Hot in Mar
30°C average high
avg high · 21° at night
25°C+ on 9 in 10 days
Caribbean
St Lucia weather in March
Is it warm? Yes. March in St Lucia is warm: afternoons average 28°C and nights 22°C. Most days (80%) peak between 26°C and 29°C.
Warm · average high
28°C
25°C or more on almost every day.
- Average low22°overnight
- Sea28°average, 2023–2025
- Rainy days638 mm in the month
- SkyOften cloudy46% cloud · 26% clear days
How warm it really gets
Every March afternoon from 2011–2025: 465 days. Most (80%) peaked between 26° and 29°.
March, year by year
The average March high in each year. The warmest, 2024, averaged 29°C; the coolest, 2012, 27°C.
Compared with home
Average March highs. Expect rain on about 6 days (38 mm in a typical month).
- St Lucia28°
- London11°
- Cork10°
- Dublin10°
- Manchester10°
- Belfast9°
- Glasgow9°
Warmer in March, not much further
Flying times are estimates from Dublin; St Lucia is about 8h 30m.
Hot in Mar
29°C average high
avg high · 14° at night
25°C+ on 9 in 10 days
Hot in Mar
29°C average high
avg high · 18° at night
25°C+ on 8 in 10 days
Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology