West Island (Keeling Islands) weather in December
December in West Island: hot, soaked, with clean air — fine if you can take 13 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#7 of 12 months in West Island · #506 of 1413 destinations to visit in December · comfort 79/100 (tier B)
- Days
- 30°C
- Nights
- 25°C
- Wet days
- 13
- Sun
- 10.8 h
- Humidity
- 79%
- Daylight
- 13 h
Traveller notes on West Island in December
Other months in West Island
Cocos (Keeling) Islands forum posters describe the climate as close to a permanent 28C, with a near-constant wind except during the 'doldrums' stretch from December into January or February, when the air goes hot and still. Locals specifically steer visitors away from that doldrums window and toward the rest of the year instead, which puts April - well clear of the doldrums but still ahead of the widely recommended July-through-October peak - in solid shape for steady breeze and the island's usual warm, settled conditions.
Forum posters describe October in the Cocos (Keeling) Islands as genuinely beautiful, with temperatures holding constant in the 23-31C range, alongside increased humidity but less wind than the windier winter months. Posters describe a clear seasonal pattern here: November through March runs balmy with just slight breezes, July through September brings the strongest winds (prime kite and wind-surfing season), and October sits as the standout transition month with the calmer, most pleasant conditions of the year. Posters generally rate the islands as a year-round paradise regardless of season, but consistently single out October specifically for combining warm, settled weather with a welcome break from the stronger winds of the preceding months.
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West Island climate normals — December
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in West Island in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 5 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for West Island's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherWest Island's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in West Island in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Cyclone season
1 Nov – 30 Apr · usuallyCyclones in this part of the Indian Ocean are likeliest in the early months of the year. Direct hits on the atoll are rare, but a system passing nearby still grounds the flight and stirs up the lagoon crossing between the two inhabited islands. Source ↗
- Nature
Reef fish spawning season
1 Dec – 28 Feb · usuallyWildlife seasonThe islands' one dive operator times trips to the reef's summer breeding activity: giant triggerfish nesting at Canyons and bump-head parrotfish gathering to spawn at Cologne Gardens, both easiest to see across December to February. Source ↗
Where is West Island?
West Island in December — FAQ
- Is December a good time to visit West Island?
- December in West Island: hot, soaked, with clean air — fine if you can take 13 rainy days. It ranks #7 of 12 months for West Island on SeasonMap's comfort score (79/100).
- What is the weather like in West Island in December?
- In December, West Island averages a daily high of 29.7°C and a low of 24.9°C, with about 158.5 mm of rain over roughly 12.9 rainy days.
- What is the air quality in West Island in December?
- West Island has a mean US Air Quality Index of about 42 in December.