Conditions at Choshi in April
April: Spring Mix, More South Swell, Less Wind
April sees the surf arena shift significantly. Average height eases back to 5ft (1.6m), periods drop to 9.2s, and the ideal wind percentage falls to 26%. The wave direction data now shows a much more even distribution, with E, ESE and SE swells together accounting for about 43% of the energy. For the first time, the south quadrant delivers a sizable contribution at about 25% of the observations. The catch is that SSW winds become the leading wind direction at 14%, with SW/S/SSE flows all eating into dry offshore windows. This means the beach often sees side-shore or onshore windswell rather than clean groundswell. The good days in April come when low pressure in the North Pacific brushes the region, drawing in NW winds and turning the SE swell into crisp, walled-up waves. Water temps rise to 14.4°C, signalling the beginning of the spring warm-up.
Average Spot conditions at Choshi in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Choshi 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 Choshi for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Choshi 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 Choshi.