St Lucia Weather: Everything You Need To Know

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Sun, sea, sand, and luxury.

If these are the ingredients of your perfect vacation, then St. Lucia should be top of your list.

Perfect beaches, some with powdery white sand, others with dramatic dark volcanic sand, exclusive all-inclusive resorts, and outstanding service all make St. Lucia the ultimate luxury getaway.

But what about the weather?

This can make or break any trip, but when you’re seeking perfection, it helps to do a little research to make sure no-one rains on your parade.

Here’s our month by month guide to St. Lucia weather, to help make sure you choose the perfect climate for your luxury vacation.


Whilst much of the northern hemisphere is plummeting towards zero, St. Lucia continues to be drenched in sun. With an average temperature of 79 degrees Fahrenheit (26 Celsius), it’s true, January is a slightly cooler month – but who’s complaining?

Despite following hot on the heels of the rainy season, January is one of the driest months of the year. It averages just 92mm of rainfall and 9 rainy days, leaving you at least 22 days of glorious sunshine to enjoy.

January also benefits from refreshing breezes, making it one of the most comfortable months to visit St. Lucia. You’ll find it offers respite from the humidity that St Lucia is famous for during the summer months.

The sea temperature remains within a couple of degrees of the warmest months, at a very comfortable 81 degrees F (27C), meaning you won’t have to brace yourself to enter these turquoise waters.


February is when peak season gets into full swing, and it’s all about the weather.

Continuing where January left off, it’s warm, sunny, dry and breezy – the perfect combination for enjoying the tropics in comfort.

With average daily temperatures of 79 degrees F (26C) and 9 hours of sunshine (one up on January), you’ll find the temperature is very constant.

With an average of just 6 rainy days and only 57mm average rainfall, February is one of your safest bets for a dry and comfortable vacation.

If you’re planning one St. Lucia’s more strenuous activities, such as hiking the Pitons, February could be a good month to choose.

Check out our guide to conquering these heights by clicking here.


Right in the middle of high season, March takes it up a notch in terms of temperature, averaging 86 degrees Fahrenheit. This upward trend in temperature is matched by the lowest rainfall of the entire year.

You’ll have more chance of finding a unicorn than a wet day in March… well, not quite, but at an average of just 2.5 wet days a month, don’t bother bringing an umbrella…

With ten hours of sunshine and bathwater seas, and a gentle 14mph breeze you can easily see why visitors flock to this gem of an island during the month of March.


April begins to see a break in the hot, dry season, with a slight increase in showers. Still, with just 6 rainy days each month, it’s unlikely to hamper your vacation.

Average temperatures continue at a very comfortable 81 degrees, with a tiny range in temperature between average highs and lows. Windspeed is a comfortable 13 mph average, sufficient to keep the humidity at bay.

With 9 hours of full-on sunshine each day, you’ll have plenty of time to soak up the rays while sipping cocktails in your luxury accommodation.

April continues to be a popular time for tourists, and although it is the last month of the high season proper, the following months are also not too shabby weather wise.


Many people’s choice as the perfect month to visit as the main peak of visitors begins to tail off, but the St. Lucia weather remains delightful.

With sea temperatures now rising to an average of 82 degrees and the temperature following suit, May is a great month to top up your tan before the more humid summer months get going.

As May also sees a dip in average rainfall, to just 6 rainy days and 63mm, its comfortable and suitable for exploring St. Lucia’s famous tropical rainforests and mountain peaks.


The change from May to June is probably the most dramatic in St. Lucia weather in the whole year.

While the temperature remains steady at 82 degrees Fahrenheit, you begin to understand why they call it ‘rain’-forest.

June sees a jump from 63mm in May to 140mm in June, with an average of 14 rainy days per month. Although this is less than the months to follow, you should factor this in when planning your trip.

This pattern in St. Lucia weather is one of the main reasons why the tourist season dies down at this time of year.

Having said that, if you’re not put off by a few showers, then the sea remains warm and inviting and you’ll experience the island at its most lush and vibrant.


St. Lucia weather is very much affected by its unique natural features. With soaring mountain peaks, dense rainforest and dark volcanic sand beaches in the south, it is wetter and more humid than some of the other Caribbean islands.

July is the peak of the wet season, with thunderstorms to be expected. On average, 21 days out of the month experience rain, so be prepared for regular downpours.

Combine the extra rainfall with the continued equatorial hot weather – an average of 82 degrees – you should expect high humidity which can become pretty uncomfortable.

You may find yourself retreating to your hotel suite to enjoy the air conditioning more often at this particular time of year.


July and August are statistically very similar months, with averages of 82 degrees Fahrenheit and 21 rainy days, it’s hot and sticky but still has its fair share of fine, sunny days to enjoy.

Although a characteristic of St. Lucia weather is its thunderstorms during the wet season, it hasn’t suffered a major hurricane since Hurricane Allen struck in August 1980.

Still, August is not statistically the month most at risk of tropical storms and the vast majority of trips are free of such events.


September and October statistically the likeliest months for major storms. Average rainfall also peaks in September, with 200mm per month.

However, with nighttime temperatures staying at a comfortable 75 degrees, you’ll never have need of even a light jacket, although a waterproof may sometimes come in handy.

The sea remains a delightful 84 degrees, meaning it’s perfect to dive into the escape the humidity.


October may be the wettest month in the St. Lucia weather calendar, but it also brings may hot, sunny days for enjoying all aspects of a luxury resort.

Average temperatures remain high at a balmy 82 degrees Fahrenheit and the famed north-easterly trade winds take it up a notch, increasing to 13.6mph which means you can enjoy a refreshing respite from the humidity.


November is the month when the St. Lucia weather begins to turn a corner.

Although still in the wet season, we see a decrease in the number of rainy days, while the temperature remains high and the sea oh so inviting.

Average temperatures begin to rise, hitting 84 degrees and showing that the hot, dry season is well and truly on its way. Rainfall drops to an average of 167mm, making it the driest month since June.

Although humidity remains quite high, the sea and pool at your luxury resort can take care of that if it becomes too much. Couple it with an ice-cold offering from the bar, and you’ll be good to go.


The official start of the dry season, December sees a dramatic fall in rainy days, with just ten days on average experiencing some rain, and only 102mm falling in the whole month.

Daily hours of sunshine begin to rise too, and the refreshing trade wind holds steady, providing a beautiful compliment to the intensifying heat of the sun’s rays.

With the mercury hitting an average high of 86 degrees, you’ll have little to complain about. Just make sure that you pack plenty of sun protection as that breeze can be deceptive.

The lower rainfall and humidity of December mean the visitors begin flocking back and it’s a perfect time to explore all of St. Lucia’s attractions.

Whether your idea of paradise is a mountain hike or lying on your back in a gently swaying hammock, December is a great month to experience all this volcanic isle has to offer.

The Bottom Line on St. Lucia Weather

With its equatorial location and high sunshine levels, St. Lucia weather is always warm and inviting. Be sure to pack plenty of sun protection as you’ll need it to keep you safe from the strong UV rays you’ll experience here.

However, it’s worth checking the rainfall and humidity levels before you book, as both can make a big difference to your experience.

If you think you’ve identified the perfect month for your St. Lucia break, all you need now it the right resort to make it perfect. We think all-inclusive is the way to go – click here for 10 reasons why.

Check out our guide to the best of the best St Lucian resorts by clicking here.