For those seeking consistent clean waves at Castles Beach, the optimal time is during the winter season, especially in November. During this period, rideable swells accompanied by light or offshore winds are common, offering ideal surfing conditions. In November, clean surfable waves are typically present 5% of the time, while 44% of the time, conditions may be unfavorable due to strong winds. However, for the remaining 51% of the time, waves may be considered too small for experienced surfers, yet suitable for beginners and young surfers (groms) on occasion.