- Home
- ...North America
United States- Oceanside
Conditions at Oceanside in April
April: Long-Period Groundswell Under Pressure
April begins the shift toward summer, but Oceanside is still far from flat. Average swell height holds at 1.1m (3.5ft), and the directions favor the optimal window even more: WSW at 40.6%, W at 33.2%, and SW at 21.5%. Periods actually climb to 13.3s, giving the swell serious long-period punch. While most surf is in the 2-5ft (0.5-1.5m) range, the W direction still produces 6.8% waves in the 5-6.5ft (1.5-2m) class and another 1.7% in the 6.5-8ft (2-2.5m) class.
Wind is the limiting factor. Ideal offshore wind drops to 18%, and W winds dominate at 21.4%, with WSW at 14.6%. The spring sea breeze pattern becomes more reliable, so quality quickly fades after mid-morning. Early offshore pockets are rare but excellent when they arrive. Water temp is 14.4°C (57.9°F), air temps warm slightly to 15.6°C (60.1°F), and rainfall is minimal at 0.69mm/day. April is all about timing.
Average Spot conditions at Oceanside in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Oceanside 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 Oceanside for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Oceanside 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 Oceanside.