Is the weather good in Costa Rica in August 2025?
For the past few decades, the average daily temperatures in Costa Rica during August have been around +81°F.
In Costa Rica the temperature rarely varies more than seven degrees between the different parts with the highest temperature +81°F in San Jose to +75°F in San Jose. So you should be able to pack for similar conditions wherever you go in the country.
Temperature, wind and humidity in August
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+81°F
Avg. max. temperature
483 mmTotal precipitation
Our opinion: Costa Rica has OK weather in August.
Costa Rica in August – what city is the…
- rainiest? San Jose, with an average of 24 mm of rain and humidity of 82%;
- warmest? San Jose, with daytime temperatures averaging +75°F;
- windiest? San Jose, with an average of 2 m/s;
- coolest? San Jose, with daytime temperatures averaging +75°F;
How good is the weather in Costa Rica in August?
During August, the Costa Rica is characterized by variable weather with air pressure around 1012 HPa and therefore elements of sun, rain, and wind – with a little extra emphasis on the latter two. The humidity in August ranges between 82% in San Jose and 82% in San Jose.
How warm is it in Costa Rica during August?
Variable weather with sun, rain and wind: +81°F in average daily temperature.
This is how hot it usually is in August
The average daily temperatures above don't tell you everything about how hot it can be in Costa Rica. For example, cold nights can make a big difference for those staying in tents or unheated houses. Extra hot days, on the other hand, can make a big difference for those who plan to engage in demanding physical training or competition. So here are some more temperatures for August:
- Average maximum temperature for the month: +81°F;
- Average minimum temperature for the month: +68°F;
- Highest monthly temperature: +81°F;
- Lowest monthly temperature: +68°F;
Monthly temperatures:
- Warmest: April with an average +86°F during the day;
- Coldest: January with an average +81°F of the day;
- Hottest month in hottest city: March in San Jose;
- Coldest month in coolest city: January in San Jose;
Can you swim in Costa Rica in August?
Here are the minimum and maximum water temperatures in cities in Costa Rica in August:
You can definitely swim in San Jose in August, with the water temperature of +83°F and up.
Winds in Costa Rica during August
Wind speed in Costa Rica in August based on historical data:
August tends to offer light winds averaging 2 m/s. However, coastal cities may experience breezes during the mornings and afternoons.
Comparison between cities in August:
- Highest average wind speed: San Jose with 3 m/s;
- Lowest average wind speed: San Jose with 3 m/s;
- Windiest day of the month: San Jose with 3 m/s;
- The least windy day of the month: San Jose with 2 m/s;
Humidity and precipitation in Costa Rica in August
Amount of rainfall in mm during August in Costa Rica based on historical data:
August tends to be an extremely humid month with 79% humidity and 298 mm rainfall. In general the humidity tends to be a little lower in mountainous regions and more humid closer to water.
Comparison between cities in August:
- Highest average rainfall: San Jose with 753 mm;
- Lowest average rainfall: San Jose with 753 mm;
- Most number of rainy days: San Jose with 19 rainy days;
- Least number of rainy days: San Jose with 19 rainy days;
- Highest risk of rain during the day: San Jose with 61%;
- Least risk of rain during the day: San Jose with 61%;
- Highest average humidity: San Jose with 82%;
- Lowest average humidity: San Jose with 82%;
Tips for traveling to Costa Rica in August
Looking for some tips for traveling to the sun, snow, or whatever you're aiming for Costa Rica? Activities, weather, and clothing are closely linked. In addition, it's important to pack only what you really need so you don't have to worry about heavy packing or paying extra baggage fees.
Here is some advice on what to pack and what kind of activities you can do in the Costa Rica based on the weather that August is expected to bring. The advice applies to the country as a whole – local weather and possible activities may differ somewhat.
rainy, warm weather with light winds and very high humidity in August
Pack right for August
The weather makes a difference when it comes to packing - especially which items should go in your suitcase. The tips below are designed to help you pack light and right without carrying more than necessary.
- For light showers, an umbrella or a thin and light rain cape is usually sufficient, while more rain may require rainwear and rain boots.
- Warm - neither hot nor cool, are probably the most comfortable when you think of sunbathing. Shorts, shorter skirts or dresses, tank tops and t-shirts are the basics here. If you're going to a seaside resort, don't forget your swimwear and maybe even a snorkel, mask and flippers.
- Light winds are probably most comfortable in hot weather but is cooling in cool and cold weather. If it is hot (when the air temperature is about 30 degrees), the wind can have a warming effect. A thin, windproof jacket and long trousers help to counteract these effects.
- High humidity means that the air conducts heat to and from the skin more easily. For example, if the air is hot (above skin temperature), it will be harder to stay cool. On the other hand, if the air is cool or cold, it is more difficult to stay warm. In high humidity, the choice of clothing makes less of a difference. However, your physical activity plays a bigger role.
FAQ
Frequently asked questions about the weather in Costa Rica in August:
What can you do outside when it's warm in Costa Rica?
Bathing and sunbathing can be suitable. Warm (but not hot) days are also good for activities that are not so physically demanding: sightseeing on foot, by boat, on a scooter, camel riding. You can also exercise easily as long as you make sure to cool down and quench thirst.
Is August a good time to visit Costa Rica?
It’s always a good time to visit Costa Rica, but the weather is changeable in August, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality. Monthly weather in Costa Rica
Source of the data
For this page, we’ve looked at the typical weather in Costa Rica, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.