Measurements:
°C
°F
CURRENT WEATHER
19:49
Castries
86°F
W 13 mph
Feels like: 94°F
Precip: 40%
World Resorts Saint Lucia Castries Weather

7 Day Weather Forecast

09.28
mon
DAY
90°F
W 14 mph
precip
24%
NIGHT
86°F
W 14 mph
precip
21%
09.29
tue
DAY
90°F
W 15 mph
precip
13%
NIGHT
84°F
W 13 mph
precip
30%
09.30
wed
DAY
90°F
W 14 mph
precip
25%
NIGHT
84°F
W 14 mph
precip
18%
10.01
thu
DAY
90°F
W 16 mph
precip
4%
NIGHT
84°F
W 14 mph
precip
18%
10.02
fri
DAY
90°F
W 14 mph
precip
5%
NIGHT
84°F
W 11 mph
precip
31%
10.03
sat
DAY
90°F
W 12 mph
precip
21%
NIGHT
86°F
W 14 mph
precip
18%
10.04
sun
DAY
88°F
W 15 mph
precip
10%
NIGHT
86°F
W 14 mph
precip
21%

Castries Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Castries was 29.4°F. The maximum and minimum values were 29.1°F and 29.6°F respectively.

Castries on the Weather Map

Best Time to Visit Castries
The most sunny months:
December 4 days
March 4 days
September 4 days
The most warm months:
September 90.8 °F
October 90.0 °F
August 89.7 °F
Warmest sea temperature:
September 88.7 °F
October 88.4 °F
August 87.7 °F
The most cold months:
January 85.3 °F
February 85.4 °F
March 85.7 °F
The most rainy months:
August 7 days
October 5 days
September 5 days
The most windy months:
June 16 mph
February 15 mph
July 15 mph
more details