Weather in Costa Rica in August

August is generally the mid-point of the rainy season (May to November) in Costa Rica, which means plenty of heavy showers but also part of the green season – effectively winter – which sees the countryside and rainforest morph into a bright and luscious palette of emerald, jade and dazzling green.

August in Costa Rica at a glance

• Average temperatures range from 75°F to 89°F (24°C to 32°C).
• August in Costa Rica marks the rainy season, but visitors can still enjoy warm temperatures and occasional sunny days. 
• Coastal areas tend to be hotter and more humid, while higher elevation regions offer cooler temperatures.
• You can benefit from cheaper prices and fewer crowds during August.

What is the weather like in Costa Rica in August?

Despite being the rainy season, Costa Rica's weather can vary significantly depending on the region. Although the best time to visit Costa Rica is between mid-December and April, the warm weather between the downpours means that travelers may find more deals in August. Here's what to expect in terms of the weather.

This is in the middle of the rainy season in Costa Rica, so you can expect some rain and higher humidity levels. However, the weather can be unpredictable, and you may still get some sunny days. If you're okay with the occasional rain shower, you can still enjoy all the outdoor activities that Costa Rica has to offer, especially wildlife-spotting and surfing.

Traveling in Costa Rica in August? Check out these great itineraries.

Is Costa Rica warm in August?

In August, the average temperature in most regions of Costa Rica ranges from 70°F to 80°F (21°C to 26°C). However, it's important to note that specific temperatures can vary depending on the region and elevation.

Generally, coastal areas tend to be hotter and more humid, while higher elevation regions, such as the Central Valley and mountainous areas, offer cooler temperatures. Overall, August in Costa Rica offers warm and pleasant weather, making it an appealing time to explore the country's lush rainforests, stunning beaches, and vibrant biodiversity.

Traveling in a different month? Read all about the best time to visit Costa Rica

Is August a good time to visit Costa Rica?

August is a low season for tourism in Costa Rica, which means you can often find cheaper prices and fewer crowds. If you're looking for a more relaxed and less crowded experience, then August might be a good time to visit.

August is the peak season for the desove, or egg-laying of endangered marine turtles, inside Parque Nacional Tortuguero. Few are disappointed, with the majority of tours during laying seasons (March to May and July to Oct, though most will lay in August) resulting in sightings of the surreal procession of the reptiles from the sea to make their egg-nests in the sand.

While turtles have been known to lay in the daylight (the green turtles and hawksbills nest mainly from July to October, with August the peak month, while the leatherbacks may come ashore from March to May), it is far more common for them to come ashore in the relative safety of night.

Gray-sand Playa Hermosa, 5km south of Jacó, becomes a playground for hotshot surfers in August. Pummelled by powerful waves, the 6 miles long strip rivals Dominical for having the most consistent beach breaks on Costa Rica’s Pacific coast. Steep sandbars cause waves to break hard, fast and close to the shore, most impressively during the rainy season between May and August – with the best breakers in front of Terraza del Pacífico and the Backyard Hotel.

On this tailor-made trip to Beaches and Volcanoes, you have a chance to escape to Arenal for volcanoes, waterfalls and wildlife reserves. Enjoy gentle hikes or partake in adrenaline-fuelled river rafting. Then journey down to Costa Rica’s Central Pacific for some sand and surf fringed by dense forest that’s teeming with wildlife.

What better way to plan a trip than to rely on personalized experiences? Our content manager has traveled to Costa Rica and shares with you what to consider when planning your trip.

Average rainfall in August

In the Central Valley region, which includes San Jose, August marks one of the rainiest periods of the year, with an average rainfall of approximately 18 inches (457 mm) throughout the month.

This drops along the North Pacific Coast, specifically around Guanacaste, where the average rainfall is around 10 inches (254 mm) throughout August. On the Caribbean Coast, precipitation levels increase again, with an average of around 16 inches (406 mm) of rainfall experienced throughout the month.

Just starting to plan your trip? Find out how many days are best to spend in Costa Rica depending on your goals.

Festivals and events in Costa Rica in August

There are several festivals and events that take place in Costa Rica during the month of August. Here are some of them:

• El Día de La Negrita (Virgin of Los Angeles Day; August 2): Worshippers make a pilgrimage to the basilica in Cartago to venerate the miraculous Black Virgin of Los Angeles (La Negrita), the patron saint of Costa Rica.
• Assumption Day and Mother’s Day (15 August); This is a national bank vacation with schools and businesses closing for the vacation.
• National Parks Day (Día de los Parques Nacionales; 24 August): This public vacation is dedicated to celebrating the country's extensive network of national parks and protected areas, which cover more than 25% of the country's land area.

Plan your trip with our Costa Rica itineraries

Our Costa Rica itineraries are crafted to help you experience the best of the country, stress-free. Think of them as a starting point — perfect for planning, but flexible enough to adjust to your own pace and interests. After all, travel is about freedom, but a little planning goes a long way.

• Costa Rica itinerary 5 days: Get a taste of Costa Rica with a whirlwind visit to Arenal’s volcano and Monteverde’s cloud forests. Perfect if you’re short on time but craving adventure.
• Costa Rica itinerary 7 days: Spend a week exploring Arenal, Monteverde, and the Pacific coast’s beaches. A balanced mix of lush landscapes, wildlife, and relaxation.
• Costa Rica itinerary 10 days: Dive deeper with stops at Arenal, Monteverde, Tortuguero’s jungle canals, and Manuel Antonio’s beaches. Ideal for a blend of rainforest, wildlife, and coastal vibes.
• Costa Rica itinerary 14 days: Two weeks to soak up Costa Rica’s best: Arenal, Monteverde, Tortuguero, and both coasts, including the wild Osa Peninsula. Perfect for serious nature lovers.

Still haven't decided where you're going this summer? Explore our list of the best August vacation destinations.