West Island
Cocos (Keeling) Islands
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
West Island, Cocos (Keeling) Islands

Scenic view of palm trees along the white sandy beaches on the Indian Ocean, on the Coast of West Island, Cocos (Keeling) Islands
Scenic view of palm trees along the white sandy beaches on the Indian Ocean, on the Coast of West Island, Cocos (Keeling) Islands
September, the first month of the spring, in West Island, is also a moderately hot month, with average temperature fluctuating between 28°C (82.4°F) and 23°C (73.4°F).

Temperature

June through September, with an average high-temperature of 28°C (82.4°F), are the coldest months.

Rainfall

In West Island, it is raining for 14 days, with typically 105mm (4.1") of accumulated precipitation. Throughout the year, there are 186 rainfall days, and 2082mm (82") of precipitation is accumulated.

Sea temperature

July through December, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater.
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In September, the average length of the day in West Island is 12h.

Sunshine

The average sunshine in September is 14h.

UV index

January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 12 interpret into the following advice:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the coldest month in West Island?

June through September, with an average high-temperature of 28°C (82.4°F), are the coldest months.

What is the temperature in September in West Island?

The average high-temperature, in September, in West Island, is 28°C (82.4°F), while the average low-temperature is 23°C (73.4°F).

How much does it rain in West Island in September?

In West Island, in September, during 14 rainfall days, 105mm (4.1") of precipitation is typically accumulated.

When is the sea coldest in West Island?

July through December, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater in West Island.

What is the water temperature in September in West Island?

In September, the average sea temperature in West Island, Cocos (Keeling) Islands, is 27°C (80.6°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in September in West Island?

The average length of the day in September in West Island, Cocos (Keeling) Islands, is 12h.

How many hours of sunshine does West Island have in September?

In September, the average sunshine in West Island is 14h.

When is the highest UV index in West Island?

January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index in West Island, Cocos (Keeling) Islands.

What is the UV index intensity in September in West Island?

In September, the average daily maximum UV index is 12. A UV Index of 11, and more, symbolizes an ultimate hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - West Island, Cocos (Keeling) Islands
  • Average high temperature in September: 28°C

Warmest months (with the highest average high temperature) are February, March and April (30°C).
Months with the lowest average high temperature are June, July, August and September (28°C).

  • Average low temperature in September: 23°C

Months with the highest average low temperature are March and April (25°C).
Coldest months (with the lowest average low temperature) are July, August and September (23°C).

Average rainfall in September - West Island, Cocos (Keeling) Islands
  • Average rainfall in September: 105mm

The wettest month (with the highest rainfall) is April (255mm).
The driest month (with the lowest rainfall) is October (99mm).

Average rainfall days in September - West Island, Cocos (Keeling) Islands
  • Average rainfall days in September: 14 days

Months with the highest number of rainy days are May and July (20 days).
The month with the lowest number of rainy days is December (11 days).

Average sea temperature in September - West Island, Cocos (Keeling) Islands
  • Average sea temperature in September: 27°C

Best months for swimming (with the highest average sea temperature) are January, February, March, April, May and June (28°C).
Coldest months (with the lowest average sea temperature) are July, August, September, October, November and December (27°C).

Average daylight in September / Average sunshine in September - West Island, Cocos (Keeling) Islands
  • Average daylight in September: 12h

The month with the longest days is December (Average daylight: 12.8h).
The month with shortest days is June (Average daylight: 11.4h).

  • Average sunshine in September: 14h

Months with most sunshine are May and July (Average sunshine: 20h).
The month with least sunshine is December (Average sunshine: 11h).

Average UV index in September - West Island, Cocos (Keeling) Islands
  • Average UV index in September: 12

Months with the highest UV index are January, February, March, April, September, October, November and December (UV index 12).
The month with the lowest UV index is June (UV index 8).