Jaco is Costa Rica's original surf town, a two-mile stretch of dark volcanic sand on the Central Pacific coast where consistent waves roll in year-round and the nightlife keeps pace until the small hours. Just 90 minutes from San Jose's international airport, it's the closest major beach destination to the capital, which means Ticos from the Central Valley flood in on weekends to surf, eat fresh ceviche, and blow off steam along Pastor Diaz Avenue. Beyond the beach, you're surrounded by rainforest: Carara National Park sits just north of town with one of the country's largest scarlet macaw populations, the Tarcoles River bridge gives you eye-level views of massive wild crocodiles, and waterfall hikes through the surrounding mountains are a short drive away.
Your best window for Jaco runs from early December through mid-April, except for a stretch in early April when conditions can dip. This is Costa Rica's dry season, and in Jaco it means reliably sunny mornings, minimal rain, and warm temperatures in the low-to-mid 80s°F. January and March are the liveliest months, with peak tourist volumes and the fullest restaurant and bar scene along the main strip. If you're a surfer chasing bigger swells rather than sunshine, the rainy season from May through November brings larger, more powerful waves to Jaco and neighboring Playa Hermosa, with far fewer crowds and lower accommodation prices. For most visitors, though, the December-to-April dry season delivers the complete Jaco experience: dry trails for rainforest hikes at Carara, calm enough seas for Tortuga Island day trips, and long sun-drenched days on the beach.
Spring in Jaco, Costa Rica
March in Jaco is one of the driest months of the year, with just a 3% chance of significant rain, and temperatures reaching their peak. Late March brings the hottest stretch of the entire year, with highs pushing to 88°F (31.1°C) and lows settling around 65°F (18.3°C). This is prime time for booking a surf lesson at the south end of the beach, where long, consistent waves are ideal for beginners, or for hiring a guide to explore Carara National Park when the trails are bone-dry and scarlet macaws are easy to spot against the bright sky.
By April, the landscape begins to shift. Afternoon showers start appearing roughly one day in five, and humidity creeps up. Holy Week, which typically falls in late March or April, draws enormous crowds of Costa Rican families to the beach, so expect packed restaurants and a festive atmosphere along Pastor Diaz Avenue. Seasonal highs average 85.9°F (29.9°C) with lows around 65.6°F (18.7°C), warm enough that you'll want light, breathable clothing and reef-safe sunscreen for any time spent outdoors.
May marks the real transition. Rain chances jump to 40%, and you'll notice the surrounding hillsides turning an even deeper green as the wet season takes hold. Tourism drops noticeably, and accommodation deals start to appear. Surfers, on the other hand, start getting excited: southwestern swells build through May, delivering bigger, more powerful waves at both Jaco Beach and nearby Playa Hermosa. Pack a compact rain jacket for those afternoon downpours, but expect sunny mornings most days.
Summer in Jaco, Costa Rica
June through August is the heart of Jaco's green season, and the town takes on a different character. The morning ritual stays the same: warm, sunny skies perfect for a dawn surf session or a stand-up paddleboarding trip to Playa Mantas, where you can often spot manta rays gliding through the shallows. But by mid-afternoon, clouds roll in off the Pacific and showers arrive. Rain hits on roughly 36% to 44% of days, though it rarely lasts all day. Highs average 83.2°F (28.4°C) and the air stays warm overnight, with lows around 65.7°F (18.7°C).
This is the season serious surfers live for. Southwestern swells push bigger, more consistent waves onto Jaco's beach breaks, and neighboring Playa Hermosa fires with powerful barrel sections that draw experienced riders from around the world. International surf competitions are held at Hermosa during this stretch. With tourism volumes dipping to their quieter range, you'll find shorter waits for zipline canopy tours through the rainforest and more elbow room on ATV excursions to backcountry waterfalls.
The tradeoff is humidity, which climbs into the 70% range and makes the air feel heavier after midday. Bring moisture-wicking fabrics and quick-dry boardshorts. If you're planning a Tortuga Island day cruise, check conditions ahead of time, as seas can be choppier than in dry season. The upside of all that rain is the jungle at its most lush: crocodile safaris on the Tarcoles River become even more dramatic as water levels rise, and Carara's trails are thick with wildlife activity.
Fall in Jaco, Costa Rica
September and October bring the heaviest rains of the year to Jaco, with significant precipitation on roughly 58% to 59% of days. Mornings can still start bright and hot, but the window before afternoon storms narrows. Highs settle around 82.1°F (27.8°C) with lows near 64.7°F (18.2°C), comfortable temperatures that make the muggy air easier to handle. If you're willing to plan your activities around the weather, early mornings are your friend: get out for a beach walk, a horseback ride along the sand, or a birdwatching trip to Carara before noon, then retreat to one of Jaco's restaurants or bars when the skies open up.
Costa Rica celebrates Independence Day in mid-September, and in Jaco the streets fill with parades, traditional dances, and decorations in the national blue, white, and red. It's a genuine cultural moment in a town better known for its party bars, and a great opportunity to connect with local traditions. Tourism hits its lowest point in September, which means deeply discounted rooms and uncrowded beaches. The weekly Friday open-air market continues year-round and is a good place to browse local produce, handmade crafts, and snacks even on a drizzly afternoon.
November brings gradual relief, with rain chances dropping to around 33%. The jungle surrounding Jaco is spectacularly green, and waterfall hikes near Bijagual are at their most dramatic when fed by months of rainfall. Bring waterproof hiking shoes and a dry bag for electronics. The surf remains strong through this period, and some tour operators offer low-season discounts on multi-activity combo packages.
Winter in Jaco, Costa Rica
December kicks off the dry season and the return of peak-season energy to Jaco. Rain chances plummet to just 5%, and by January they bottom out at 1%, making this one of the driest stretches you'll find anywhere in the tropics. Highs average 83.7°F (28.7°C) and lows stay comfortable at 64.8°F (18.2°C), with gentle trade-wind breezes keeping the coast from feeling oppressive. The sun sets around 5:20 PM in December, so plan your sunset cocktail at a beachfront spot like Villa Caletas accordingly.
This is Jaco at full volume. January is the single busiest month for tourism, and March and December are close behind. The bars and clubs along Pastor Diaz Avenue run late every night, and restaurants serving everything from fresh ceviche to sushi to craft beer fill up by early evening. New Year's Eve is a highlight, with fireworks over the beach and parties at nearly every venue in town. Sportfishing charters out of nearby Los Suenos Marina run at capacity, targeting sailfish, marlin, and mahi-mahi in the fertile Pacific waters offshore. Book excursions and transfers well in advance during this window.
Dry trails make this the ideal time for day trips to Carara National Park, where you can hike through the transitional forest between Costa Rica's dry north and tropical south, spotting sloths, capuchin monkeys, and flocks of scarlet macaws. The Crocodile Bridge over the Tarcoles River is an easy stop on the way. February's humidity drops to its lowest point of the year, around 50%, and the air feels noticeably lighter. Pack sunscreen with serious SPF, a wide-brimmed hat, and plenty of water for any outdoor adventure.
At a Glance
Monthly weather, visitor crowds, air quality, holidays, and daylight hours to help you plan your trip.
Travel Tips & Safety for Jaco, Costa Rica
Getting to Jaco from Juan Santamaria International Airport in San Jose takes about 90 minutes by car along Route 27, making it one of Costa Rica's most accessible beach towns. Most shops, restaurants, and hotels line Pastor Diaz Avenue, the main strip running parallel to the beach, so the town is easy to navigate on foot. If you want to explore nearby spots like Playa Hermosa, Carara National Park, or the Crocodile Bridge, you can hire a taxi, take a local bus, or prebook a private transfer; renting a car gives the most flexibility but driving in Costa Rica requires confidence on narrow, winding roads.
Jaco's ocean currents produce strong riptides, particularly at the north end of the beach, so swim with caution and never enter rough-looking water alone. The south end tends to be calmer and is where most surf schools operate. Keep valuables locked in your hotel safe rather than bringing them to the beach, and be aware of your surroundings when walking late at night away from the main strip.