San Carlos & Northern Costa Rica Guide (2026)

• La Fortuna / Arenal (500 m): 22–28 °C, humid year-round • Boca Tapada lowlands (50 m): 26–32 °C, very humid • Caño Negro wetlands: 26–32 °C, seasonal flooding • Annual rainfall: 3,000–4,500 mm • Driest months: February–April (clearest volcano views) • Wettest months: September–November • Microclimate: it can be raining at the volcano while sunny in town 5 km away

• **Arenal 1968 Volcano Trail:** lava field hike with panoramic views • **Mistico Hanging Bridges:** primary rainforest canopy walk • **La Fortuna Waterfall:** 70 m cascade + swim hole • **Hot springs (Baldi, Tabacón, Los Lagos, Ecotermales):** volcanic-heated water • **Bogarin Trail:** sloths and 200+ bird species • **Caño Negro Wildlife Refuge:** boat safari with caimans, monkeys, herons • **Boca Tapada:** great green macaws, lowland rainforest • **Río Celeste & Tenorio Volcano:** turquoise waterfall (1.5 hr away)

• Quick-dry hiking clothes • Lightweight rain jacket — rain comes daily • Closed hiking shoes with grip (trails get muddy) • Swimsuit + flip-flops for hot springs • Insect repellent (especially Boca Tapada and Caño Negro) • Binoculars for wildlife • Headlamp for night walks • Dry bag for cameras • Reusable water bottle • Light jacket for evenings near the volcano

• **February–April:** driest, best volcano views, peak prices • **May–August:** green and lush, afternoon showers, wildlife very active • **September–November:** wettest, but waterfalls at peak flow • **December–January:** popular but variable weather

• San José → La Fortuna: 3 hours (private transfer recommended) • Liberia → La Fortuna: 2.5 hours • La Fortuna → Monteverde: 3 hours via Lake Arenal taxi-boat-taxi or 4 hours by road • La Fortuna → Boca Tapada: 2 hours (4WD recommended)

For travelers based in La Fortuna, a guided night walk at Ecocentro Danaus is an easy way to see a side of the rainforest most visitors miss entirely. Red-eyed tree frogs, sleeping birds, tarantulas, and other nocturnal residents are far more active — and easier to spot with a trained guide — after dark than during the day.

North of La Fortuna toward the Nicaraguan border, the lowland rainforest around Boca Tapada supports species that never appear in the Arenal highlands, including the critically endangered great green macaw. A full-day expedition is the realistic way to reach this remote habitat and make the most of the drive.

A gentle float down the Peñas Blancas River offers a low-effort way to see wildlife up close, with monkeys, iguanas, caimans and herons regularly spotted along the banks. No paddling or hiking experience is needed, making it a good option for families or travelers looking for a relaxed morning outdoors.