Key West in August
August in Key West brings highs around 91°F (33°C), lows near 80°F and about 15 rainy days. The sun sets around 8:02 pm. The sea is about 86°F (30°C). It's off season for sightseeing: hot and quieter.
Photo: Julian Lupyan, CC0
What August is good for in Key West
Each activity rated for August's weather and sea.
August next to July and September
| Month | July | August | September |
|---|---|---|---|
| High | 90°F (32°C) | 91°F (33°C) | 89°F (32°C) |
| Low | 81°F (27°C) | 80°F (27°C) | 79°F (26°C) |
| Rainy days | 12 | 15 | 16 |
| Sea | 85°F | 86°F | 85°F |
| Sunset | 8:19 pm | 8:02 pm | 7:32 pm |
| Daylight | 13 h 31 min | 13 h 00 min | 12 h 19 min |
Averages for Key West Int'l, Florida, 1991–2020; sunrise and sunset on the 15th. Key West water temperature by month.
Tours in Key West
Southernmost Food & Cultural Walking Tour by Key West Food ToursFrom $94View 
Key West Hop-On Hop-Off Trolley TourFrom $56View 
Key West Conch Tour TrainFrom $45View 
Guided Bike Tour of Old Town Key WestFrom $59View 
Key West Mangrove Kayak Eco TourFrom $80View 
Key West Ghosts and Gravestones Trolley TourFrom $40View
Tours from Viator. Good Outing may earn a commission when you book, at no cost to you.
Questions
Is August a good time to visit Key West?
It's off season for sightseeing: hot and quieter. The most comfortable months overall are January, February, March and December.
How hot is Key West in August?
Average highs are about 91°F (33°C) and lows about 80°F (27°C).
Does it rain much in Key West in August?
August averages 15 rainy days, against 16 in the wettest month.
How warm is the sea in Key West in August?
About 86°F (30°C). Warm enough for long swims and snorkeling.
