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The average day light hours per day in St Lucia in February are 11.7 and there are 4.7 hours of sunshine per day on average during February making it a sunny month that is overcast at times. The ultraviolet index in St Lucia in February is typically 11.6 during February.
Even then a rash vest and board shorts should be fine for surfing at any time of year. St Lucia water temperatures are lowest at the start of August. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up. Actual sea surface water temperatures close to shore at St Lucia can vary by several degrees compared with these open water averages.