Tamarindo in October asks for a different kind of trip. It is usually the wettest month of the year in Guanacaste, so you plan around the weather instead of ignoring it. In return, you get the quietest beaches of the year, mangroves at their fullest and two turtle seasons overlapping: the arribada peak at Ostional and the start of the leatherback season at Playa Grande.
Short answer: October is usually the rainiest month in Tamarindo and the quietest for tourism. Rain can fall for long periods, but many days still have dry hours, often in the morning. Estuary tours run all year with the high tide, the Ostional arribadas are at their peak and the leatherback season begins, although leatherback sightings are now rare. Choose October if you are flexible, and keep a buffer day for weather changes.
Tamarindo weather in October: the wettest month
In most years, October brings the most rain to the Pacific coast of Guanacaste. Compared with September, the showers last longer, the sky stays grey for more hours and storms are frequent.
There are still sunny spells, and some mornings are perfectly clear. But in October a whole day of steady rain is a real possibility, especially during a temporal.
Tropical storms in the Caribbean can also have an indirect effect: in some years they pull moisture across the country and bring several days of heavy rain to the Pacific side. Rural roads can become muddy or temporarily difficult, which mainly affects longer drives. For the full green season, see our guide to the Tamarindo rainy season.
Costa Rica in October: the quietest time of year
October has no national holiday that fills Tamarindo. Hotels are at their calmest, some businesses close for a few weeks or reduce their hours and the beaches can feel almost private.
This has one practical consequence for tours:
- Shared tours need a minimum of 2 people. If you travel with a partner or friends, that is never a problem.
- Solo travelers can still go out: the private kayak tour starts from 1 person, and we can tell you by WhatsApp which shared departures already have guests.
- Group tours to Ostional need 4 people, so it is worth contacting us early.
Tamarindo in October: two turtle seasons at once
Arribada peak at Ostional
October sits in the middle of the arribada peak, which usually runs from September to November. Thousands of olive ridleys can come ashore over several days, roughly once a month, but the turtles decide the start. We follow each arribada and confirm the departure by WhatsApp.
Leatherback season begins
In October the leatherback season starts at Playa Grande, inside Las Baulas Marine National Park. An honest note: the population has declined sharply, and seeing a leatherback is now rare. During the season, access to the nesting beach of the park is restricted to protect the species, so our night tour goes to Playa Minas or Playa Jesús. Read more in our guide to the turtle nesting tour at Playa Grande.
Baby turtle releases on our sunset tour are available from November 12.
What our guides see on the estuary in October
After weeks of rain, the river carries more fresh water and the channels run higher and browner. The mangroves are dense and the dry forest is so leafy that monkeys are often heard rather than seen.
October is a strong month for birds: northern migrants are present in good numbers, and shorebirds gather on the mudflats when the tide drops. Crocodiles are in the estuary as in every month. Under cloudy skies they tend to stay in the water, so our guides scan the surface for eyes and nostrils as the boat moves.
How rain and tides affect tours in October
- Boat and kayak tours leave with the high tide, which changes every day. We confirm the time by WhatsApp after you book and tell you if the forecast suggests a better day.
- Light rain does not stop the tour. With lightning, strong storms or unsafe water, we wait, offer another date or refund the deposit.
- Ostional depends on the arribada and on the road; the partly unpaved route can take longer after heavy rain.
- Night turtle tours leave at 5:30 pm. Rain on the beach is unpleasant but not dangerous; lightning is a reason to wait.
Before paddling, read our tips for a Tamarindo kayak tour.
A flexible plan for an October trip
- Book your key tour early in the trip, so there is time to move it if the weather turns.
- Leave one buffer day without plans in the middle of your stay.
- Check the tide times we send you and prefer the morning departures.
- Keep a rainy-afternoon plan: a long lunch, a rest before a night tour or a walk in town.
What to pack for Tamarindo in October
- A proper rain jacket and a small towel.
- Quick-dry clothes and water shoes that drain; leave heavy cotton at home.
- A waterproof phone case or zip-lock bags (a dry bag is included on kayak tours).
- A spare set of dry clothes for after the tour.
- Insect repellent, plus dark clothing for turtle tours.
Things to do in Tamarindo in October: best tours
- Tamarindo boat tour (shared): $40 per person, 2 hours, minimum 2 people, pickup from Tamarindo or Langosta included. Deposit $15 per person.
- Ostional arribada tour: $130 per person, minimum 4 people, children 3 and under free, with transportation, a bilingual guide, water and seasonal fruit.
- Tamarindo turtle tour: $60 per person, minimum 2 people, pickup in Tamarindo at 5:30 pm. If we do not see turtles, we reschedule for the next night or make it up to you with the estuary tour.
- Private kayak mangrove tour in Tamarindo: $100 per person, from 1 person, about 2.5 hours, with your own bilingual guide, coconut water and transportation in the Tamarindo area. Deposit $20 per person.
Still deciding? Compare with Tamarindo in September or Tamarindo in November, when the rain starts to ease.
If you are coming in October, Tamarindo Estuary Tours Mi Rey will help you choose the best tide and the best day. Book online with the deposit and pay the balance on the tour day, or write to us on WhatsApp with your dates.
Book these tours
Shared Boat Tour (Mangrove Safari)$40 per personSee tour and book →
Ostional Arribada Tour$130 per personSee tour and book →
Turtle Nesting Tour$60 per personSee tour and book →
Private Kayak Tour$100 per personSee tour and book →
Frequently asked questions
Is October a good time to visit Tamarindo?
It is a good time for flexible travelers who want empty beaches, a green landscape and turtles. October is usually the rainiest month in Guanacaste, so plan outdoor activities around the dry hours and keep a buffer day.
Do boat tours run in Tamarindo in October?
Yes. Estuary boat and kayak tours run all year with the high tide, and light rain does not usually stop them. If the weather or water conditions make a tour unsafe, we offer you another date or a refund of the deposit.
Can I see leatherback turtles in October?
The leatherback season at Playa Grande begins in October, but sightings are now rare because the population has declined sharply. Our night nesting tour goes to Playa Minas or Playa Jesús, where olive ridley and black turtles are seen most often.
I am traveling alone in October. Can I still book a tour?
Yes. Shared tours need a minimum of 2 people, which can be harder to reach in the quietest month, but the private kayak tour starts from 1 person at $100 per person. Write to us on WhatsApp and we will tell you which shared departures already have guests.
Is the Ostional arribada tour possible in October?
Yes, October is within the peak of the arribadas, which usually runs from September to November. The date of each arribada depends on the turtles, and the road can be slower after heavy rain, so we confirm the plan by WhatsApp.
More Tamarindo guides
Tamarindo month by monthTamarindo in January: Weather, Crowds, Turtles and ToursTamarindo in January: dry, sunny and windy weather, peak season crowds, nesting turtles, how the tide sets the estuary tour and what to pack.
Tamarindo month by monthTamarindo in February: Dry Skies, Clear Nights and the Best ToursTamarindo in February: one of the driest months, fewer local crowds once schools reopen, turtles, monkeys in the bare dry forest and the tours that fit best.
Tamarindo month by monthTamarindo in March: Heat, Easter Week Crowds and the Best ToursTamarindo in March: hot and very dry, Easter week (Semana Santa) and spring break crowds, nesting iguanas and crocodiles, tides and the best tours to book.
Tamarindo month by monthTamarindo in April: The Hottest Month, Quieter Beaches and Smart ToursTamarindo in April: the hottest end of the dry season, quieter weeks after Easter, first rains, wildlife in the bare forest and tours timed to beat the heat.
Tamarindo month by monthTamarindo in May: First Rains, Green Hills and the Start of Turtle SeasonTamarindo in May: the first rains turn the dry forest green, low season brings quiet tours, olive ridley nesting increases and small Ostional arribadas begin.
Tamarindo month by monthTamarindo in June: Green Season, Fuller Waterfalls and Turtle NightsTamarindo in June: bright mornings and afternoon storms, a lush green estuary, waterfalls filling up, olive ridley nesting and quiet tours before July.