Climate Insights for Saint Lucia

The climate in Saint Lucia is warm and mild. The average annual temperature is 23°C and approximately 1138mm of precipitation falls per year. Saint Lucia receives a notable amount of rainfall throughout the year, including during its driest month. Saint Lucia is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: February, March, January. The coldest months are July, August, June, when temperatures can drop to 19°C.

Saint Lucia has relatively stable temperatures year-round, staying within a 7°C range. The warmest month is February, when average highs reach 26°C and the mean temperature sits around 25°C. July is the coolest month, with minimum temperatures around 19°C and an average of 20°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

Saint Lucia is a moderately rainy area, receiving approximately 1138mm of precipitation annually, which averages out to around 95mm per month. The wettest month is February, averaging 159mm of rainfall. March and April also tend to see above-average precipitation. The driest month is August, with just 47mm. That's 112mm less than February, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Saint Lucia is very windy, with an average annual wind speed of 36km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 39km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in March, with average winds dropping to 33km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months.

It is currently winter in Saint Lucia, which began on June 21, 2026. Saint Lucia is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in February at around 26°C, while the coldest stretch bottoms out in July near 19°C. Autumn is next, beginning on March 20, 2026 — 3 days from now.

The best time to visit Saint Lucia is during June, July, August, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 67mm per month. By contrast, February can be uncomfortably hot with temperatures reaching 26°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Saint Lucia based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.