Conditions at Keramas in December
December: Wet-Season Gold Returns
December is when Keramas re-enters its prime. Ideal wind reaches 49%, the average swell height is a fun 3ft (0.9m), and the 12.6s average period keeps the SSW/SW groundswell punching. The direction mix is cleaner and more westerly than in the dry season: SSW 72.1%, SW 22.7%, WSW 4.7%. Most of the energy is in the 2-3ft (0.5-1m) class, with solid 3-5ft (1-1.5m) percentages from both SSW (12.1%) and SW (7.1%). This is the classic Keramas recipe-good direction, long period, and a reactive reef.
The wind distribution is dominated by WSW (22.5%), W (18.3%), SW (14.2%) and WNW (4.4%), with mostly light 0-10kph speeds. A healthy share of days now feature the offshore/cross-offshore flow Keramas needs, matching the 49% ideal figure. As the northwest monsoon deepens, afternoon tropical rain becomes common: 8.86mm/day, air temps around 27.2°C (24.0-32.4°C), and warm 29.3°C water. Holiday-season swell pulses are only just beginning.
Average Spot conditions at Keramas in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Keramas 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 Keramas for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Keramas 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 Keramas.