Grand Cayman in August
In August, Grand Cayman averages 31°C (88°F) during the day and 27°C (81°F) at night, with frequent rain — about 28 days of the month see precipitation (100 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
It's peak hurricane season in Grand Cayman during August. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
How August compares to the rest of the year in Grand Cayman
August is one of the warmest months in Grand Cayman (1st of 12) and one of the wettest months (3rd of 12). Daytime temperature runs 2°C above the annual average (29°C). August runs roughly the same as July (31°C) and stays flat into September.
August sunrise & sunset in Grand Cayman
Times shown for Grand Cayman local time (America/Cayman), calculated for the 15th of August. They shift by a few minutes day to day across the month.
Photography light in Grand Cayman — August
Golden-hour and blue-hour windows for the 15th of August, in Grand Cayman's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Grand Cayman in August
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on August's tier (Shoulder) and Grand Cayman's popularity.
Crowds & pricing — August in Grand Cayman
Grand Cayman is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: Northern Hemisphere summer holidays peak hazard season (1 active)
Sun & mosquito risk — August in Grand Cayman
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Grand Cayman — August
Across the year Grand Cayman's sea swings from 26.9°C (February) to 30.6°C (August) — August sits at 30.6°C.
Grand Cayman in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 27°C / 81°F | 25°C / 76°F | 41 mm | 24 | — |
| February | 27°C / 81°F | 25°C / 76°F | 37 mm | 23 | — |
| March | 28°C / 82°F | 25°C / 76°F | 50 mm | 24 | — |
| April | 29°C / 84°F | 25°C / 78°F | 48 mm | 24 | — |
| May | 29°C / 85°F | 26°C / 78°F | 120 mm | 29 | — |
| June | 30°C / 86°F | 27°C / 80°F | 120 mm | 26 | — |
| July | 31°C / 87°F | 27°C / 81°F | 54 mm | 29 | — |
| August | 31°C / 88°F | 27°C / 81°F | 100 mm | 28 | — |
| September | 31°C / 87°F | 27°C / 81°F | 104 mm | 28 | — |
| October | 30°C / 85°F | 26°C / 80°F | 155 mm | 28 | — |
| November | 29°C / 83°F | 26°C / 78°F | 104 mm | 26 | — |
| December | 28°C / 82°F | 25°C / 78°F | 51 mm | 23 | — |
Other cities with similar August weather
🌍 See the full ranked list of climate twins for Grand Cayman in August →
Frequently asked questions
How hot is Grand Cayman in August?
In August, Grand Cayman averages a high of 31°C (88°F) and a low of 27°C (81°F) — generally hot.
Does it rain a lot in Grand Cayman in August?
August is quite rainy in Grand Cayman, with about 28 rainy days on average.
Is August a good time to visit Grand Cayman?
August is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Grand Cayman in August?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full August packing list for Grand Cayman for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.