British Indian Ocean Territory weather in October 2025

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

Daytime temperatures usually reach 29°C in Diego Garcia, British Indian Ocean Territory in October with high heat and humidity, falling to 25°C at night.

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

The average sea temperature around Diego Garcia, British Indian Ocean Territory in October is 28°C.

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

There are usually 18 days with some rain in Diego Garcia, British Indian Ocean Territory in October and the average monthly rainfall is 245mm.

Q: What is the chance of a cyclone in the British Indian Ocean Territory in October?

On average less than 1 day in October in Diego Garcia, British Indian Ocean Territory is likely to be affected by the passage of one or more tropical storms.

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

84
84°F max day temperature
18
18 days with some rainfall
77
77°F min night temperature
12
12 hours of daylight per day
H
High heat & humidity
9.6
9.6 inches of monthly rainfall
11
11+ (Extreme) UV index
82
82°F sea temperature

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The October 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 October?

Daytime temperatures usually reach 84°F in Diego Garcia, British Indian Ocean Territory in October with high heat and humidity, falling to 77°F at night.

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

The average sea temperature around Diego Garcia, British Indian Ocean Territory in October is 82°F.

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

There are usually 18 days with some rain in Diego Garcia, British Indian Ocean Territory in October and the average monthly rainfall is 9.6 inches.

What is the chance of a cyclone in the British Indian Ocean Territory in October?

On average less than 1 day in October in Diego Garcia, British Indian Ocean Territory is likely to be affected by the passage of one or more tropical storms.

British Indian Ocean Territory October sunrise & sunset times

Browse the sunrise and sunset times for British Indian Ocean Territory in October 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
Wednesday, 1st October 2025	06:55	19:05
Thursday, 16th October 2025	06:48	19:04
Friday, 31st October 2025	06:43	19:05

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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