Cocos (Keeling) Islands – Water Temperature Overview

The Cocos (Keeling) Islands are surrounded by warm Indian Ocean waters and shallow lagoons. Water temperature remains consistently warm, supporting swimming and lagoon activities year-round.

Current Sea Water Temperature

28.7°C

minimum

28.8°C

average

29.0°C

maximum

The average sea water temperature today in Cocos (Keeling) Islands is about 29°C. Water at this temperature is very warm and feels almost tropical. Swimming is comfortable for most people, even for long periods, with no sensation of cold. These conditions are ideal for relaxed swimming, floating, and water play, especially for families and casual swimmers. However, during very hot weather, the water may feel less refreshing, and short breaks are often welcome.

It’s important to note that these swimming tips and recommendations apply only in settled weather. When air temperatures drop below 20°C — and sometimes even below 25°C — swimming can feel uncomfortable, even when water temperatures are relatively high.

Sea Temperature Trends

Water Temperature Over the Last 60 Days

The sea water temperature is within the range expected based on historical data for this month.

Water Temperature and Swimming Conditions by Month

Month	Min	Avg	Max
January	27°C	29°C	30°C
February	26°C	29°C	31°C
March	27°C	29°C	31°C
April	27°C	29°C	31°C
May	27°C	29°C	31°C
June	26°C	28°C	30°C
July	25°C	27°C	29°C
August	25°C	27°C	28°C
September	24°C	26°C	28°C
October	24°C	27°C	29°C
November	25°C	28°C	30°C
December	24°C	27°C	30°C

The Cocos (Keeling) Islands sit in the tropical Indian Ocean and are surrounded by consistently warm sea water all year round. Sea temperatures typically range from about 26–27 °C in the cooler months to around 28–29 °C in the warmer part of the year. Seasonal variation is minimal, and the water rarely feels cool, even during winter. These stable temperatures create comfortable conditions for swimming at almost any time, with the sea maintaining a pleasant warmth from morning through to evening.

Swimming Conditions

Swimming opportunities around the islands are largely shaped by lagoon and reef conditions rather than water temperature. Inside the lagoon, calm and shallow water often feels slightly warmer than the open ocean, making it especially inviting for relaxed swimming. During periods of light wind, sea temperatures combined with clear water create ideal conditions for extended time in the water. Even when weather conditions change, the warm sea remains comfortable. Overall, the Cocos (Keeling) Islands offer some of Australia’s most consistently warm and swim-friendly sea temperatures throughout the year.