World Resorts Saint Lucia Castries Weather

Castries Sea Temperature in September

Average sea water temperature in September:
+84.9°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:
2026
2025
2024

The average sea water temperature in September of 2026 was 85.0°F. The highest and lowest sea temperatures during the month were 85.3°F and 84.4°F.

Monthly sea water temperature in Castries, °F

Which Saint Lucia resorts have warmest sea in September?

Place name September 2026 September 2025
Castries 85.0°F 85.5°F
Vieux Fort 84.9°F 85.6°F

Best time for vacation in Castries

Sunniest months:
December 4 days
March 4 days
September 4 days
Warmest months:
September 86.7 °F
October 86.0 °F
August 85.7 °F
Warmest sea temp:
September 84.9 °F
October 84.6 °F
August 83.9 °F
Coldest months:
January 81.8 °F
February 81.9 °F
March 82.1 °F
Rainiest months:
August 7 days
October 5 days
September 5 days
Windiest months:
June 15.8 mph
February 15.4 mph
July 15.0 mph

Castries on a weather map

Current weather
18:39
Castries
+82°F
W 11 mph
Feels like: +88°F
Precip.: 21%
Places in Saint Lucia:
Name
°F
Vieux Fort
+82°F
Castries
+82°F
24 Hours Forecast
Castries
Local time: 18:39
October 15, thursday
2100
81°F
W
10 mph
October 16, friday
0000
81°F
W
9 mph
0300
79°F
W
7 mph
0600
79°F
W
7 mph
0900
84°F
W
11 mph
1200
86°F
W
12 mph
1500
86°F
W
13 mph
1800
82°F
W
11 mph
Units of measurement: °C / °F