Shipwreck Bay - surf spot statistics

Shipwreck Bay in New Zealand is a consistent year-round surf spot, predominantly powered by ground swells, which dominate the swell mix nearly every month with percentages rarely dropping below 84%. The swell size averages around 1.5m to 2.2m, peaking in July and August at 2.2m, making these months ideal for surfers seeking larger waves. However, the biggest challenge here is wind conditions, which are frequently unfavorable, particularly from February through December, with bad wind conditions occurring over 60% of the time. The best wind conditions, though still relatively low, are found in January (38% good winds), making it the most promising month for clean surf. December has the highest proportion of wind swell (16%), which can create less ideal, choppier waves. If you prioritize wave consistency, the winter months (June-August) offer the biggest swells, but expect strong offshore winds to be rare. For more manageable conditions, late summer (January-March) provides slightly better wind odds while still maintaining solid swell activity. Ultimately, Shipwreck Bay delivers waves year-round, but surfers must contend with challenging winds outside of the January window.

December at Shipwreck Bay offers consistent, surfable conditions with an average swell height of **1.6m** and a solid **13.1s period**, indicating powerful, well-spaced waves. The swell is predominantly from the **SW (59%)** and **WSW (14%)**, with the best waves forming in the **1.5-2m** range (15% SW, 4.5% WSW) and overhead **2-2.5m** waves occurring occasionally (8.8% SW, 3.6% WSW). Smaller days (1-1.5m) are frequent (23.9% SW, 7.5% WSW), while clean-up sets over 2.5m are rare (0.5% SW). Wind conditions are surfable **22% of the time**, often compromised by northerlies (N/NNE/NE) at 10-30kph (9.4% combined) or strong southerlies (S/SSW at 20-40kph, 18.4%). The best scenario is lighter SW-W winds (5.5% under 20kph), but expect variable breezes. Overall, December delivers reliable mid-sized waves with workable wind windows—ideal for experienced surfers, especially when SW swells align with lighter offshore winds.