Caswell Beach - surf spot statistics

Caswell Beach in the UK offers surf conditions that vary significantly throughout the year, with the best surfing months typically being during autumn and winter. The data shows that from October to February, the swell quality and size are more favorable for surfers, with ground swell percentages peaking in December (43%) and January (49%). These months also have larger mean swell sizes, averaging 1.0–1.2 meters, which is more suitable for intermediate and advanced surfers. Wind conditions, however, are consistently poor throughout the year, with bad wind conditions dominating 89–93% of the time, making clean surf sessions rare. The worst months for surfing are from May to September, when ground swells drop sharply (2–10%), and swell sizes diminish to 0.6–0.7 meters, often resulting in weak, wind-affected waves. Wind swells become more dominant during this period, but they provide less consistent and lower-quality surf. Overall, the prime window for good waves at Caswell Beach is late autumn through early winter, particularly November to January, when ground swells are more frequent and wave heights are more substantial—despite the challenging wind conditions that require careful timing for the best sessions.

December at Caswell Beach offers mixed but occasionally surfable conditions. The average swell height is 1.2m with a decent period of 10.1s, suggesting some energy in the waves. The dominant swell directions come from WSW (32% of waves in the 0.5-1.5m range) and SW (14% of waves in the 1-2.5m range), which typically produce cleaner, more organized waves for this spot. These swells generate rideable conditions, especially when combining mid-range heights (1-2m) with the longer period. However, wind conditions are less favorable—only 9% of the time does the wind align ideally for surfing. The prevailing winds are often from the W to SW sectors, which can create onshore chop, particularly at higher speeds (20-50kph). While larger swells (2m+) are rare (under 6% of the time), December can still deliver decent sessions when WSW swells coincide with lighter winds or offshore breezes from the N-NE quadrant. Patience and timing are key, as the best conditions will depend on short-lived windows of clean wind alignment.