Measurements:
°C
°F
Castries
82°F
W 19 mph
Feels like: 86°F
Precip: 68%
World Resorts Saint Lucia Castries Weather May Weather in Castries

Castries Weather: May

Average Day Temperature: 88.0°F
Average Night Temperature: 83.2°F
Sea Water Temperature: 85.4°F
Number of Sunny Days: 1 day
Sunshine Hours: 12.6 - 12.9 hours
Number of Rainy Days: 2 days
Precipitation Totals: 1.7 in

Air Temperature in May, °F

Select Year: 2025 2024 2023

The highest day temperature in May 2025 was 84°F. The lowest night temperature was 80°F. The average values for day and night temperatures during May were 82.6°F и 81.4°F respectivly.

Castries Water Sea Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Castries was 86.3°F. The maximum and minimum values were 85.2°F and 87.4°F respectively.

Sunny, Cloudy and Gloomy days

Most of the days in May are cloudy but you can also expect sunny or gloomy days.

Precipitation Totals in May, in

Precipitation total in May for Castries is 1.7 in.

Wind Speed in May, mph

The average wind speed in May is 14.5 mph.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Castries in May is 5.9 hours.

Best Time to Visit Castries
The most sunny months:
December 4 days
March 4 days
September 4 days
The most warm months:
September 90.9 °F
October 90.0 °F
August 89.8 °F
Warmest sea temperature:
September 88.7 °F
October 88.4 °F
August 87.7 °F
The most cold months:
January 85.4 °F
February 85.5 °F
March 85.8 °F
The most rainy months:
August 7 days
October 5 days
September 5 days
The most windy months:
June 16 mph
February 15 mph
January 15 mph

Castries on the Weather Map

Saint Lucia Resorts:
NAME
Castries +82
Vieux Fort +82
24 Hours Weather Forecast
Castries
Local time: 00:20
06 dec, saturday
0300 82°F
W
18 mph
0600 82°F
W
15 mph
0900 84°F
W
16 mph
1200 84°F
W
18 mph
1500 84°F
W
19 mph
1800 82°F
W
17 mph
2100 82°F
W
19 mph
07 dec, sunday
0000 82°F
W
17 mph