How warm is Costa Rica's Caribbean coast in August?

Typical highs are about 84°F and the sea is about 85°F. That is warm enough for long swims without a wetsuit.

Is there sargassum in Costa Rica's Caribbean coast in August?

In a typical year seaweed is moderate in August. It is usually lightest in January and July and heaviest in September and October. Landings vary a lot by year, wind and currents; Veabird's weekly sargassum report and each beach's page have the current forecast.

Is August hurricane season in Costa Rica's Caribbean coast?

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

How crowded is Costa Rica's Caribbean coast in August?

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

Costa Rica's Caribbean coast in August

August is one of the weakest months for a beach trip to Costa Rica's Caribbean coast: a typical day grades C+, the 11th best of the 12 months. Expect highs near 84°F, water around 85°F and about a 93% chance of rain on a given day. Sargassum (seaweed) is usually moderate in August. Beaches are typically moderate (Mexico summer vacation and US summer school break).

Typical dayC+11th of 12 months

Highs / water84°FSea 85°F

Rain chance93%on a given day

SeaweedModeratetypical year

CrowdsModerateMexico summer vacation

Storm riskLowhurricane season

Costa Rica's Caribbean coast month by month

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

July: C+ · August: C+ · September: C+. The best months are usually January, February and March, and the weakest are August and September.

Best beaches in Costa Rica's Caribbean coast in August

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

Beach	Typical Aug	Seaweed	This week
Casa Grande Eco Lodge at Pacuare Reserve	B-	Low	SatB+SunC+MonC+TueC+WedC+
Hotel Playa Bonita	B-	Low	SatB+SunC+MonC+TueB-WedC+
Hotel Palace	B-	Low	SatB+SunB-MonC+TueB-WedB-
Hotel Playa Westfalia	B-	Low	SatB+SunBMonC+TueC+WedC+
Goddess Garden Resort	B-	Low	SatB+SunBMonC+TueC+WedC+
Umami Hotel Garden Spa	B-	Low	SatBSunBMonCTueC+WedC
Coco Loco Lodge	B-	Low	SatBSunBMonC-TueC+WedC
Ocean View Lodge	C+	Low	SatBSunBMonCTueC+WedC

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

Elsewhere in Central & South America, Belize (B+), Roatán & the Bay Islands (B) and Panama's Pacific beaches (B) usually grade higher in August. Further afield: Oʻahu (A), Maui (A) and Kauaʻi (A-). Every destination in August.

Questions

Is August a good time to visit Costa Rica's Caribbean coast?: August is one of the weakest months for a beach trip to Costa Rica's Caribbean coast: a typical day grades C+, the 11th best of the 12 months. Expect highs near 84°F, water around 85°F and about a 93% chance of rain on a given day. Sargassum (seaweed) is usually moderate in August. Beaches are typically moderate (Mexico summer vacation and US summer school break).
How warm is Costa Rica's Caribbean coast in August?: Typical highs are about 84°F and the sea is about 85°F. That is warm enough for long swims without a wetsuit.
Is there sargassum in Costa Rica's Caribbean coast in August?: In a typical year seaweed is moderate in August. It is usually lightest in January and July and heaviest in September and October. Landings vary a lot by year, wind and currents; Veabird's weekly sargassum report and each beach's page have the current forecast.
Is August hurricane season in Costa Rica's Caribbean coast?: August falls in the tropical storm season; the typical risk on a given day is low. It peaks in September. Travel insurance and flexible bookings help.
How crowded is Costa Rica's Caribbean coast in August?: Typically moderate, around Mexico summer vacation and US summer school break. The quietest months are usually September and October.

Plan it

Typical-month numbers from Veabird's year-ahead outlook for the 41 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.