How warm is Florida Keys in August?

Typical highs are about 86°F and the sea is about 88°F. That is warm enough for long swims without a wetsuit.

Is August hurricane season in Florida Keys?

August falls in the tropical storm season; the typical risk on a given day is moderate. It peaks in September. Travel insurance and flexible bookings help.

How crowded is Florida Keys in August?

Typically moderate, around Mexico summer vacation and US summer school break. The quietest months are usually September and October.

Florida Keys in August

August is one of the weakest months for a beach trip to Florida Keys: a typical day grades A-, the 10th best of the 12 months. Expect highs near 86°F, water around 88°F and about a 59% chance of rain on a given day. Beaches are typically moderate (Mexico summer vacation and US summer school break). It is hurricane season, with moderate storm risk.

Typical dayA-10th of 12 months

Highs / water86°FSea 88°F

Rain chance59%on a given day

Waves1.9 fttypical

CrowdsModerateMexico summer vacation

Storm riskModeratehurricane season

Florida Keys month by month

Typical grade and high for each month. Higher is better: A+ to F.

July: A- · August: A- · September: B. The best months are usually April, May and November, and the weakest are January and September.

Best beaches in Florida Keys in August

Resorts with the best typical August, and their grades for the next few days.

Beach	Typical Aug	This week
Baker's Cay Resort Key Largo	A-	SatA-SunA-MonATueAWedA-
Playa Largo Resort & Spa	A-	SatA-SunA-MonATueAWedA-
Islander Resort	A-	SatB+SunA-MonA-TueA-WedA-
Cheeca Lodge & Spa	A-	SatB+SunA-MonA-TueA-WedA-
Casa Morada	A-	SatA-SunA-MonA-TueAWedA-
The Moorings Village	A-	SatB+SunA-MonA-TueA-WedA-
Hawks Cay Resort	A-	SatA-SunA-MonA-TueAWedA
Tranquility Bay Beachfront Resort	A-	SatA-SunA-MonATueA-WedA-

Grades for the next few days from Veabird's beach forecast, updated Oct 3, 18:00 UTC. Higher is better: A+ to F.

Better beach options in August

Further afield: Oʻahu (A), Maui (A) and Kauaʻi (A-). Every destination in August.

Questions

Is August a good time to visit Florida Keys?: August is one of the weakest months for a beach trip to Florida Keys: a typical day grades A-, the 10th best of the 12 months. Expect highs near 86°F, water around 88°F and about a 59% chance of rain on a given day. Beaches are typically moderate (Mexico summer vacation and US summer school break). It is hurricane season, with moderate storm risk.
How warm is Florida Keys in August?: Typical highs are about 86°F and the sea is about 88°F. That is warm enough for long swims without a wetsuit.
Is August hurricane season in Florida Keys?: August falls in the tropical storm season; the typical risk on a given day is moderate. It peaks in September. Travel insurance and flexible bookings help.
How crowded is Florida Keys in August?: Typically moderate, around Mexico summer vacation and US summer school break. The quietest months are usually September and October.

Plan it

Florida Keys: this week's forecast, beach by beach
Sargassum Report: this week, updated every Monday
Compare dates and beaches on the map

Typical-month numbers from Veabird's year-ahead outlook for the 17 resorts here (median resort): 6 years of ERA5 climate normals, the seasonal pattern of the Atlantic sargassum belt, holiday crowd calendars and historical storm tracks. Any given year can differ; check the 16-day forecast before you go.