Climate & Weather Guide
Climate zones, seasonal temperatures, rainfall patterns, and best travel times in Cayman Islands
The Cayman Islands feature a tropical marine climate with minimal seasonal temperature variation, characterized by warm temperatures year-round, high humidity, and a distinct wet season from May to October and dry season from November to April. As a small archipelago of just over 260 square kilometers, the climate is highly uniform across Grand Cayman, Cayman Brac, and Little Cayman. Average highs reach 31-32°C in summer with lows around 25-26°C, while winter sees highs of 28-29°C and lows of 23-24°C. Annual rainfall totals approximately 1400-1600 mm, concentrated in the wet season with peaks in September-October. Expect abundant sunshine, around 9 hours daily in summer, and oppressive humidity levels of 75-85%. The Köppen classification is Aw (tropical savanna), ideal for beach lovers but with hurricane risks from June to November.
Summer Average
25-32°C
Winter Average
23-29°C
Climate Types
Tropical savanna
1400-1600 mm
2,800-3,200 hours annually
75-85%
Regional Climate Variations
Grand Cayman
Grand Cayman, the largest and most populated island, experiences the classic tropical marine climate with warm, sunny mornings turning hot and humid by afternoon, often with brief thundershowers in the wet season. Summer highs average 31.7°C with lows of 25.6°C, while winter offers milder 29.2°C highs and 23.6°C lows. Rainfall peaks at around 250 mm in September-October, but dry months like March see under 50 mm. High humidity persists year-round, making it feel oppressive, especially during hurricane season. Residents enjoy consistent beach weather but must prepare for tropical storms and occasional cold fronts bringing rare dips to 19°C.
Warm, breezy paradise with sticky humidity and vibrant wet-season showers, perfect for water activities year-round but demanding AC and storm readiness.
Cayman Brac and Little Cayman
The sister islands of Cayman Brac and Little Cayman share the same uniform tropical climate as Grand Cayman, with slightly breezier conditions due to elevation on Brac's bluffs. Temperatures mirror the main island: 31-32°C summer highs and 28-29°C winter highs, with lows rarely below 23°C. Annual rainfall is comparable at 1400-1600 mm, heavily skewed to May-October, though Brac's terrain can enhance localized showers. Humidity remains high at 75-85%, and sunshine is plentiful. These quieter islands appeal to expats seeking seclusion, with the same hurricane exposure but fewer cold front impacts.
Consistently balmy with trade winds offering relief from humidity, ideal for diving and nature escapes amid predictable rainy bursts.
The Cayman Islands offer a stable tropical savanna climate with year-round warmth, high humidity, and rainfall concentrated in the May-October wet season, showing negligible variation across its small islands. Expats and residents enjoy endless sunshine and beach-friendly temperatures but must contend with hurricane risks and muggy conditions. This predictable paradise suits sun-seekers while requiring adaptation to wet-season downpours and storm preparedness.
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