Let’s face it, there’s never a bad time to visit the Cook Islands with its warm, sunny weather all year round.
While there’s not much seasonal difference between summer, autumn, winter and spring, thanks to the islands being just south of the equator, there are distinct wet and dry seasons.
Depending on where you’re staying – Rarotonga or Aitutaki – there may be slight variations on the weather front, but overall, you can expect a healthy dose of Vitamin Sea while you’re there.
So pack your broad-brimmed hat, sunglasses and 50+ sunscreen and plan how to make the most of the beautiful weather with these great Cook Island deals.
Cook Islands Weather Overview
If you’re looking for the perfect time to visit the Cook Islands, the shoulder months of April/May and September/October provide a balance of warm, dry weather.
The “wet season” runs during the summer months, when humid days can be broken by short bursts of rainfall that are quickly superseded by blue skies again. The drier months are from April to November, when temperatures average 26°C – this is also peak season, when travel costs can be higher.
Summer (December – February)
Summer (December to February) brings slightly higher humidity and occasional rainfall, with average temperatures ranging between 22°C (min) and 30°C (max).
Hot and humid, your days will be spent cooling off in the tropical waters or relaxing with a cocktail under a cool palm tree. When rain does fall, it tends to be in the afternoon giving you the perfect excuse to curl up with a good book undercover or indulge in a cat nap.
The Cook Island’s vivid green landscape flourishes in summer, and fewer crowds means you can enjoy peace and quiet. Better still, you can score some great deals for travel during summer.
December Weather in Cook Islands
With average temperatures ranging from 22 to 29°C, the climate is warm and humid, with frequent but brief rain showers and pleasantly warm sea temperatures.
January Weather in Cook Islands
January in the Cook Islands is the warmest and wettest month, with temperatures averaging between 22 and 30°C. Expect very tropical conditions, lush landscapes and a slight risk of cyclones.
February Weather in Cook Islands
February continues the tropical pattern with average temperatures of 22 to 29°C. Afternoon showers are common, keeping the scenery vibrant and green.
Autumn (March – May)
Ask the experts and they’ll tell you the shoulder season is the best time to travel to the Cook Islands. A combination of low prices, fewer tourists and less rainfall creates the perfect environment for a tropical getaway.
March Weather in Cook Islands
During March temperatures in the Cook Islands average 22 to 29°C, with some lingering tropical showers still present. It's a warm and humid time as the wet season gradually tapers off.
April Weather in Cook Islands
With average temperatures between 21 and 28°C, April brings easing rainfall and the return of beautiful, more settled weather, making it a pleasant time to visit.
May Weather in Cook Islands
May marks the start of the dry season, with cooler temperatures ranging from 20 to 27°C. It’s an excellent month for travel thanks to the drier, more comfortable conditions.
Winter (June – August)
Weather-wise, the dry season is the best time visit the Cook Islands. However, this is also peak season, which means more tourists and higher prices. You won’t need a sweater during a Cook Islands winter – the mild temperatures and clear blue skies are ideal for outdoor activities.
June Weather in Cook Islands
June brings dry weather and cool breezes to the Cook Islands, with average temperatures ranging from 18 to 25°C. It’s a refreshing time to enjoy outdoor activities.
July Weather in Cook Islands
With temperatures between 17 and 25°C, July is part of the peak tourist season. It’s wise to book early to secure accommodation and activities.
August Weather in Cook Islands
August offers ideal weather for water sports and adventure tours, with average temperatures of 18 to 26°C and consistently pleasant conditions.
Spring (September – November)
Shoulder season in the Cook Islands, spring heralds the return of warmer weather and is less crowded than during peak season. You can take advantage of some great deals for spring travel and leave Australia’s cold weather behind in favour of blue skies and warm sunshine.
September Weather in Cook Islands
With average temperatures of 19 to 26°C, September offers a great balance of sunshine and manageable humidity, making it an ideal time to explore the islands.
October Weather in Cook Islands
October brings beach-perfect days with temperatures between 20 and 27°C, though a touch of humidity starts to return.
November Weather in Cook Islands
In November, the wet season begins, but with warm sea temperatures and highs of 21 to 28°C, it's still a fantastic time for snorkelling and diving.
Best time of year to travel to the Cook Islands for…
|
Activity |
Best time to travel |
Why |
|
Snorkelling/diving |
Year round |
Explore an abundance of tropical fish and corals with incredible visibility of up to 60 metres and warm waters. |
|
Surfing |
November to March |
Strong North Pacific storms send swell to the South Pacific, where southeast trade winds create ideal offshore conditions on northern and western shores. |
|
Swimming |
Year round |
The warm waters range from 23°C to 28°C and are inviting all year round. And there are no stingers! |
|
Stand Up Paddleboarding |
Year round |
Beautiful beaches and safe, clear lagoons make stand up paddleboarding the perfect way to enjoy a day on the water. |
|
Hiking |
June to August |
Cooler and drier weather during these months improves trail conditions for those wanting to explore on foot. |
|
Festivals and events |
June to December |
Event season kicks off in June, with Constitution Day celebrations and other major cultural and music festivals. |
|
Tours |
Year round |
Tours on Rarotonga and Aitutaki run throughout the year, however, may be weather affected during the wet season (December – February). |
|
Whale watching |
July to October |
Humpback whales come from Antarctica to the warmer waters of the Cook Islands to mate, give birth and rest, and can often be seen from the Rarotonga foreshore. |
|
Kitesurfing |
May to October |
The 15 to 30 knot easterly trade winds and clear lagoons on Rarotonga and Aitutaki are perfect for kitesurfing. Aitutaki hosts the annual Manureva Aquafest Kitesurfing Competition in August. |
Final tips for planning your Cook Islands Holiday
Weather isn’t the only consideration when planning a trip to the Cook Islands. With so much to see and do, Spacifica Travel can help you plan the perfect trip around festivals, events, school holidays or personal travel needs. With flights available all year round, the Spacifica team can organise a complete package including flights, accommodation, transfers, car hire and more.
Why book with Spacifica Travel
The Spacifica Travel experts know everything there is to know about travelling to the Cook Islands. Whether you’re wanting to visit Rarotonga, Aitutaki – or both – they can tailor packages to suit your needs and budget. Every aspect of your holiday – flights, accommodation and experiences – can be bundled for a stress-free trip and the team has plenty of tips to help you make the most of whatever season you choose.