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Conditions at Oceanside in January
January: Winter Groundswell at Peak Form
January is the cleanest and most consistent month of the year at Oceanside. Average swell height is 1.0m (about 3.3ft), but the direction mix is excellent: W swells dominate at 62.8%, WSW adds 25.2%, and SW contributes another 6.8%. In the W window, 22.3% of waves arrive in the 3-5ft (1-1.5m) range, with 5.2% running 5-6.5ft (1.5-2m) and nearly 1% pushing 6.5-8ft (2-2.5m). With an average period of 12.6s, this is proper long-period groundswell from North Pacific storms, not wind chop.
The wind outlook is also about as good as it gets. Ideal surfing wind is reported 52% of the time, and the undesirable SW-to-W onshore flow is limited. Mornings frequently feature light NNE/NE flow that grooms the lines before any afternoon breeze kicks in. Water temperature sits at 14.4°C (57.9°F), so a 4/3mm wetsuit is standard gear. January is the month to cash in on Oceanside's winter potential.
Average Spot conditions at Oceanside in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Oceanside 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 Oceanside for your next trip in January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Oceanside 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 Oceanside.