Conditions at Gruissan in January
January: Midwinter Swell Windows
January is one of Gruissan's best bets, with average surf heights around 3-4ft (0.9-1.2m) and periods near 5.3s. The wave rose is still dominated by WNW/NW windsea from the Tramontane, but those directions are offshore here and rarely produce clean, surfable lines. What matters is the E/ESE/SE/SSE energy: together these directions make up about 24% of observations, with some solid 3-8ft (1-2.5m) waves on the books. Offshore flow from the W/WNW/NW quadrant is frequent and often strong, which is why ideal surfable wind windows sit at 26%. The trick is finding that short overlap after a low-pressure system passes, when E/SE swell arrives and a lighter NW offshore cleans it up. Water temperature is a chilly 12.5°C, air temps average 8.0°C, and precipitation runs 1.72 mm/day, so winter rubber is essential.
Average Spot conditions at Gruissan in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Gruissan 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 Gruissan for your next trip in January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Gruissan 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 Gruissan.