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Conditions at Sebastian Inlet in May
May: The Grovel Season Begins
May is when the summer lull takes hold. Average swell height drops to around 2.5ft (0.7m), period to 7.9s, and ideal wind plummets to 17% of the time. The wave rose is dominated by small E windswell (37.7%), ENE (22.2%) and ESE (18.8%), but most of that energy sits in the knee-high to waist-high range. The wind rose is even more telling: E and ESE each hold 14.6%, with ENE at 11.7% and SE at 10.1%. These are onshore trades, breeding ground for chopped-up, short-period waves. Sebastian Inlet becomes a groveling spot, and you will need a high-tide sandbar plus a lucky hour of west wind to find anything rippable.
Air temps now average 25.2°C, water has warmed to 26.1°C, and rain increases to 3.35 mm/day. Bring a longboard, or wait for a rogue late-season cold front.
Average Spot conditions at Sebastian Inlet in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Sebastian Inlet 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 Sebastian Inlet for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sebastian Inlet 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 Sebastian Inlet.