St Lucia
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St Lucia

December beach and weather guide

Based on 5 years of historical ERA5 climate data

Photo by Germine Sealy on Unsplash

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December beach conditions — historical average

Excellent
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📉 Our data shows more unsettled conditions in 2023-2024 compared to 2020-2021 for this destination and time of year
27.5°C Temp
28.3°C Sea temp
8.4 Rain days
10.7h Sunshine hrs
76.6% Humidity
100%

Reliable conditions

5 of 5 years were good

Year by year — mid December

2024 Good 27.6°C · 13 rainy days · 10.7h sun
2023 Good 27.2°C · 12 rainy days · 10.6h sun
2022 Excellent 27.4°C · 4 rainy days · 10.3h sun
2021 Excellent 27.8°C · 6 rainy days · 10.8h sun
2020 Excellent 27.3°C · 7 rainy days · 11.0h sun

Other months in St Lucia

November December January February March April

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Each trip type is scored on what matters most for it — snow days for skiing, sea temp for beach, sunshine for sightseeing.

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About St Lucia in December

Based on 5 years of ERA5 historical climate data, December in St Lucia has historically been excellent for a beach holiday. Average temperatures of 27.5°C with sea temperatures around 28.3°C and 8.4 rainy days on average.

5 of the last 5 years had good beach conditions during this period. This data uses ERA5 reanalysis records — real historical measurements, not generalised averages.

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