Things to Do in Costa Rica in August

August marks the start of Costa Rica's southern humpback whale migration. The waters off Marino Ballena National Park and Drake Bay become a front-row seat to one of the Pacific's great wildlife spectacles. Pods with calves move slowly enough that even modest tour boats can keep pace at a respectful distance. On calm mornings, the sound of a breach carries across the water before you see it. The warm, plankton-rich currents off Uvita draw mothers with newborns close to shore, sometimes within a few hundred meters of the famous whale tail sandbar. August is early enough that boats are not yet crowding the sighting zones the way they do in September and October. Morning departures from Uvita or Drake Bay tend to have calmer seas. Afternoon chop picks up after noon and can turn a three-hour tour into a wet, bouncing affair. Book at least a week ahead through licensed operators who carry marine biologist guides. Confirm that the operator follows the national park's approach-distance regulations. See current whale watching options in the booking section below.

August's mist and rain are not obstacles in Monteverde. They are the entire point. The cloud forest earns its name this month. Fog rolls through the canopy at arm's length, coating bromeliads and orchids in fine mist that makes every surface gleam. Hanging bridges and canopy walkways suspended 40 meters (130 feet) above the forest floor put you at eye level with resplendent quetzals. They happen to be nesting in August. Your odds of a sighting increase dramatically compared to dry season. The smell up here is hard to describe: wet moss, decomposing leaves, and something faintly sweet from the orchids that bloom in green-season moisture. Temperatures at 1,400 meters (4,600 feet) elevation hover around 18°C (64°F). That is genuine relief from the lowland humidity. Rain gear is non-negotiable. The forest in rain is a different organism than the forest in sun: louder, greener, more alive. The leeches are real but harmless. Locals treat them as a sign the ecosystem is healthy rather than a reason to stay indoors.

Rio Celeste runs an impossible turquoise in August. The color intensifies when rainfall drives mineral concentrations to their green season peak. The river's blue comes from volcanic minerals mixing with sulfur compounds at the Teñidero, and in August, the flow rate amplifies the effect until the water looks artificially dyed. Tubing operators run routes downstream from Tenorio Volcano National Park through secondary forest. Howler monkeys call from the canopy. Toucans flash across the corridor of trees overhead. The water temperature sits around 22°C (72°F). Cool enough to feel refreshing after the hike in. Not cold enough to need a wetsuit. The waterfall at the park's heart drops 30 meters (98 feet) into a turquoise pool that is, unfortunately, closed to swimming. The visual alone justifies the 3.6 km (2.2 mile) round-trip trail through mud that August renders gloriously sloppy. Wear shoes you do not care about. They will not recover.

Manuel Antonio in August is a different park. The overcrowded dry-season version gets 150,000 visitors a month. August visitor numbers drop enough that the trails from the main entrance to Playa Espadilla Sur feel almost private in early morning. The white-faced capuchins and two-toed sloths that live in the canopy above Trail 1 behave more naturally with fewer humans underneath. The park's 1,983 hectares (4,899 acres) of tropical rainforest hit maximum density in August. A guided walk with a naturalist who carries a spotting scope transforms a pretty beach hike into a wildlife census. Expect to see three or four sloth species. Multiple monkey troops. Iguanas the size of your forearm. Poison dart frogs whose fluorescent blue skin stands out against the wet leaf litter. The heat sits around 27°C (80°F) with 70% humidity. You will be drenched in sweat within twenty minutes regardless of rain. Carry water. Start at 7 AM when the park opens. Plan to be out before the 2 PM rain hits.

August brings consistent swells to Costa Rica's Pacific coast. The combination of warm water, uncrowded lineups, and forgiving beach breaks makes it one of the better months for learning to surf anywhere in Central America. Playa Sámara on the Nicoya Peninsula is where most instructors send beginners. The bay faces slightly away from open ocean, producing long, rolling waves that break gently over sand. The water is bath-warm at 28°C (82°F) and stays that way through the afternoon. More experienced surfers head south to Dominical. August swells hit overhead there. The rivermouth break at the south end produces fast lefts that reward commitment and punish hesitation. Even Dominical empties out in green season. Lineups that hold thirty surfers in January might have five in August. The tradeoff is the afternoon rain, which rolls in as dark clouds over the coastal range around 2 PM. Most surfers are already out of the water by then. They time sessions for the 6 AM to noon window when conditions are clearest and winds are offshore.

August is peak season for several ingredients that define Costa Rican cooking. These rarely appear in tourist-facing restaurants. Look for chayote squash from the Central Valley. Pejibaye palm fruit whose starchy orange flesh tastes like a cross between chestnut and sweet potato. Cas fruit that locals blend into the tart, pale-green refrescos you see at every soda in the country but never in any guidebook. Cooking classes in the Central Valley and around La Fortuna put you in open-air kitchens. The smell of wood-fired comals mixes with the petrichor of afternoon rain. You will learn that gallo pinto, the rice-and-beans dish that Costa Rica claims as its own over Nicaragua's objections, depends entirely on the brand of Lizano salsa used and the overnight soak of the black beans. Casados, the set-lunch plate that every working Tico eats at noon, vary by region. These variations reveal more about Costa Rica's internal geography than any map. Caribbean-side casados carry coconut rice and plantain. Pacific versions lean heavier on fried fish and curtido slaw.