World Resorts Saint Lucia Castries Weather

Castries Sea Temperature in September

Average sea water temperature in September:
+84.8°F
Minimum sea water temperature in September: 86.9°F
Maximum sea water temperature in September: 82.9°F

Daily sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 85.5°F. The highest and lowest sea temperatures during the month were 85.8°F and 84.9°F.

Monthly sea water temperature in Castries, °F

Which Saint Lucia resorts have warmest sea in September?

Place name September 2025 September 2024
Vieux Fort 85.6°F 86.5°F
Castries 85.5°F 86.3°F

Best time for vacation in Castries

Sunniest months:
December 4 days
March 4 days
September 4 days
Warmest months:
September 86.8 °F
October 86.0 °F
August 85.8 °F
Warmest sea temp:
September 84.8 °F
October 84.6 °F
August 84.0 °F
Coldest months:
January 81.9 °F
February 81.9 °F
March 82.2 °F
Rainiest months:
August 7 days
October 5 days
September 5 days
Windiest months:
June 15.7 mph
February 15.4 mph
January 15.1 mph

Castries on a weather map

Current weather
23:59
Castries
+79°F
W 17 mph
Feels like: +82°F
Precip.: 100%
Places in Saint Lucia:
Name
°F
Vieux Fort
+79°F
Castries
+79°F
24 Hours Forecast
Castries
Local time: 23:59
December 05, friday
0000
79°F
W
17 mph
0300
77°F
W
16 mph
0600
79°F
W
15 mph
0900
81°F
W
17 mph
1200
81°F
W
17 mph
1500
79°F
W
19 mph
1800
79°F
W
17 mph
2100
79°F
W
19 mph
Units of measurement: °C / °F