St Ives - surf spot statistics

St Ives in the United Kingdom offers surfable conditions year-round, but the best months for quality waves and favorable winds are typically from late autumn through early spring, particularly November to February. During these months, ground swell dominates (65-82%), providing more consistent and powerful waves with mean swell sizes ranging from 2.0m to 2.4m. However, wind conditions are often challenging, with bad onshore winds prevailing 88-91% of the time, which can make sessions messy. The prime window is likely December to February when ground swell percentages peak, but surfers must be prepared for strong winds. Spring (April-June) and summer (July-August) see a significant drop in ground swell activity, replaced by wind swell (42-77%) and smaller waves (1.1-1.4m). While wind conditions improve slightly (15-17% good winds), the lack of consistent ground swell makes sessions weaker and less reliable. September and October mark a transitional period, with ground swell increasing again (37-53%) and better wave energy returning (1.3-1.7m). For surfers seeking cleaner conditions, these shoulder months might offer occasional good days, though wind remains a limiting factor. Overall, winter delivers the most powerful waves, but patience is required to score optimal wind alignment.

December in St Ives offers decent surf conditions, though it can be somewhat inconsistent and heavily dependent on swell and wind direction. The average swell height is 2.2m with an 11.9s period, providing enough power for intermediate to advanced surfers, especially when the waves align properly. The most dominant swell directions come from the W and WNW, which often produce waves in the 1.5-2.5m range, with a notable percentage of larger swells (over 2.5m) also arriving from the W and WSW. These westerly swells can create powerful, well-formed waves when conditions align, but wind is a key limiting factor. Winds in December are frequently from the southwest to west, which can be onshore or cross-shore, leading to choppier conditions. Only about 10% of the time does the wind align ideally for clean surf (likely light offshore or side-offshore winds from E or NE). Stronger winds (20-50kph) are common, particularly from SW and WSW, which can degrade wave quality. Surfers will need to keep an eye on wind forecasts and prioritize sessions when winds are lighter or more favorable. Overall, December can deliver solid waves, but patience and timing are key due to the variability in wind and swell direction.