Conditions at Il Castello in May
May: Small Swell and Fickle Winds
May sees the surf energy drain away. The average swell height falls to 0.6m (2ft), the period shortens to 4.5s, and ideal wind drops to just 12%. S swell is still the most common direction at 16.9%, followed by WSW (15.4%) and SW (14.1%), but almost all of it is in the 0-0.5m (0-1.5ft) and 0.5-1m (1.5-3ft) classes. Decent 1-1.5m (3-5ft) SW/WSW swell is rare, making up only about 4.3% of the total. The wind regime becomes more variable, with SSE (8.9%), WNW (7.7%) and SE (7.5%) all well represented; onshore flow from S/SW/WSW totals 27.1%, so the sea is frequently textured. Air temperatures are warmer at 17.8°C, water reaches 18.9°C (66.0°F), and spring showers add 1.67mm/day. This is small-wave and longboard season - occasional clean days, but nothing to get too excited about.
Average Spot conditions at Il Castello in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Il Castello 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 Il Castello for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Il Castello 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 Il Castello.