West Island climate
West Island (Cocos Islands) has a tropical savanna (dry winter) climate (Köppen Aw). The average temperature over the year is 27 °C80 °F, and about 1,252 mm49 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
West Island climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2781 | 2780 | 2781 | 1164.6 |
| Feb | 2882 | 2781 | 2882 | 1445.7 |
| Mar | 2882 | 2781 | 2882 | 1937.6 |
| Apr | 2883 | 2882 | 2882 | 1867.3 |
| May | 2882 | 2781 | 2882 | 1094.3 |
| Jun | 2781 | 2780 | 2781 | 1174.6 |
| Jul | 2780 | 2679 | 2780 | 913.6 |
| Aug | 2679 | 2678 | 2679 | 411.6 |
| Sep | 2679 | 2678 | 2678 | 461.8 |
| Oct | 2679 | 2678 | 2679 | 411.6 |
| Nov | 2780 | 2679 | 2679 | 652.6 |
| Dec | 2780 | 2679 | 2780 | 1024.0 |
| Year | 2883 | 2678 | 2780 | 1,25249 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 79% | 64% | 6.6 | 12:46 |
| Feb | 80% | 65% | 6.4 | 12:30 |
| Mar | 80% | 71% | 5.9 | 12:12 |
| Apr | 81% | 71% | 5.2 | 11:51 |
| May | 80% | 68% | 4.6 | 11:34 |
| Jun | 80% | 70% | 4.2 | 11:25 |
| Jul | 79% | 70% | 4.4 | 11:28 |
| Aug | 78% | 66% | 5.1 | 11:43 |
| Sep | 78% | 67% | 5.8 | 12:03 |
| Oct | 78% | 61% | 6.4 | 12:24 |
| Nov | 79% | 67% | 6.5 | 12:42 |
| Dec | 80% | 68% | 6.6 | 12:50 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of West Island is like
The warmest month is April, with an average high of 28 °C83 °F and a low of 28 °C82 °F. The coldest is September, when highs average 26 °C79 °F and lows 26 °C78 °F. Temperatures barely change through the year: the warmest and the coolest month differ by only 2.1 °C3.7 °F.
It is wet, with about 1,252 mm49 in of precipitation per year. The wettest three-month stretch is February–April, which brings 42% of the annual total. The wettest month is March (193 mm7.6 in), the driest is August (41 mm1.6 in).
Relative humidity ranges from 78% in September to 81% in April. The clearest skies (lowest average cloud amount, 61%) are typical of October. Average wind speed near the ground ranges from 16 km/h (10 mph) in February to 26 km/h (16 mph) in July. Daylight lasts from about 11.4 hours in June to 12.8 hours in December.
Best time to visit West Island
Based on these averages, the most comfortable months for sightseeing and outdoor activities are August–November: average highs of 26 °C79 °F to 27 °C80 °F with 41 mm1.6 in to 65 mm2.6 in of precipitation per month.
The most challenging month is March, which is very wet (193 mm7.6 in) and humid (80% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for West Island
- Wetter months (January–June) — highs 2781 to 28 °C83 °F, lows 2780 to 28 °C82 °F, about 144 mm5.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Drier months (July–December) — highs 2679 to 27 °C80 °F, lows around 26 °C78 °F, about 64 mm2.5 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How West Island compares
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Porlamar (Venezuela, Aw), Roseau (Dominica, Am) and Castries (Saint Lucia, Am).
Nearby places
- Flying Fish Cove 985 km · 26 °C79 °F · 1,179 mm46 in
- Bengkulu 1,105 km · 27 °C81 °F · 3,097 mm122 in
- Lubuklinggau 1,189 km · 26 °C79 °F · 2,830 mm111 in
- Bandar Lampung 1,191 km · 27 °C80 °F · 1,916 mm75 in
- Baturaja 1,204 km · 26 °C79 °F · 2,344 mm92 in
- Pelabuhanratu 1,211 km · 27 °C81 °F · 2,458 mm97 in
- Metro 1,217 km · 27 °C80 °F · 1,884 mm74 in
- Serang 1,225 km · 27 °C81 °F · 2,073 mm82 in
Frequently asked questions
What is the warmest month in West Island?
April is the warmest month in West Island, with an average high of 28 °C (83 °F) and an average low of 28 °C (82 °F).
What is the coldest month in West Island?
September is the coldest month, with an average high of 26 °C (79 °F) and an average low of 26 °C (78 °F).
When does it rain the most in West Island?
March is the wettest month with about 193 mm (7.6 in) of precipitation; August is the driest with about 41 mm (1.6 in).
What is the best time to visit West Island?
Judging by long-term averages, the most comfortable months are August–November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.