Costa Rica in February: Pacific or Caribbean Coast?
Compare Costa Rica weather in February, from dry and sunny Tamarindo to wetter Puerto Viejo, plus Jacó, Arenal and San José.
Ostional Weather in September
In Ostional, September brings high daytime temperatures around 29°C (84°F), with nights cooling to 25°C (77°F). This month falls within the rainy season, so expect frequent rainfall.
Rainfall in Ostional in September
Ostional is in the rainy season in September, with rain on around 23 days and an average of 417 mm (16 in). The rain this month falls heavily when it arrives. Late afternoons in particular can see strong showers, so waterproofs are worth keeping handy.
Temperature in Ostional in September
In September, expect high temperatures in Ostional, with highs of 29°C (84°F) and lows of 25°C (77°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights are warm at 25°C (77°F). It's worth making sure your accommodation has decent ventilation or air conditioning.September in Ostional has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Ostional Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
29°C (84°F)
Chance of Rain
77%
Precipitation
417 mm (16 in)
Rainy days
23 days
Ostional Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ostional - and find the best time to visit.
Best Places in Costa Rica in September
Find out more about the weather in Costa Rica and which places have the best travel conditions in this month. See all of Costa Rica in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Ostional in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can.
What To Do in Ostional in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Ostional 3-Day Forecast
More climate data for Ostional
See the full Ostional climate overview or explore weather in Costa Rica.
Popular in September
Where to go in September - average daytime high across popular destinations.
Tamarindo
30°C (86°F) Cahuita29°C (84°F) Santa Teresa29°C (84°F) Herradura28°C (82°F) Puerto Viejo de Talamanca29°C (84°F) Fortuna29°C (84°F) Jacó28°C (82°F) San José24°C (75°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Costa Rica in February: Pacific or Caribbean Coast?
Where the rain forest meets the ocean
I promise that you will not find a better location, better views, nicer rooms or lovelier staff anywhere in Costa Rica. This place really goes above and beyond.
Exploring Santa Teresa, Costa Rica: A Traveler's Guide
Immerse yourself in the laid-back charm of Santa Teresa, Costa Rica. Discover stunning beaches, vibrant dining spots, unique shops, and diverse activities in our comprehensive guide
Envision Festival
This event happens once a year in Uvita de Puntarenas and attracts people from all over the world. This festival is a must add to your bucket list.