Werri Beach • Statistics for September

September: Early Spring Energy Meets Southern Ocean Power

September is a transition month, but one that still delivers plenty of quality at Werri. The average swell height remains around 5ft (1.6m), and the average period drops a bit to 8.8s as the ocean begins recombining long-period winter groundswell with the first spring NE/ENE windswells. The S/SSE source is still strong - S and SSE each sit at 16% or more - while NE rebounds to 12.3% and the E/ESE window contributes about 24% combined. This means there is usually a mix of old Southern Ocean energy and newer, shorter-period E/NE swell. Winds are still good: the offshore W-WNW-NW quadrant accounts for about 39% of readings, and ideal conditions are present 56% of the time. Early season late-season lows can also produce excellent E/SE swell if they stall in the Tasman, though those systems often bring onshore winds that degrade the shape. Water temperature starts to climb from winter's bottom at 17.2°C, air temperatures reach 12.8°C, and rainfall is low at 1.83mm/day. With a little luck, September offers some of the best all-around surf of the year.