Conditions at Aterro in April
April: Transition Time, Cleaner But Smaller
April is about transition. Average wave height drops to 6-7ft (1.8-2.1m) and period to 10.9 seconds. The swell direction window remains remarkably good: WNW (23.8%) and NW (26.0%) account for half the energy, with W (9.5%) and WSW (3.2%) adding more. Though smaller, the waves retain shape and can be rippable on the sandbars.
The trade-off is wind. Ideal conditions fall to 28%, as NW (9.2%) winds blow onshore and the persistent NNW (21.9%) flow adds cross-shore texture. E (6.1%) and SSW/SW (6.0%/5.9%) days still offer occasional clean windows. Water temps climb to 14.6°C, air to 13.6°C, with 3.09 mm/day of rain - spring is knocking, but winter still has a foot in the door.
Average Spot conditions at Aterro in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Aterro during April. 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 Aterro for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Aterro for April. 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 Aterro.