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Conditions at Sebastian Inlet in January
January: Winter's Cleanest Window
The new year delivers Sebastian Inlet's most consistent winter surf. The wave rose shows a healthy spread of optimal easterly energy - E (21.9%), ENE (15.8%), NE (13.5%) and NNE (11.1%) - while the average period of 8.2s keeps waves punchy and rideable rather than raw power. The average swell height sits around 2.5ft (0.8m), with most waves in the 2-3ft (0.5-1m) range and enough 3-5ft (1-1.5m) pulses to keep the jetties interesting. This is the month with the highest percentage of favorable wind at 34%, thanks largely to frequent NW/NNW post-frontal flow (NW 9.7%, NNW 12.8%, WNW 8.5%) that takes the onshore sting off the surface. When a cold front clears the coast and the wind turns W/SW, the E/NE groundswell lines up beautifully.
Air temperatures average a mild 17.6°C (min 0.7°C, max 28.8°C), water is a crisp 21.5°C, and rainfall is moderate at 2.28 mm/day. The combination of cool air, warm water and winter swell makes January one of the most reliable months to plan a chase.
Average Spot conditions at Sebastian Inlet in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Sebastian Inlet during January. 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 January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sebastian Inlet for January. 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.