13th Beach - surf spot statistics

13th Beach in Australia offers consistent swell year-round, with ground swell dominating (80-94% of days) and minimal wind swell interference. The best months for surfers are typically from March to October, when ground swell probability peaks (88-94%) and average swell size increases slightly to 1.3-1.4m. Wind conditions, however, remain challenging, with bad onshore winds prevalent (69-78% of days). The most favorable wind windows appear in autumn and winter (April to September), where good offshore winds reach 26-31%—still not ideal but better than summer. May stands out with 93% ground swell and 31% good wind days, making it one of the more reliable months despite the persistent wind issues. Summer (December-February) is less consistent, with smaller swells (1.2m) and the worst wind conditions (83% bad). While 13th Beach rarely has flat spells (0-2% no-swell days), surfers should prioritize sessions during autumn and winter for cleaner, more powerful waves, accepting that wind quality remains a limiting factor.

December at 13th Beach offers fairly consistent surf, though conditions can be hit or miss for surfers. The average swell height is 1.2m with a solid 11.9s period, providing relatively clean and well-spaced waves. The dominant swells come from the SSW (24.55% in the 1-1.5m range) and SW (11.34% in the 1-1.5m range), which align best with the beach’s orientation. Smaller swells from the S and SE contribute occasionally but are less consistent. Wind conditions are where things get tricky—only 17% of the time is the wind ideal for surfing. The most problematic winds come from the SSE, S, and SSW at 10-30kph, which can create choppy or cross-shore conditions. Lighter winds from the ENE and NE are rare but favorable when present. Overall, December delivers decent waves, but surfers will need patience for those clean, offshore wind windows. Expect a mix of waist-high to occasional overhead waves, with the best chances early in the morning before winds pick up.