Year-round climate
Cayman has a tropical marine climate — warm and humid year-round with a wet and dry season. There is no winter. Temperatures rarely drop below 75°F (24°C) even at night, and daytime highs typically reach 85–90°F (29–32°C).
- Humidity: 70–90% year-round. The dry season is drier but still humid by continental standards.
- Trade winds: the easterly trade winds (10–20 mph) make coastal areas more comfortable. East-facing properties benefit.
- Rain: afternoon showers are common May–October. They are usually brief (20–40 minutes) and intense.
- AC reality: you will run air conditioning year-round. This is a significant utility cost ($200–$600/month).
- Sun: UV index is very high. Sunscreen, hats, and shade are daily considerations, not vacation accessories.
| Season | Months | Temperature | Rain | Notes |
|---|---|---|---|---|
| Dry season | Nov–Apr | 77–85°F | Low | Most comfortable. Trade winds keep humidity manageable. Peak tourism. |
| Wet season | May–Oct | 80–90°F | Higher | More humid. Afternoon showers common. Hurricane season overlaps. |
| Hottest | Jul–Sep | 85–92°F | Moderate | Peak heat and humidity. AC is essential. |
| Coolest | Jan–Feb | 74–82°F | Lowest | Most pleasant. Occasional cold fronts bring brief dips. |
Hurricane season
Hurricane season runs June 1 to November 30, with the peak risk period in August through October. Grand Cayman is in the hurricane belt and has been directly hit by major storms — most notably Hurricane Ivan in 2004, which caused catastrophic damage.
- Ivan (2004): Category 5, direct hit. Caused billions in damage, extensive flooding, building destruction. The defining weather event in Cayman's modern history.
- Since Ivan: building codes have been significantly strengthened. Modern construction is built to higher wind and flood standards.
- Frequency: direct hits are relatively rare (every 15–25 years for a major hurricane). But near-misses and tropical storms happen more frequently.
- The risk is real but manageable: Cayman has excellent warning systems, evacuation procedures, and building standards. Most residents live here year-round without incident.
Hurricane preparedness for residents
Every Cayman resident should prepare for hurricane season with supplies, a plan, and proper insurance. The government and local media provide comprehensive guidance each year.
- Hurricane supply kit: 7 days of water (1 gallon per person per day), non-perishable food, flashlights, batteries, first aid kit, medications, important documents in waterproof container, cash.
- Know your zone: the government assigns hurricane shelter zones. Know yours and the nearest shelter route.
- Shutters: most modern properties have hurricane shutters or impact-resistant windows. Test them before the season starts.
- Evacuation: some residents leave the island during peak season (August–September) as a precaution. Not mandatory but common for those with easy access to flights.
- Government updates: follow the National Weather Service, Hazard Management Cayman Islands (HMCI), and local radio (Radio Cayman) during storms.
- Post-storm: expect 1–7 days without power after a major storm. A generator or battery backup system is worth considering.
Insurance and storm costs
Property insurance — specifically hurricane and windstorm coverage — is one of the most important financial decisions for Cayman homeowners.
- Hurricane/windstorm insurance is mandatory for mortgaged properties.
- Annual premiums: 0.5–2% of property value depending on location, construction, and elevation.
- A $750K condo might cost $3,750–$15,000/year for wind coverage.
- Flood insurance: separate from windstorm. Important for low-lying and coastal properties.
- Deductibles: hurricane deductibles are typically 2–5% of insured value (not the claim amount).
- After Ivan: many insurers left the market. Remaining providers charge higher premiums. This is a significant ongoing cost of Cayman property ownership.
Living with the weather
Most residents love the Cayman climate despite the heat and hurricane risk. The key is adaptation — both practical and psychological.
- AC management: set it to 76–78°F for comfort without shocking electricity bills. Ceiling fans help.
- Clothing: light, breathable fabrics year-round. Business dress is more relaxed than mainland offices.
- Outdoor timing: morning (before 10 AM) and late afternoon (after 4 PM) are the best times for outdoor activity.
- Car AC: your car AC will run constantly. Make sure it works well before purchasing a vehicle.
- Mental adjustment: if you hate heat and humidity, Cayman may not be for you. Visit during July–August to test your tolerance before committing to a move.