Climate & Weather Guide · Cook IslandsClimate & Weather Guide in Cook Islands
Climate zones, seasonal temperatures, rainfall patterns, and best travel times
The Cook Islands, a small Pacific archipelago, feature a tropical climate ideal for residents and expats seeking year-round warmth. Temperatures remain consistently warm, varying from 21°C to 29°C, with minimal seasonal differences due to its equatorial location. The wet season (November-April) brings high humidity and frequent rain, while the dry season (May-October) offers more sunshine and comfort. Classified primarily as Aw (tropical savanna) under Köppen, it experiences trade winds moderating heat. Annual rainfall averages 1500-2000mm, concentrated in summer months, with high humidity year-round. Sunshine exceeds 2500 hours annually, appealing for outdoor lifestyles, though cyclones pose occasional risks.
Summer Average
25-29°C
Winter Average
21-26°C
Climate Types
Tropical savanna
1500-2000 mm
2,500-2,800 hours annually
75-85%
Regional Climate Variations
Southern Cook Islands (Rarotonga)
Rarotonga, the main island hub, exemplifies the tropical climate with warm days averaging 27-29°C in wet season and 24-26°C in dry. High humidity persists, peaking at 85% during rainy months with 250-300mm precipitation. Trade winds provide relief, while sea temperatures stay above 26°C year-round, perfect for swimming. Expats enjoy consistent warmth but prepare for sudden showers and cyclone season (January-March). Sunshine is abundant in winter, supporting beach and outdoor activities.
Warm, humid paradise with refreshing trade winds and vibrant ocean breezes, ideal for water lovers yet occasionally steamy.
Northern Cook Islands (Pukapuka)
Northern atolls like Pukapuka mirror southern tropics but trend slightly drier, especially in forecasts for low rainfall periods. Temperatures hold steady at 24-28°C, with less intense rains (150-250mm monthly in wet season). Higher exposure to easterly trades enhances comfort, reducing perceived humidity. Sea levels and tides influence microclimates, but warmth persists. Residents appreciate calmer winters for fishing and island life, with fewer cloudy days overall.
Consistently balmy with drier spells and stronger winds, offering a breezier, less muggy tropical escape.
The Cook Islands offer a uniform tropical climate with steady warmth and high humidity, varying mainly by rainfall between southern and northern islands. Expats enjoy endless summer-like conditions perfect for beach living, though wet season rains and cyclone risks require adaptation. Its stable, ocean-moderated weather appeals to those craving paradise without extreme seasons.
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