Ostional Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Ostional.
Climate overview of Ostional
Ostional, Guanacaste, Costa Rica, has a stable climate with little temperature variation across the year. Average daytime temperatures hover around 30°C (86°F), peaking in March at 32°C (90°F) and dipping in October to 29°C (84°F).
Rainfall is high, totalling around 2516 mm (99 in) per year. October is the wettest month and February the driest. The city also experiences distinct dry (December to March) and wet (May to November) seasons.
Ostional Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ostional - and find the best time to visit.
Monthly Temperature in Ostional
With minimal seasonal shifts, Ostional experiences a constant climate year-round. Average maximum daytime temperatures range from a very warm 32°C (90°F) in March, the warmest time of the year, to a comfortable 29°C (84°F) during cooler months like October.
At night, you can expect temperatures ranging from 26°C (79°F) in March to around 24°C (75°F) during October.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Ostional
Ostional has a notably wet climate with abundant precipitation, recording 2516 mm (99 in) of rainfall per year. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, October it receives heavy rainfall, averaging 448 mm (18 in) of precipitation, recorded across 21 rainy days. In contrast, the driest month February brings less rainfall, with 8.3 mm (0.3 in) over 6 rainy days. For more details, please visit our Ostional Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Ostional
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February and March
- Warmest weather: January, February, March and April
- Fewest rainy days: February and March
- Wettest months: May, June, July, August, September and October, when rainfall is highest.
- Seasonal pattern: Distinct dry (December to March) and wet (May to November) seasons
Frequently asked questions about the climate in Ostional
What is the best time to visit Ostional?
January, February and March typically offer the most optimal weather in Ostional. In contrast, May, June, July, August, September and October tend to have less optimal conditions. Ostional has distinct dry (December to March) and wet (May to November) seasons.
What temperatures can I expect in Ostional?
Daytime highs range from 29°C (84°F) in October to 32°C (90°F) in March. Nighttime lows range from 24°C (75°F) to 26°C (79°F). Temperatures stay relatively stable year-round.
How much rain does Ostional get?
Annual rainfall is around 2516 mm (99 in). October is the wettest month with 448 mm (18 in), while February is the driest with 8.3 mm (0.3 in).
Ostional 3-Day Forecast
Ostional on the map
Ostional is highlighted - select any city to see its climate.
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