Conditions at Keramas in May
May: Dry Season Chop Churns the Reef
May marks a clear shift into the SE trade-wind season. Average swell height ticks up to about 3-4ft (1.0m) and the period reaches 14.0s-the waves are long-period, powerful and increasingly consistent, with a strong S component (36.0%) alongside SSW (53.3%). The distribution shows an excellent-looking mix: about 27.5% of SSW is 2-3ft (0.5-1m), 25.0% is 3-5ft (1-1.5m), and some 1.5-2m (5-6ft) sets appear. But the window for clean waves is tiny.
Only 4% of the time is the wind ideal. ESE winds (37.2%) and SE winds (35.4%) dominate, often blowing 10-20kph, stacking short-period chop on top of an otherwise good SSW/S groundswell. The dry season has arrived: rainfall drops to 2.37mm/day, air temps average 26.6°C (23.1-30.2°C), and water temp cools to 28.8°C.
Average Spot conditions at Keramas in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Keramas during May. 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 May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Keramas for May. 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.