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Conditions at Rincon Point in May
May: The South Swell Seeds Arrive
May marks the first real hints of southern hemisphere energy. Average height remains around 4ft (1.2m) but the period slides to 10.5s, and the swell spectrum starts to broaden: WSW jumps to 17.6% and SW to 4.1%, pushing the combined SSE/S/SSW/SW window to about 4.6%. Still, W and WNW swells dominate with roughly 77% of the spectrum. The big problem is wind - ideal offshore days fall to only 18%, and the wind rose becomes dominated by WSW/W flow at 21-22% each. The point gets particularly clean during early morning glass-offs before the seabreeze ramps up.
May warms up nicely with average air temperature 17.0°C, water temperature 13.2°C, and precipitation down to 0.36 mm/day. It's a shoulder month: winter waves are fading, summer south swells aren't quite regular, and the surf quality depends heavily on tide and wind timing.
Average Spot conditions at Rincon Point in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Rincon Point 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 Rincon Point for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Rincon Point 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 Rincon Point.