British Indian Ocean Territory weather

Get the latest coronavirus (COVID-19) updates for the British Indian Ocean Territory with current travel advice, statistics and online resources.

Usually in September
- 29
- 24
Weather by month
Now Today
- 29
- 5
5-day forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The weather guide for British Indian Ocean Territory shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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Which is the hottest month in the British Indian Ocean Territory?

The hottest time of year in Diego Garcia, British Indian Ocean Territory is normally April. Expect maximum daytime temperatures to reach 31°C with very high heat and humidity.

Which month has the most rain in the British Indian Ocean Territory?

In terms of rainfall, January is usually the wettest month in Diego Garcia, British Indian Ocean Territory with 291mm on average. There are normally 16 days in January with some rain.

When is the sea warmest in the British Indian Ocean Territory?

The sea is usually at its warmest in Diego Garcia, British Indian Ocean Territory in April when the water temperature reaches 29°C.

Metric (°C / mm) | Imperial (°F / inches)

Compare British Indian Ocean Territory weather with the USA

Below the British Indian Ocean Territory weather chart shows average maximum daytime temperature for British Indian Ocean Territory (Diego Garcia) and the USA (Washington).

Maximum daytime temperature (°C)

British Indian Ocean Territory (Diego Garcia)

USA (Washington)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Metric (°C / mm) | Imperial (°F / inches)

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Destination

Tropical storm risk: British Indian Ocean Territory cyclone season

% of month affected by tropical storms

1.3%

<1%

1.5%

2.1%

1.5%

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

The British Indian Ocean Territory tropical storm risk chart above shows the cyclone season for Diego Garcia, British Indian Ocean Territory. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.

More about tropical storms