Middleton - surf spot statistics

Middleton, Australia, offers consistent surf conditions year-round, with ground swell dominating over wind swell in every month. The best time to surf here is during the autumn and winter months (April to September), when ground swell percentages peak above 90% and mean swell sizes range from 1.5m to 1.7m. Wind conditions improve significantly during this period, with good wind days occurring 29-34% of the time—far more favorable than summer months, where onshore winds are prevalent (bad wind conditions above 80% from December to March). The largest swells arrive from May to September, with August and September seeing the biggest waves (1.7m). While summer (December-February) still provides rideable swells (1.4m), the high frequency of poor wind conditions (over 85%) makes it less ideal. March and October serve as transitional months, offering decent ground swell but less reliable winds. For surfers seeking optimal conditions—solid, clean waves with minimal wind interference—the window from April to September is the prime season at Middleton.

September at Middleton offers solid surf conditions with a dominant swell from the SSW direction, which is ideal for this spot. The average swell height of 1.7m combined with a healthy 13.6s period ensures well-spaced, powerful waves. Most swells fall in the 1-2.5m range (peaking between 1-2m), providing consistent overhead sets, while larger days over 2.5m are rare. Winds are a mixed bag—only 29% of the time are they truly favorable (light offshore or sideshore), but when they align, conditions are excellent. The predominant wind directions (W to SSW) often bring onshore flow, which can create choppier surfaces, particularly in the 10-30kph range. Expect the best sessions when winds are lighter or from the NW quadrant. Overall, September delivers reliable surf with a mix of quality and challenging days, requiring patience for optimal windows.