The month in detail
What to expect in August
In the height of summer, Key West sees high temperatures (30°C). Heat is a factor for outdoor activities. Expect rain on 33% of days — a light raincoat in the bag is recommended. Not the best window, but acceptable if dates are constrained. April (9.1/10) is significantly better if possible.
August ranks 11 out of 12 months in Key West. Compared to July: 5 pts more rainy days, −0.6h of sun per day.
This month's conditions
What it's like in August
UV index
8 · very high
protection essential
Feels like
oppressive heat
24°
Sea
32°C
warm, ideal
Daylight
12.9h of daylight
Air quality
good
AQI 26
Compare
Is August the right month?
The best month in Key West is April (9.1/10), 3.4 pts higher than August.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Key West
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Key West
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.
Country · USA
🗣️LanguageEnglish
💶CurrencyUS Dollar ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘStable
🔥Hottest monthJuly · 30°C
❄️Coolest monthJanuary · 23°C
🌧️Rainiest month ⓘSeptember · 38%
🏖️ Beach holiday
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore
Other destinations in August
If August doesn't convince you for this destination, compare with others.
Location
Where is Key West ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
USATemperate oceanic climate with a 9.1 → 5.7 gap between best and worst month. 10 years of ERA5 data to choose by project.
24.56°N · 81.78°W
Questions
Frequently asked questions
What is the best time to visit Key West?
April is the best month with 26.0°C highs, 24.0°C lows, 10.8h of sunshine and 13.0% rainy days. The months of April & March offer comparable conditions.
How many hours of sunshine does Key West get in April?
Key West averages 10.8 sunshine hours per day in April. It is the sunniest month with a climate score of 8.8/10.
What is the rainiest month in Key West?
September is the most unfavourable month with September has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Key West in April?
In April, overnight lows reach 24.0°C, while afternoon highs average 26.0°C.
Is Key West good in winter?
In winter (December-February), Key West scores 8.0/10 on average — Decent period conditions for cultural visits.. The best month overall remains April with a score of 8.8/10.
When should you avoid Key West?
September is the most difficult month to visit Key West, with September has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Key West in August?
In August, the sea averages 32°C in Key West: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Key West in August?
The average UV index reaches 8 in August in Key West (very high), with about 12.9h of daylight. Protection essential.