Weather in Costa Rica:
A Month by Month Guide
Planning a trip to Costa Rica and wondering about the weather? With this handy guide, you'll discover what the weather is like for each month of the year across the country, with a particular focus on the stunning Osa Peninsula. Spoiler alert: No matter the weather, Costa Rica and its verdant Osa Peninsula are both well worth a visit!
Do not believe weather app predictions on the Osa. The peninsula creates it's own weather that is impossible to predict. All apps will predict rain every day here, but that is not accurate!
2023 has been the driest year on record with little to zero rain from December to June.
Costa Rica Weather in January
January is one of the driest months in Costa Rica, with average high temperatures ranging from 70-80°F. This is the perfect time for hiking, bird watching, horseback riding, snorkeling at Cano Island, kayaking, or simply lounging on the beach. On the Osa Peninsula, expect similar temperatures and clear skies - perfect for exploring Corcovado National Park or visiting Cano Island.
What to bring: Sunscreen, sunglasses, and a hat for the sunny days.
Upside of occasional rain: The landscape is green and lush from the previous rainy season.
Costa Rica Weather in February
February continues the dry season trend, with plenty of sunshine and minimal rain across Costa Rica. On the Osa Peninsula, you'll find the weather equally as pleasant, making it a great time for snorkeling and any activity.
What to bring: Swimsuit and beach accessories for those sun-soaked beach days.
Upside of occasional rain: There is a very miniscule chance of any rain during February.
Costa Rica Weather in March
In March, temperatures start to climb a bit, particularly in inland areas. Coastal areas, like the Osa Peninsula, remain comfortable with ocean breezes. This is a good time to visit waterfalls and cool off in the natural pools.
What to bring: A refillable water bottle to stay hydrated and a waterproof bag for those waterfall visits.
Upside of a possible rain: It would bring a welcome relief from the day's heat, but it is very unlikely to see rain during March.
Costa Rica Weather in April
April is still part of the dry season but expect occasional showers at night as the month progresses, signaling the upcoming green season. Any rain at night would be welcome to bring in a refreshing, cooler night. Temperatures in the Osa Peninsula remain pleasant, with the added bonus of fewer tourists. (excluding Semana Santa)
What to bring: Light rain jacket or poncho for those sporadic showers.
Upside of occasional rain: The chance of showers reduces crowd sizes, making popular spots more serene and personal. Even though it isn't likely to rain during the day in April.
Costa Rica Weather in May
May marks the beginning of the green season in Costa Rica. Although rain becomes more frequent, it typically falls in the afternoons and evenings, leaving your mornings free for activities. In the Osa Peninsula, expect the rainforest to burst into life with vibrant flora and fauna.
What to bring: Quick-dry clothing. Don't worry about waterproof footwear, we have rubber boots at the lodge.
Upside of occasional rain: The rain brings a renewed burst of life to the rainforest, making wildlife sightings even more spectacular.
Costa Rica Weather in June
June is often characterized by a tropical mix of sunny mornings and rainy afternoons. The Osa Peninsula follows a similar pattern, offering the opportunity to explore in the cool morning hours and relax during the afternoon showers. Although it doesn't rain every afternoon. You will still experience mostly sunny days.
What to bring: A good book or board games for cozy indoor afternoons.
Upside of occasional rain: Rainy afternoons provide a perfect excuse for a siesta or to unwind with a good book.
Costa Rica Weather in July
July experiences a brief respite from the rain known as the "Little Summer". On the Osa Peninsula, enjoy clear mornings for outdoor adventures like horseback riding or hiking. July 15th is the official start of Whale season! Keep an eye on the horizon as much as possible to spot the breaching mamas with their babies!
What to bring: Hiking boots and binoculars for wildlife spotting.
Upside of occasional rain: The clear air post-rain makes for fantastic photography opportunities.
Costa Rica Weather in August
August brings the return of the rains, but remember, showers are often in the afternoon, leaving the morning for activities. The Osa Peninsula is lush and green, and it's a wonderful time for bird watching and humpback whale watching!
What to bring: Waterproof camera or phone case to capture stunning wildlife photos.
Upside of occasional rain: Rainstorms often bring some of the most spectacular sunsets!
Costa Rica Weather in September
September is typically one of the wettest months. However, on the Osa Peninsula, the rain enhances the beauty of the rainforest, making it an ideal time for photographers and nature lovers. There are still mostly sunny or just cloudy mornings/ afternoons. Most of the rain on the Osa Peninsula happens at night.
What to bring: Rain gear and a sense of adventure!
Upside of occasional rain: The rainfall creates beautiful, full-flowing waterfalls.
Costa Rica Weather in October
In October, expect more of the rainy season, particularly in the early part of the month. The Osa Peninsula embraces the rain, with wildlife flourishing in the lush environment. Every year the rainy season varies. Some years it can be quite rainy, other years we have experienced quite a few days without it at all. Weather on the Osa Peninsula can change multiple times a day. It can even rain and be sunny at the same time!
What to bring: Mosquito repellent and a high-quality rain jacket.
Upside of occasional rain: It's the best time to see Costa Rica's magical phenomenon - the spawning of the sea turtles!
Costa Rica Weather in November
By November, the rainy season begins to wind down, with less frequent showers. On the Osa Peninsula, take advantage of the improving weather with boat tours or beach activities.
What to bring: Beachwear and sunscreen for those returning sunny days, as well as a light rain jacket for any unexpected rain.
Upside of occasional rain: Rainbows! After the rain, the sky often lights up with vibrant rainbows.
Costa Rica Weather in December
In December, Costa Rica enters the dry season once again. The Osa Peninsula, in particular, is a paradise, with warm sunny days and cool nights. This is an excellent time for any outdoor activities.
What to bring: Your adventure spirit and a camera to capture the beauty of Costa Rica.
Upside of occasional rain: The sporadic rain showers keep the landscape vibrant and green.
In conclusion, whether it's the dry season or the green season, Costa Rica, and especially the Osa Peninsula, offers something for everyone. And remember, without the rain, there would be no rainforest! So, embrace the weather, pack accordingly, and enjoy your Costa Rican adventure.