September in Costa Rica: The Green Season’s Hidden Treasure

September in Costa Rica is not your typical travel month—and that’s exactly why it's so special. While this time of year falls deep within the green (rainy) season, it’s a secret favorite for nature lovers, budget-conscious travelers, and anyone seeking a more peaceful, authentic experience. With emerald landscapes, dramatic skies, and fewer tourists, Costa Rica in September offers a uniquely lush and intimate adventure.

At ROAM, we know that September is perfect for the right kind of traveler: those who don’t mind a little rain in exchange for unforgettable scenery, excellent wildlife viewing, and great value. If that’s you, read on—your tropical escape is just around the corner.

🌴 Why Visit Costa Rica in September?

Don’t let the word "rainy" scare you off—September can be surprisingly beautiful. Mornings often start with sunshine, giving way to brief afternoon downpours that cool the air and refresh the jungle. And with fewer crowds, you’ll feel like you have paradise all to yourself.

Top reasons to visit in September:

  • 🌿 Unbelievably lush, green scenery

  • 🧘 Quiet beaches and serene jungle trails

  • 💸 Deep off-season travel deals on hotels and tours

  • 🐢 Peak turtle nesting season on the Pacific coast

  • 📷 Perfect lighting and misty forests for photography

  • 🦜 Fantastic birdwatching and wildlife encounters

🌦️ What’s the Weather Like in September?

September is one of the rainiest months on Costa Rica’s Pacific side, but the Caribbean coast tells a different story, often experiencing one of its driest periods of the year. Here’s a breakdown by region:

🌴 Pacific Coast (Guanacaste, Nicoya Peninsula, Central Pacific):
Expect regular afternoon and evening showers, but with plenty of bright, dry mornings. Temperatures stay warm, between 80–88°F (27–31°C). Surfing, yoga retreats, and wildlife tours continue with fewer people and lower prices.

🌺 Caribbean Coast (Puerto Viejo, Cahuita, Tortuguero):
This is prime time to visit the Caribbean side. September is unexpectedly dry here, with sunshine, calm seas, and temps around 75–85°F (24–29°C). It’s ideal for beach days, snorkeling, and turtle nesting tours.

🌋 Central Valley (San José, Cartago, Heredia):
Mild and fresh with temperatures between 65–77°F (18–25°C). Expect cloudy skies and rain in the afternoons. Great for exploring museums, coffee farms, and local culture.

🌲 Northern Zone (Arenal, La Fortuna, Monteverde):
Cooler mountain climates with frequent mists and showers. Highs range from 60–75°F (16–24°C). The forests are alive with birds, frogs, and adventure.

🎒 What to Pack

  • Waterproof jacket or poncho

  • Quick-dry clothes and shoes

  • Lightweight long-sleeve shirts for jungle treks

  • Swimsuits and sandals for hot springs and beaches

  • Insect repellent and reef-safe sunscreen

  • Dry bags for electronics and documents

  • A light sweater for cooler mountain evenings

🐾 What to Do in September

Rainy season doesn’t mean you’ll be stuck inside. In fact, many of Costa Rica’s best experiences shine even brighter during this lush time:

  • 🐢 Witness turtle nesting in Ostional or Tortuguero

  • 🌋 Soak in volcanic hot springs near Arenal

  • 🚣 Canoe or kayak through Tortuguero’s canals

  • 🦥 Hike rainforest trails in Corcovado or Monteverde

  • 🏄 Surf Pacific waves with fewer crowds

  • 📷 Capture dramatic landscapes and moody skies

September is also a great month for eco-lodges and wellness retreats, where cozy rainforest views and spa treatments replace the hustle of touristy hotspots.

🎉 Cultural Highlights in September

  • Día de la Independencia (September 15):
    Costa Rica’s Independence Day is a colorful celebration full of parades, traditional dances, school performances, and patriotic pride. Towns across the country come alive with cultural events—it's a wonderful way to connect with local life.

  • Local Ferias & Festivals:
    Rural towns may host small harvest fairs and community gatherings—perfect for trying local food and supporting artisans.

✅ Insider Travel Tips

  • ☀️ Plan tours and activities early in the day to avoid afternoon rains.

  • 🐢 Book turtle-watching tours ahead of time—they sell out quickly.

  • 🚗 Consider a 4x4 rental if exploring off-the-beaten-path areas.

  • 💰 Take advantage of low-season rates—this is a budget traveler’s dream.

  • 🧘 Use the slower pace to unwind—this is Costa Rica at its most peaceful.

✈️ Discover a Greener Side of Paradise This September

Costa Rica in September is a hidden gem for those who embrace the unexpected. The rain brings the country to life—rivers swell, forests sing, and animals emerge. Whether you’re looking for romance, relaxation, or raw nature, this is the month to see the real Costa Rica—unfiltered and unforgettable.

Let ROAM help you plan a September trip full of heart, soul, and lush discovery. We’ll design a custom itinerary that balances adventure with serenity, rain with sunshine, and value with experience.

📞 Reach out today to start crafting your green season getaway.
🌴 Paradise is calling—and it’s greener than ever.