Weather in Puntarenas in August

A hard month. August asks something of you. Go in knowing what. You should expect rain on 23 days of the month, which is more days wet than dry.

August ranks 11 of 12 — near the bottom of Puntarenas's year. December is the month that works, and the swing between the two is 30 points, which is a different holiday rather than a slightly better one.

Rain on 23 of the month's 31 days, 6 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 82% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 21 days top 30 °C, making the heat continuous rather than occasional; the day barely swings — 4.9 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 34.4 °C and the coldest night fell to 24.3 °C, and the wettest single day dropped 65 mm — roughly 35% of the month's rain in one day.

August is moderately variable: 66 mm in the driest year against 411 mm in the wettest, around an average of 186 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 6.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 82%, high enough to notice on the warm days without dominating them.

How August sits in the year

Temperatures hold steady either side: 30.8 °C in July, 30.8 here, 30 in September. Nothing about the timing within the month matters much.

Daylight in August

Puntarenas sits close enough to the equator that daylight barely moves all year — 12.5 hours in August, against a range of just 1.2 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 28.6 °C in August — warm enough that the water offers no relief from the heat. The sea peaks at 29.5 °C in April and bottoms out at 27.7 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Puntarenas versus nearby

If Puntarenas is one option among several, the nearby comparison is worth making. San José is a better bet in August — 6.9 °C cooler, 1 day more rain. Liberia is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: August is a compromise. December is 24 points better and is what Puntarenas is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Puntarenas

See all twelve months in Puntarenas, or where else to go in August.