Cook Islands Weather and Climate – when to travel

Posted on September 13, 2017

The Cook Islands are located right in the heart of the South Pacific Ocean and as such, we enjoy a tropical climate all year round making them an ideal place for holiday makers. The summer months of November to April enjoy a hot climate where temperatures reach 26-30°C whilst the cooler months of May to October will reach temperatures of between 22-27°C.

Weather in Rarotonga and Aitutaki

Whilst there are slight variances in the temperatures and rainfall between each of the Cook Islands, the averages tend to be about the same. Rarotonga and Aitutaki are the two most popular islands to visit and both enjoy warm temperatures all year round. Both of the islands are great places to visit at any time of the year and although we do experience ‘winter’, you will see below that the temperature and rainfall doesn’t change too much throughout the year.

Averages Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rainfall (mm) 250 245 231 187 169 128 120 127 125 142 197 246
Temp (°C) 27 27 27 27 26 25 25 25 25 26 26 26
Min temp (°C) 25 25 25 25 24 23 23 23 23 24 24 24
Max temp (°C) 29 29 29 29 29 28 27 27 27 28 28 29

What is the rainfall like in the Cook Islands?

Like many tropical islands, the Cook Islands also have their fair share of rain throughout the year with highest rainfall coming in the summer months of November to March. The good news for those travelling to the Cook Islands at that time of year is that the rains tend to be tropical in nature so not only are they warm, they also come and go pretty quickly and generally speaking, the rainfall in the summer is not that dissimilar to the drier winter months.

Sea temperature in the Cook Islands

If you love to swim in the sea but you’re not a huge fan of the cold water, the Cook Islands are another perfect destination for you. Not only do we enjoy crystal clear waters, especially in the Muri Lagoon right outside of Pacific Resort Rarotonga as well as on Aitutaki, we also have warm waters year round where the temperature fluctuates from a low of around 25°C to a high of around 28-29°C. This makes the Cook Islands one of the best places for sea-based activities including snorkelling, diving, kite surfing and kayaking.

When to visit

The Cook Islands are definitely a year round destination for holidaymakers although we definitely have a high and a low season. For those who like things not too warm, the winter months of June, July and August are perhaps the best time to visit when it is often cold in countries like New Zealand and Australia but here in the Cook Islands, we enjoy day time highs of 26°C and night time lows of 20°C. For those who like it really hot and don’t mind the odd tropical shower January to March are our hottest months with the day time temperature topping out at around 30°C and the overnight low going to 23°C.

Whenever you choose to visit, you are in for an absolute treat when you stay at any one of our resorts whether its’ on Rarotonga or Aitutaki.

Cook Islands Weather for the next three days