
July1305.114
August1204.712
September1003.911
October652.69
November1054.18
December1104.38
Year138554.5130

Despite the frequent rains, the amount of sunshine is quite good, in fact there are almost 2,400 hours of sunshine a year. Here are the average sunshine hours per day.
Raoul Island - Sunshine hours
MonthAverageTotal
January9275
February8.5245
March6.5200
April5.5170
May5150
June4.5130
July4.5145
August5.5170
September6.5200
October7.5230
November7.5220
December8.5260
Year6.52390

The temperature of the sea is quite warm from January to April, while it becomes very cool from July to October.
Raoul Island - Sea temperature
MonthCelsius (°C)Fahrenheit (°F)
January23.574
February2475
March23.574
April2373
May21.571
June20.569
July19.567
August1966
September1966
October19.567
November2169
December2272
Year21.370.4

The Kermadec Islands are not exactly in the path of tropical cyclones, but sometimes one of them can leave the tropical belt and head south, passing over the islands before weakening in the colder seas of the south. This happens from November to April, but more often from January to March.

Raoul Island

Best Time


To visit the Kermadec Islands you can choose the summer, from December to March, as it is the warmest and sunniest period of the year. It must be said that the rains are quite frequent, moreover, a tropical cyclone (or its remnants) can sometimes pass. The least rainy period is from October to January. December is probably the best month.

From late August to early November, humpback whales cross the sea surrounding the islands, especially Raoul.

It should be remembered that in order to preserve pristine nature and biodiversity, only a small number of visitors are allowed access, and to visit them you need to obtain a permit. The islands are reached by boat with a 4/5 day trip.


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