July · Saint Lucia
Best time to visit Castries in July Weather, crowds & prices
Weather in Castries in July
Average temperature 29°C, 68 mm of rain, about 28 days with 6+ hours of sunshine and 79% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
July score
9.0/10
Ranked #8 of 12 months
- Avg temp
- 29°C
- Rainfall
- 68 mm
- Humidity
- 79%
- Days with 6h+ sun
- 28
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
July in Castries scores 9.0/10 for beach and coastal travel - ranked #8 of 12. Expect around 29°C, 68 mm of rain, and roughly 28 days with 6+ hours of sunshine this month.
Castries is Saint Lucia's capital, a harbour town beneath green hills on the island's northwest coast.
July in Castries — one of the year's strongest windows (8th)
Days in July average 29°C (84°F) and humidity near 79% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Budget for roughly 68 mm of rain this month — a flexible day or two helps — with about 28 days with 6+ hours of sunshine and 12.8 hours of daylight to work around it.
On our climate-comfort scale this is one of the strongest months of the year for Castries at 9/10 (8th of 12), just behind March at 9.8/10.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
Budget for mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Castries in July?
- In July, Castries averages 29°C, 68 mm of rain, and about 28 days with 6+ hours of sunshine. Its climate-comfort score is 9.0/10.
- Is July a good time to visit Castries?
- July earns a 9.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Castries in July?
- Expect about 68 mm of rain in July. Average humidity is 79% and there are about 28 days with 6+ hours of sunshine.
Curated in Castries
Tickets & experiences
Things to do in Castries
Castries, Saint Lucia. Live activities and tours from GetYourGuide, matched to this destination.