Month-specific sea-surface temperature · Costa Rica

Manuel Antonio Sea Temperature in April

30.7°C

87.3°F

In April, sea-surface temperature near Manuel Antonio has a historical monthly average of 30.7°C. This is not the reading for any particular holiday date.

Across 2023–2025, the lowest and highest yearly April monthly means were 30.5–30.8°C. These are not daily extremes.

Previous month

March · 30.5°C

Change into April: +0.2°C

Next month

May · 30.4°C

Change into next month: -0.3°C

Can you swim or snorkel in Manuel Antonio in April?

At 30.7°C our temperature-only guide describes the water as very warm water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.

Do you need a wetsuit?

Swimwear is usually enough; a rash guard adds sun protection.

Which beach should you choose?

Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.

Check the current waves, wind and snorkeling forecast →

A live forecast does not predict a future April. Check again close to your trip.

Nearby places in April

Comparable historical averages from independent marine grid cells. Warmer water does not imply safe snorkeling.

Data source and limitations

Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2023–2025. Marine model grid near 9.39, -84.15. Based on 3 yearly monthly means and 2160 recorded samples. Source methodology.

Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.