Llangennith - surf spot statistics

Llangennith in the UK offers varied surf conditions throughout the year, with the best months generally being autumn and winter when ground swells dominate and wave quality improves. From January to February, ground swells are most frequent (around 52-53%), with mean swell sizes around 1.3-1.4m. However, wind conditions are poor (87-89% unfavorable), often creating choppy surf. March sees a slight drop in ground swells (40%) and smaller waves (1.1m), maintaining challenging winds. Spring (April-June) brings weaker conditions, with ground swells dropping significantly (8-24%) and wind swells taking over. Swell size averages a modest 0.7-0.8m, and wind quality remains poor (87-91% unfavorable). Summer (July-August) is the least favorable, with minimal ground swells (3%), tiny waves (0.7m), and very poor winds (95% unfavorable). September marks a transition, with a slight uptick in ground swells (11%) but still subpar winds. October-December sees improving conditions, with ground swells increasing (23-46%), swell sizes growing (1.1-1.3m), though wind quality remains an issue (90% unfavorable). The prime window for surfers is late autumn to early winter (October-December), when ground swells return and wave heights increase, despite persistent wind challenges. January-February also provides solid swells but similarly tricky winds. For the cleanest and most powerful waves, advanced surfers should target the winter months, while summer offers only small, wind-affected conditions suitable for beginners or longboarders.

December at Llangennith offers varied but generally favorable conditions for surfers, with an average swell height of 1.3m and a strong average period of 10.1s, suggesting well-formed and powerful waves. The best swells come from the SW to WSW directions, accounting for the majority of waves in the 1-2.5m range, with WSW producing the most consistent quality (10-15% of days seeing 1.5m+ waves). Cross-shore winds from the W/SW quadrants are most common, but only 11% of days have ideal, light offshore winds (typically ENE to E). However, strong onshore winds (20-40kph) from the SW/W occur frequently, which can create choppy conditions. Smaller, weaker swells (0.5-1m) are prevalent from E/ESE, but these are less surfable. Winter storms occasionally push swell heights above 2.5m (rare, <0.5% of days), primarily from SW/WSW. Expect a mix of rideable days—cleaner sessions are rarer but possible when high-pressure systems bring lighter E/NE winds. Pack a thicker wetsuit and be prepared for variable wind/swell interplay, prioritizing SW swell days with lighter winds for the best surf.