Climate and monthly weather forecastGrand Anse Beach, Saint Lucia
Climate and monthly weather forecast
The climate of Grand Anse Beach
Grand Anse Beach is geographically positioned in Saint Lucia, a region chiefly governed by the Af Köppen climate classification. This particular classification denotes a Tropical rainforest climate. The tropical climate of Grand Anse Beach manifests through consistently high temperatures and frequent rainfall throughout the year. In essence, the island experiences two seasons: dry and wet, but the transition is difficult to detect due to the constant drizzle.Temperature fluctuations in the region are minimal, with average high temperatures oscillating from 28°C (82.4°F) to 30°C (86°F) and the trend continuing throughout the year. Proportional fluctuations are noted in average low temperatures that range from 22°C (71.6°F) in January and February to 25°C (77°F) in July. Sea temperatures do not dramatically deviate either, with a steady progression from 26°C (78.8°F) at the start of the year, peaking at 29°C (84.2°F) in the months of September and October, then gradually decreasing back to 27°C (80.6°F) by December.
Rainfall peaks in September, with an average of 269mm (10.59") spread over about 25 days. January is the driest month, reporting a far lesser 113mm (4.45") of precipitation dispersed over 17 days. Neither month, nor indeed any period of the year, is entirely free of precipitation, a tribute to the overarching Tropical rainforest climate.
Notwithstanding the frequent rain, Grand Anse Beach enjoys abundant sunshine, with an annual average of 8 hours per day. In terms of daylight, the shortest day is in December with 11.3 hours, and the longest in June with 12.9 hours. The UV index conveys high figures from February to October, peaking at 12 in March, April, May, June, and July.
The best time to visit Grand Anse Beach
Given Grand Anse Beach's tropical disposition, visiting it wholly hinges on one's personal threshold for heat, humidity, and rain. However, when these coupled aspects are considered, January and February emerge as the most appealing months for a visit. With lower rainfall over 17 days. Beachgoers should take note that the sea temperature remains comfortably warm at 27°C (80.6°F).Weather in February
The weather in Grand Anse Beach, Saint Lucia, doesn’t vary dramatically from January to February. February experiences a notable decrease in rainfall and rainy days, thus marking it as a dryer month. An average rainfall of 86mm (3.39") over 13 days is recorded. Weather in February »Weather in March
March sees a further steep decrease in the volume of rainfall, with a total of 76mm (2.99") making it the year's driest month. However, the temperature rises slightly, making afternoons a bit warmer. A higher UV index of 12 implies a stronger sun, hence protection from harmful ultraviolet rays becomes increasingly crucial. Weather in March »Weather in April
April showcases a moderate rise in temperature, marking the advent of warmer days. Ever so slight a rise can be noted with a low-temperature average of 23°C (73.4°F) to 24°C (75.2°F); the rainfall levels rise to 96mm (3.78"). Weather in April »Weather in May
May represents a transition of seasons in Saint Lucia, characterized by higher temperatures and increased rainfall levels. The weather is notably wetter, with rainfall surging to 124mm (4.88"), making it a rainier month. This month's temperature highlights are relatively high, laying the groundwork for the impending hot season. Weather in May »Weather in June
June marks the annual high point in rainfall with 182mm (7.17") logged over 19 days. Alongside increased showers, the month's temperatures and sea warmth help sustain a tropical vibe at Grand Anse Beach. The daylight and sunshine hours, barely changing from May, continue to offer ample opportunity for beachside relaxation. Weather in June »Weather in July
July is notable for the highest volume of rainfall witnessed throughout the year, with a significant increase to 245mm (9.65"). Concurrently, the warmest monthly average low temperature of 25°C (77°F) makes its appearance this month. Weather in July »Weather in August
The weather patterns remain consistent in August, with a slight decline in rainfall and no significant change in temperature compared to July. Making it through the peak of the rainy season as rainfall drops to 216mm (8.5"). The sea remaining at a steady 28°C (82.4°F) makes August ideal for those preferring warmer sea temperatures. Weather in August »Weather in September
As Saint Lucia progresses into autumn, September carries the year's highest number of rainy days at 25. Rainfall remains persistently high at 224mm (8.82") despite the entrance into the latter half of the year. Weather conditions continue to maintain the extended tropical summer feel, with temperatures staying around the 30 degrees mark. Weather in September »Weather in October
October weather at Grand Anse Beach sees the accumulated rainfall peak at 269mm (10.59"). However, despite the high rainfall, the decreased number of rainy days marks the beginning of the end of the rainy season. The daylight hours and UV index gradually decline, signalling the transition into the cooler season. Weather in October »Weather in November
As the year draws to a close, November offers a pleasant abatement in the volume of rainfall, which reduces to 255mm (10.04"). The decrease in daylight hours and a slight dip in the UV index highlight the transition towards the year-end. Weather in November »Weather in December
December greets Grand Anse Beach with a further decrease in rainfall to 149mm (5.87"). The dropping temperature, sea warmth, decreasing daylight, and UV index all point towards the advent of the cooler season. Despite this, the daytime remains comfortably warm, with temperatures averaging from 29°C (84.2°F) to 23°C (73.4°F). Weather in December »Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The coldest months are January and February, with an average high-temperature of 28°C (82.4°F).
Throughout the year, there are 209 rainfall days, and 2035mm (80.12") of precipitation is accumulated.
January through September, November and December, with an average of 8h of sunshine, are months with the most sunshine in Grand Anse Beach.
The months with the coldest seawater are February and March, with an average sea temperature of 26°C (78.8°F).
The month with the least rainfall is March, when the rain falls for 13 days and typically collects 76mm (2.99") of precipitation.
March through September, with an average maximum UV index of 12, are months with the highest UV index in Grand Anse Beach.
The months of May through October are noted for their peak temperatures in Grand Anse Beach, Saint Lucia, with an average high-temperature of 30°C (86°F).
With an average of 12h and 54min of daylight, June has the longest days of the year.
September and October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Grand Anse Beach.
The month with the most rainfall in Grand Anse Beach, Saint Lucia, is October, when the rain falls for 18 days and typically aggregates up to 269mm (10.59") of precipitation.
With an average of 7h of sunshine, October has the least sunshine of the year in Grand Anse Beach.
With an average of 11h and 18min of daylight, December has the shortest days of the year in Grand Anse Beach.
Grand Anse Beach does not observe Daylight Saving Time (DST). AST timezone is used over the entire year.
With an average maximum UV index of 8, December is the month with the lowest UV index in Grand Anse Beach.
Average temperature
Grand Anse Beach, Saint Lucia
The warmest months (with the highest average high temperature) are May, June, July, August, September and October (30°C).
The months with the lowest average high temperature are January and February (28°C).
The month with the highest average low temperature is July (25°C).
The coldest months (with the lowest average low temperature) are January, February and March (22°C).
Average rainfall
Grand Anse Beach, Saint Lucia
- Average rainfall in January:
113mm - Average rainfall in February:
86mm - Average rainfall in March:
76mm - Average rainfall in April:
96mm - Average rainfall in May:
124mm - Average rainfall in June:
182mm
- Average rainfall in July:
245mm - Average rainfall in August:
216mm - Average rainfall in September:
224mm - Average rainfall in October:
269mm - Average rainfall in November:
255mm - Average rainfall in December:
149mm
The wettest month (with the highest rainfall) is October (269mm).
The driest month (with the least rainfall) is March (76mm).
Average rainfall days
Grand Anse Beach, Saint Lucia
- Average rainfall days in January:
17 days - Average rainfall days in February:
13 days - Average rainfall days in March:
13 days - Average rainfall days in April:
11 days - Average rainfall days in May:
15 days - Average rainfall days in June:
19 days
- Average rainfall days in July:
21 days - Average rainfall days in August:
20 days - Average rainfall days in September:
25 days - Average rainfall days in October:
18 days - Average rainfall days in November:
19 days - Average rainfall days in December:
18 days
The month with the highest number of rainy days is September (25 days).
The month with the least rainy days is April (11 days).
Average sea temperature
Grand Anse Beach, Saint Lucia
The best months for swimming (with the highest average sea temperature) are September and October (29°C).
The coldest months (with the lowest average sea temperature) are February and March (26°C).
Average daylight / Average sunshine
Grand Anse Beach, Saint Lucia
- Average daylight in January:
11h and 24min - Average daylight in February:
11h and 42min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 30min - Average daylight in May:
12h and 48min - Average daylight in June:
12h and 54min
- Average daylight in July:
12h and 54min - Average daylight in August:
12h and 36min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 48min - Average daylight in November:
11h and 30min - Average daylight in December:
11h and 18min
The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 18min).
The months with the most sunshine are January, February, March, April, May, June, July, August, September, November and December (Average sunshine: 8h).
The month with the least sunshine is October (Average sunshine: 7h).
Average UV index
Grand Anse Beach, Saint Lucia
The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 8).
