British Indian Ocean Territory weather in August 2025

Q: How hot is it in the British Indian Ocean Territory in August?

Daytime temperatures usually reach 29°C in Diego Garcia, British Indian Ocean Territory in August with moderate heat and humidity, falling to 24°C at night.

Q: How warm is the sea around the British Indian Ocean Territory in August?

The average sea temperature around Diego Garcia, British Indian Ocean Territory in August is 26°C.

Q: Does it rain in the British Indian Ocean Territory in August?

There are usually 14 days with some rain in Diego Garcia, British Indian Ocean Territory in August and the average monthly rainfall is 152mm.

Expect 84°F daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in British Indian Ocean Territory in August. Check more long-term weather averages for British Indian Ocean Territory in August before you book your next holiday to British Indian Ocean Territory in 2025/2026.

84
84°F max day temperature
14
14 days with some rainfall
75
75°F min night temperature
12
12 hours of daylight per day
M
Moderate heat & humidity
6.0
6.0 inches of monthly rainfall
11
11+ (Extreme) UV index
79
79°F sea temperature

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The August weather guide for British Indian Ocean Territory, represented by Diego Garcia, (Diego Garcia) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

How hot is it in the British Indian Ocean Territory in August?

Daytime temperatures usually reach 84°F in Diego Garcia, British Indian Ocean Territory in August with moderate heat and humidity, falling to 75°F at night.

How warm is the sea around the British Indian Ocean Territory in August?

The average sea temperature around Diego Garcia, British Indian Ocean Territory in August is 79°F.

Does it rain in the British Indian Ocean Territory in August?

There are usually 14 days with some rain in Diego Garcia, British Indian Ocean Territory in August and the average monthly rainfall is 6.0 inches.

British Indian Ocean Territory August sunrise & sunset times

Browse the sunrise and sunset times for British Indian Ocean Territory in August 2025. Select a month to view British Indian Ocean Territory sunrise and sunset times for the next 12 months. The British Indian Ocean Territory sunrise and sunset times shown below are for Diego Garcia.

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

Date	Sunrise times	Sunset times
Friday, 1st August 2025	07:23	19:11
Saturday, 16th August 2025	07:18	19:11
Sunday, 31st August 2025	07:12	19:10

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British Indian Ocean Territory - quick facts
Time difference	UK +6 hours
Language(s)	English
Currency	Pound Sterling, US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Tourist info	British Indian Ocean Territory Administration