Costa Rica in august: average Weather, Temperature and Climate, Where to go?
Weather in Costa Rica in august 2025
Below, you have access to the weather forecast for august for most popular cities in Costa Rica. These forecasts are probabilities for august from weather reports for over 10 years. The percentage indicates the probability of having the weather mentioned.
Average weather in august in San José
very bad weather
Weather at 6am
16°C
Moderate rain at times
30% of time
23%
17%
17%
Weather at 12pm
25°C
Moderate rain at times
51% of time
34%
10%
5%
Weather at 6pm
20°C
Heavy rain
71% of time
21%
5%
4%
Weather at 3am
16°C
32%
26%
15%
15%
Where to go in Costa Rica in august?
Where to go in Costa Rica in august: destination map
Where to go in each region in august?
| Caribbean coast of Costa Rica (Tortuguero, Puerto Limón, Manzanillo...) | 26°C to 30°C | 11 à 30 days | 29°C | tolerable weather* |
| Central valley (San José, San Isidro, Cartago...) | 23°C to 30°C | 15 à 30 days | very bad weather* | |
| North of Costa Rica (La Fortuna, Quesada, Boca San Carlos...) | 25°C to 31°C | 18 à 26 days | very bad weather* | |
| Pacific coast of Costa Rica (Montezuma, Puntarenas, Puerto Jiménez...) | 26°C to 31°C | 17 à 30 days | 29°C | very bad weather* |
| Provincia Guanacaste (Tamarindo, La Cruz, Liberia (Guanacaste)...) | 30°C to 31°C | 13 à 25 days | 29°C to 30°C | very bad weather* |
Where should you go in Costa Rica in august when it comes to the weather?
Remember:
The climate in Costa Rica in august ranges from tolerable to very bad depending on the region and city.
The climatic conditions of Costa Rica throughout August are characterized by the presence of heat and especially, the abundance of rains. Because of the geographical location of each locality, some are more humid - as is the case in San José, while others are less so. Still, the climate throughout August in Costa Rica does not lend itself to outdoor activities.
The West Coast of Costa Rica in August
Apart from the locality of Tamarindo which is experiencing a relative decline in rainfall, most cities on the west coast of Costa Rica are experiencing the throes of the rainy season; through the abundance of showers. Montezuma or Puntarenas are not spared, with rainy days covering the whole of the month.
The Center of Costa Rica in August
Besides the freshness of the morning, the showers - which can be moderate or very intense - occur every day throughout the month. Since the moments of sunshine correspond only to a few cloud thinnings, impermeable clothes is very important. The weather in Costa Rica throughout August does not lend itself to outdoor activities.
The East Coast of Costa Rica in August
Puerto Limón allows to enjoy sunny moments. One will then have the opportunity to participate in outdoor activities, while enjoying the pleasant warmth.
Climate in Costa Rica in august
Climate in San José in august
In august, maximum temperature is 25°C and minimum temperature is 16°C (for an average temperature of 20°C). The climate quite enjoyable in that locality in the month of august. With 799mm over 26 days, the weather is rather to rain for your vacations. Consider to pack adapted clothes.
| August | |||
| Average temperature | 20°C | ||
| Highest temperature | 25°C | ||
| Lowest temperature | 16°C | ||
| Rainfall | 799mm | ||
| Number of days with rainfall | 26 day(s) (83%) | ||
| Humidity | 94% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 60% | ||
| Length of day | 12:26 | ||
| Our opinion at whereandwhen.net | very bad |
Climate in La Cruz in august
In the month of august, maximum temperature is 31°C and minimum temperature is 26°C (for an average temperature of 28°C). The climate is very warm there in this month. With 251mm over 16 days, rain may occur throughout your trip. But this is rather moderate and you will not be too bothered by it.
With a correct weather, august is okay (but not the best time) for traveling in La Cruz in Costa Rica.
| August | |||
| Average temperature | 28°C | ||
| Highest temperature | 31°C | ||
| Lowest temperature | 26°C | ||
| Sea temperature | 29.2°C | ||
| Rainfall | 251mm | ||
| Number of days with rainfall | 16 day(s) (51%) | ||
| Humidity | 86% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 44% | ||
| Length of day | 12:28 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Montezuma in august
In the month of august, maximum temperature is 30°C and minimum temperature is 25°C (for an average temperature of 27°C). The climate is very warm in that locality in the month of august. With 513mm over 25 days, you may find yourself often in the rain for your vacations. Consider to bring clothes for rain.
| August | |||
| Average temperature | 27°C | ||
| Highest temperature | 30°C | ||
| Lowest temperature | 25°C | ||
| Sea temperature | 29.1°C | ||
| Rainfall | 513mm | ||
| Number of days with rainfall | 25 day(s) (79%) | ||
| Humidity | 88% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 42% | ||
| Length of day | 12:26 | ||
| Our opinion at whereandwhen.net | very bad |
Climate in Puerto Limón in august
In the month of august, the mean temperature in Puerto Limón is 28°C (maximum temperature is 30°C and minimum temperature is 25°C). The climate is very hot here in august. With 347mm over 15 days, you risk getting wet slightly for your trip. But this is reasonably and you will not be too bothered by it.
With proper weather, august is okay (but not good month) for traveling in this city in Costa Rica.
| August | |||
| Average temperature | 28°C | ||
| Highest temperature | 30°C | ||
| Lowest temperature | 25°C | ||
| Sea temperature | 28.9°C | ||
| Rainfall | 347mm | ||
| Number of days with rainfall | 15 day(s) (50%) | ||
| Humidity | 76% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 38% | ||
| Length of day | 12:27 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Puntarenas in august
In august, the mean temperature in Puntarenas is 28°C (maximum temperature is 31°C and minimum temperature is 25°C). The climate is very warm in that locality in the month of august. With 487mm over 21 days, you will suffer the rain during your trip. So remember to pack adapted clothes.
| August | |||
| Average temperature | 28°C | ||
| Highest temperature | 31°C | ||
| Lowest temperature | 25°C | ||
| Sea temperature | 28.9°C | ||
| Rainfall | 487mm | ||
| Number of days with rainfall | 21 day(s) (69%) | ||
| Humidity | 86% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 42% | ||
| Length of day | 12:26 | ||
| Our opinion at whereandwhen.net | bad |
All cities in Costa Rica in august
| San José in august | very bad weather |
| La Cruz in august | tolerable weather |
| Montezuma in august | very bad weather |
| Puerto Limón in august | tolerable weather |
| Puntarenas in august | bad weather |
| Tamarindo in august | tolerable weather |
| Tortuguero in august | tolerable weather |
| Boca San Carlos in august | bad weather |
| Cartago in august | very bad weather |
| La Fortuna in august | bad weather |
| Liberia (Guanacaste) in august | tolerable weather |
| Manzanillo in august | good weather |
| Puerto Jiménez in august | very bad weather |
| Quesada in august | very bad weather |
| San Isidro in august | very bad weather |
| Alajuela in august | very bad weather |
| Bananito Sur in august | tolerable weather |
| Cerro Chirripo in august | very bad weather |
| Dominical in august | very bad weather |
| Escazu in august | very bad weather |
| Esterillos in august | tolerable weather |
| Golfito in august | very bad weather |
Weather data for Costa Rica in august:
Weather data for Costa Rica in august is derived from an average of the weather forecast since 2009 in Costa Rica. There is a margin of error and these forecasts are to be considered as general information only. The weather in Costa Rica can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Costa Rica.