St Lucia weather in August 2025

Expect 24°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in St Lucia in August. Check more long-term weather averages for St Lucia in August before you book your next holiday to South Africa in 2025/2026.

  • 24°C maximum daytime temperature in August in St Lucia24
    24°C max day temperature
  • 8 hours of sunshine per day
  • 7 days with some rainfall in August in St Lucia7
    7 days with some rainfall
  • 15°C minimum night-time temperature in August in St Lucia15
    15°C min night temperature
  • 11 hours of daylight per day in August in St Lucia11
    11 hours of daylight per day
  • No heat & humidity in August in St Lucia0
    No heat & humidity
  • 65 mm monthly rainfall in August in St Lucia65
    65 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in St Lucia6
    6 (High) UV index
  • 22°C sea temperature in August in St Lucia22
    22°C sea temperature

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The August weather guide for South Africa (St Lucia) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about South Africa

How hot is it in St Lucia in August?

Daytime temperatures usually reach 24°C in St Lucia in August, falling to 15°C at night.

How sunny is it in St Lucia in August?

There are normally 8 hours of bright sunshine each day in St Lucia in August - that's 72% of daylight hours.

How warm is the sea around St Lucia in August?

The average sea temperature around St Lucia in August is 22°C.

Does it rain in St Lucia in August?

There are usually 7 days with some rain in St Lucia in August and the average monthly rainfall is 65mm.

St Lucia August sunrise & sunset times

Browse the sunrise and sunset times for St Lucia in August 2025. Select a month to view St Lucia sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:33 17:21
Saturday, 16th August 2025 06:21 17:29
Sunday, 31st August 2025 06:05 17:36

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