Best time to visit Saint Lucia
The best time to visit Saint Lucia is during February to mid-April, when you can expect the least amount of rainfall and cooler temperatures averaging 26°C (78°F).
However, anytime from January through to mid-April during the cooler, dry season is good, with temperatures ranging from an average high of 29°C (85°F) to a low of 23°C (73°F).
St Lucia weather
Saint Lucia experiences a hot and humid tropical climate year-round, with a relatively cooler and drier season from January to mid-April, and a hot, humid and rainy season from June to mid-December.
Rain can fall at any time in St Lucia but usually as light showers. Rainfall varies depending on area but is more frequent and abundant from June to mid-December, and less frequent from January through May. February and March are the driest months.
Here are the average temperatures recorded in Castries, the capital, located on the northwestern coast of St Lucia.
What is the best month to visit St Lucia?
February, March and April are the best months to visit St Lucia, since this is the driest time of year, with warm, sunny weather, mainly clear skies and good conditions for swimming.
What is the hottest month in St Lucia?
The hottest month of the year in St Lucia is September, with an average high of 32°C (89°F) with high heat and humidity, and low of 25°C (77°F).
The hot season lasts from mid-July though October, with an average daily high temperature above 30°C (86°F).
What is the coldest month in St Lucia?
The coldest month in St Lucia is February, with an average daytime high temperature of 29°C (84°F) and an average low temperature of 23°C (73°F).
The cooler season lasts from mid-December to early-March, with an average daily high temperature below 29°C (84°F).
Which is the sunniest month in St Lucia?
The sunniest time of year in St Lucia is normally February with bright sunshine on average for 72% of daylight hours; that's eight hours of sunshine per day.
What is the humidity in St Lucia?
St Lucia experiences experiences little seasonal variation in perceived humidity, with approximate average relative humidity calculated at between 71% – 78% over the course of the year. Typically, it's humid all year round.
What do the humidity conditions feel like in St Lucia?
We derive the humidity comfort level – what conditions feel like – from the dew point temperature, which measures moisture content in the atmosphere: a higher dew point feels more humid, while a lower dew point feels drier.
Meteorologists agree that dew point temperature is a more consistant indication of 'absolute humidity' than relative humidity, which fluctuates with temperature.
The average annual dew point in St Lucia is 23°C (73°F), and varies over the course of the year from humid at 21°C (66°F) to muggy at 24°C (75°F).
When is the sea warmest in St Lucia?
The sea is usually at its warmest in St Lucia in September when the water temperature averages 29°C (84°F), which is pleasant for swimming.
The sea is warm enough for swimming all year-round in St Lucia.
Which month has the most rain in St Lucia?
October is usually the wettest month in St Lucia with 205mm (8in) of rainfall on average distributed across 13 days.
The wet season lasts from early-June through to mid-December, with a greater than 33% chance of any given day being a wet day. Downpours are usually followed by hot and sunny weather.
The drier season lasts from mid-December through May. The month with the fewest wet days in St Lucia is March.
Which is the windiest month in St Lucia?
The windiest month of the year in St Lucia is June, with an average hourly wind speed of 28 kilometres per hour (15 knots; 17mph).
The windy part of the year lasts from late-November to mid-August, with average wind speeds of more than 24 kilometres per hour (13 knots; 15mph).
The less-windy time of year lasts from mid-August to late-November. The calmest month of the year in St Lucia is September, with an average hourly wind speed of 21 kilometres per hour (10 knots; 12mph).
The predominant average hourly wind direction in St Lucia is from the east throughout the year.
What's the likelihood of a storm in St Lucia?
The months of June through November all carry a slight risk of a tropical storm, with the likelihood greatest from August to October, with a 4% risk in September.
St Lucia Weather Averages
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Average high temperature (°C) | |||||||||||
| 29 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 32 | 31 | 30 | 30 |
| Average low temperature (°C) | |||||||||||
| 23 | 23 | 23 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 |
| Average daily sunshine (hrs) | |||||||||||
| 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 8 | 8 |
| Average daily daylight (hrs) | |||||||||||
| 11 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 |
| Comfort level – heat | |||||||||||
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| Comfort level – humidity (#muggy days) | |||||||||||
| 30 | 28 | 30 | 30 | 31 | 31 | 31 | 31 | 30 | 31 | 30 | 31 |
| Average dew point temperature (°C) | |||||||||||
| 22 | 21 | 21 | 22 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 22 |
| Average relative humidity (%) | |||||||||||
| 74 | 71 | 71 | 71 | 72 | 74 | 75 | 77 | 75 | 77 | 78 | 75 |
| UV Index (max) | |||||||||||
| 9 | 11 | 11+ | 11+ | 11+ | 11+ | 11+ | 11+ | 11+ | 11 | 9 | 8 |
| Average days of rainfall (≥1mm) | |||||||||||
| 8 | 6 | 6 | 7 | 8 | 10 | 12 | 13 | 12 | 13 | 13 | 9 |
| Average monthly rainfall (mm) | |||||||||||
| 89 | 65 | 63 | 65 | 89 | 119 | 158 | 182 | 126 | 205 | 166 | 113 |
| Average wind speed (km/h) | |||||||||||
| 28 | 27 | 26 | 25 | 26 | 28 | 27 | 24 | 21 | 21 | 24 | 26 |
| Average sea temperature (°C) | |||||||||||
| 27 | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 |
| Castries, St Lucia | |||||||||||
Holiday seasons
High Season: December to late-May; Low season: June to November.
Source: Meteorological data for St Lucia is based on weather statistics gathered for the period 2012 to 2021 from the closest weather station: George F. L. Charles Airport (SLU), also known as Vigie Airport, located 2km (1.2mi) north of the capital, Castries. Additional climate data is sourced from the United States National Oceanic and Atmospheric Administration (NOAA).
Advice on the best time to visit a particular destination is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.
Latest update: Best time to visit St Lucia: 16 May, 2024
Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.
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