Saint Lucia (Castries) weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Good
Best time to visit: December – July
What is the weather like in Saint Lucia (Castries) in October?
In October, Saint Lucia (Castries) is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °C. The sea averages 29.2 °C – almost as warm as a bath. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 22 days, totalling 124 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Saint Lucia (Castries).
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 76 | 76 | 76 |
| Day | 29° | 29° | 28° |
| Night | 25° | 25° | 25° |
| Sea | 29° | 29° | 29° |
| Sun | 8 h | 8 h | 8 h |
| Rain days | 20 | 22 | 19 |
More details for October
- Daylight
- 11 h 50 min05:54 – 17:45
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 62 %on averageAll months
- Hot days
- 3 days30 °C or moreAll months
- Time zone
- UTC−4America/St_Lucia
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %82 %
- Few rainy daysweight 20 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Saint Lucia (Castries) in October: quick answers
Is Saint Lucia (Castries) hot in October?
Yes. In October, Saint Lucia (Castries) is hot: daytime highs average 29 °C and nights stay around 25 °C. On about 3 days the thermometer climbs to 30 °C or more.
Can you swim in Saint Lucia (Castries) in October?
Yes. In October the sea averages 29.2 °C – almost as warm as a bath.
Does it rain much in Saint Lucia (Castries) in October?
It rains often – on about 22 days, adding up to 124 mm.
Saint Lucia (Castries) month by month
The whole year in Saint Lucia (Castries)All destinations: Saint LuciaCaribbean weather in OctoberWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences