Manuel Antonio Sea Temperature

Updated Sat 06:38 (America/Costa_Rica)

Costa Rica · Forecast updated Aug 8, 2026, 06:38 UTC

Current Sea Temperature

30.3°C

86.5°F

Very warm water

Versus this month's average

Close to average

The August average in our archive is 30.4°C (86.7°F).

Recent trend

Holding fairly steady

Seven-day average: 30.4°C, versus 30.5°C in the prior seven days.

What to wear

Very warm water

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

Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions.

Sea Surface Temperature Over the Year

In the data collected for Manuel Antonio, monthly averages range from about 30.0°C (85.9°F) in June to 30.4°C (86.7°F) in July.

Over the past 30 days, the average sea temperature in Manuel Antonio has been 30.4°C.

Month	Min	Average	Max
June	28.9°C / 84.0°F	30.0°C / 85.9°F	31.1°C / 88.0°F
July	29.5°C / 85.1°F	30.4°C / 86.7°F	31.3°C / 88.3°F
August	29.8°C / 85.6°F	30.4°C / 86.7°F	31.1°C / 88.0°F

Profile calculated from 1647 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.

National-park beaches with calm bays and reef close to shore.

The current sea surface temperature in Manuel Antonio is 30.3°C. Over the last 30 days, the average has been 30.4°C.

The warmest monthly average in the Manuel Antonio archive is July, at around 30.4°C (86.7°F).

The coldest monthly average in the archive is June, at around 30.0°C (85.9°F).

At 30.3°C, the water is usually comfortable for swimming and snorkeling.

See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Manuel Antonio.