Conditions at Sri Lanka in December
December: Consistent Offshore and Peak Season
December is the crown jewel of the year at this spot. Ideal wind hits its maximum at 66%, thanks to a dominant westerly flow - 33.7% W, 16.8% WSW, 10.7% WNW - which produces glassy, offshore conditions for the east-northeast exposure. The swell drops slightly in size to 5.2ft (1.6m) but still carries a healthy 12.7s period, with the direction aimed strongly toward SSW (57.0%) and SW (36.5%), i.e., arriving from the NE-E window. The consistency and quality of the waves are at their high point. Water temp is a warm 29.3°C, air temp around 27.9°C, and precipitation increases to 7.59 mm/day, but the rain is usually in brief tropical bursts that don't affect the surf windows. December is the month to plan your strike if you want the best combination of clean wind, solid swell, and tropical warmth.
Average Spot conditions at Sri Lanka in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Sri Lanka during December. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Sri Lanka for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sri Lanka for December. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Sri Lanka.