What to expect in Costa Rica in August
August is a mixed month in Costa Rica. You get 29° / 21°, but manageable crowds at the big attractions. Worth it for the right traveller.
Costa Rica weather in August
Typical conditions in Costa Rica during August, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 29°C 84°F |
|---|---|
| Average low | 21°C 70°F |
| Rainfall | Wet 55/100 |
| Total rainfall | 252 mm9.9 in |
| Sea temperature | 29°C 84°F |
| Daylight | 12 h 27 min |
| How it feels | Warm and comfortable |
Rainfall figures are for San José.
Average highs sit around 29°C with lows near 21°C. Rainfall is moderate; the odd shower is likely.
Crowds & demand
Crowd levels are Low for Costa Rica — plenty of space at the main sights.
Prices & value
This month counts as low season: some of the best deals of the year.
What to pack
Light layers for 29°C days and something with sleeves for evenings, which cool to around 21°C. Add a compact rain shell and shoes you do not mind soaking; this is one of the wetter months.
What it costs
This is one of the cheaper months to visit Costa Rica. Flights and accommodation sit near their yearly floor, and you can usually book late without being punished for it. Compared with the most expensive month of the year, you are looking at roughly 50% less.
Who this month suits
- Anyone travelling on a budget
- People who would rather have space than perfect conditions
- Visitors who want to catch a festival
Events & what’s on
Look out for Sea Turtle Nesting Season while you’re there.
- Sea Turtle Nesting Season — Olive ridley turtles arrive in mass arribadas to nest at Ostional beach.
Costa Rica in August compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| June | 30° / 21° | Low | $ | 63 |
| July | 29° / 21° | Moderate | $ | 64 |
| August · This month | 29° / 21° | Low | $ | 64 |
| September | 28° / 21° | Low | $ | 67 |
| October | 28° / 21° | Low | $ | 66 |
These months score higher for Costa Rica on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in August
If the destination is negotiable but the month is not, these places are at their best in August.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
