Conditions at Sines in April
April: Spring Corn-Style Surf
April sees the North Atlantic settle into a shoulder-season rhythm. Average swell heights ease to 5.9ft (1.8m) and average periods drop to 11.2 seconds, which still provides solid, rideable surf. The swell window has shifted north: NW stands at 34.7 percent and WNW at 28.8 percent, while W energy adds another 8.3 percent. The favorable S/SW and WSW swells remain a smaller slice, so patience is key. That said, clean offshore winds are still present around 50 percent of the time, and the lighter spring winds make for glassy mornings and beautiful afternoon sandbar sessions.
Air temps are comfortable at 15.3°C, with rain around 1.71 mm per day. Water temperature is 15.7°C, so a 4/3 remains the right call.
Average Spot conditions at Sines in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Sines 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 Sines for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sines 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 Sines.