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Gros Islet Weather in August
Gros Islet in August sees very high temperatures, with highs around 30°C (86°F) and overnight lows of 26°C (79°F). Rainfall is fairly high at around 131 mm (5.2 in) on average, so pack waterproofs just in case.
Rainfall in Gros Islet in August
Historically, August sees about 20 days of rain, with a monthly average of 131 mm (5.2 in). Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Gros Islet in August
In August, Gros Islet gets very high temperatures, with highs of 30°C (86°F). Nights cool to around 26°C (79°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. Nights stay warm at around 26°C (79°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Gros Islet in August
There are approximately 248 hours of sunshine this month, resulting in mostly clear days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April and December typically offer the best weather for Gros Islet.
Gros Islet Temperature in August
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
67%
Precipitation
131 mm (5.2 in)
Rainy days
20 days
Humidity
80% *
Sunshine
248 hours *
Percentage Sunshine
*
* Data from: Saint Lucia, Saint Lucia (8 KM, 5 Miles).
Gros Islet Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Gros Islet - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Gros Islet typically stay consistent throughout August, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in August
Historical weather records for Gros Islet in August
Browse day-by-day weather records for Gros Islet spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Gros Islet historical weather extremes in August
Our historical data for Gros Islet spans 1990 to 2026, revealing these weather extremes.
- On August 29, 2020, temperatures climbed to 35°C (95°F), marking the warmest August day on record.
- The lowest daytime temperature in August was 26°C (79°F), recorded on August 14, 1993.
- Gros Islet registered its coldest August night on August 30, 2016, with temperatures dropping to 21°C (70°F).
Best Places in Saint Lucia in August
Find out more about the weather in Saint Lucia and which places have the best travel conditions in this month. See all of Saint Lucia in August →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Gros Islet in August
Warm but pleasant conditions in Gros Islet in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Gros Islet in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Gros Islet 3-Day Forecast
More climate data for Gros Islet
Temperature Rainfall Sunshine Humidity
See the full Gros Islet climate overview or explore weather in Saint Lucia.
Popular in August
Where to go in August - average daytime high across popular destinations.
Castries
31°C (88°F) Marigot Bay31°C (88°F) Laborie
30°C (86°F) Rodney Bay Village30°C (86°F) Cap Estate30°C (86°F) Soufrière31°C (88°F) Gros Islet30°C (86°F) Vieux Fort30°C (86°F) Bucket list
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