Rarotonga Sea Temperature

Updated Sat 21:05 (Pacific/Rarotonga)

Cook Islands · Forecast updated Aug 8, 2026, 21:05 UTC

Current Sea Temperature

22.8°C

73.0°F

Mild water

Versus this month's average

0.4°C below

The August average in our archive is 23.2°C (73.8°F).

Recent trend

Cooling by 0.3°C

Seven-day average: 23.4°C, versus 23.7°C in the prior seven days.

What to wear

Mild water

A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.

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 Rarotonga, monthly averages range from about 23.2°C (73.8°F) in August to 24.9°C (76.8°F) in June.

Over the past 30 days, the average sea temperature in Rarotonga has been 23.7°C.

Month	Min	Average	Max
June	24.3°C / 75.7°F	24.9°C / 76.8°F	25.4°C / 77.7°F
July	23.4°C / 74.1°F	24.0°C / 75.2°F	24.9°C / 76.8°F
August	22.8°C / 73.0°F	23.2°C / 73.8°F	23.9°C / 75.0°F

Profile calculated from 1662 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.

Island ringed by a shallow lagoon with marine reserves snorkelable from the beach.

The current sea surface temperature in Rarotonga is 22.8°C. Over the last 30 days, the average has been 23.7°C.

The warmest monthly average in the Rarotonga archive is June, at around 24.9°C (76.8°F).

The coldest monthly average in the archive is August, at around 23.2°C (73.8°F).

At 22.8°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 Rarotonga.