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Castries, Saint Lucia Weather Averages

. The most daily sunshine hours in Castries are 10 in March. The best month to swim in the sea is in August when the average sea temperature is 29°C (84°F).

Average Daily Sunshine Hours Castries

What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer
What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer

Average Sea Temperature Castries

What is Average Sea Temperature?
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface
What is Average Sea Temperature?
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface

Castries : Next 24-Hour Weather

Today - 13th January 2026

Sunrise 06:31

Sunrise

Sunset 17:54

Sunset
11:00
Patchy light drizzle
27°C (81°F)
12:00
Patchy rain possible
28°C (81°F)
13:00
Patchy rain possible
28°C (81°F)
14:00
Patchy rain possible
27°C (81°F)
15:00
Patchy rain possible
27°C (80°F)
16:00
Patchy rain possible
27°C (80°F)
17:00
Patchy rain possible
27°C (79°F)
18:00
Patchy rain possible
26°C (78°F)
19:00
Patchy rain possible
26°C (78°F)
20:00
Patchy rain possible
26°C (78°F)
21:00
Patchy rain possible
26°C (78°F)
22:00
Patchy rain possible
26°C (78°F)
23:00
Light rain shower
26°C (78°F)

Tomorrow - 14th January 2026

Sunrise 06:31

Sunrise

Sunset 17:54

Sunset
0:00
Light rain shower
26°C (77°F)
1:00
Patchy rain possible
26°C (77°F)
2:00
Patchy rain possible
25°C (77°F)
3:00
Patchy rain possible
25°C (77°F)
4:00
Patchy rain possible
26°C (77°F)
5:00
Patchy rain possible
26°C (77°F)
6:00
Patchy rain possible
26°C (77°F)
7:00
Patchy rain possible
26°C (78°F)
8:00
Patchy rain possible
27°C (79°F)
9:00
Patchy rain possible
27°C (80°F)
10:00
Patchy rain possible
27°C (81°F)