Temperature
Hot by day, warm at night.
85°Ftypical Aug high
Castries
St. Lucia · Caribbean
Castries is most comfortable in the drier months around January to March. Typical daytime highs run about 82-86°F year-round. The climate is warm and humid. Rainy season runs roughly June to November.
Best time to go
12 mo · Typical year
Temperature range
75°F to 86°F
Rain
15 days/mo
Sunshine
11.2 h/day
Humidity feel
Humid year-round
When to visit
Month-by-month fit
Precipitation
Rain most days.
71%wet-day frequency
AmountWet-day chance
Sunshine
Plenty of sun this month.
11.4 hAug sunshine
Heat & humidity by month
Warm days, with some hot afternoons and occasional humid spells.
Very humidAug heat feel
Air-feel chart data is unavailable for this destination. Use the selected-month dew point, temperature, rain, and sunshine context together rather than treating any one metric as total comfort.
Sea temperature
84°Aug sea temp
More detailIncludes sky and daypart comfort
Cloud cover
Partly cloudy across the month.
45%Aug clear sky
ClearCloud cover
Similar
Similar things to doSt. JohnUS Virgin IslandsSimilar things to doEl NidoPhilippinesSimilar things to doLabuan BajoIndonesiaSimilar things to doSanta MartaColombia
Want a side-by-side climate view? Compare Castries with St. John.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology