Horseshoe • Statistics for September

September: The Autumn Reset

September is when the ocean starts waking up. The average swell height remains modest at 2-3ft (0.8m), but the period jumps to 9.5s and the swell mix becomes more varied and more promising. NE leads at 27.1%, ENE 22.7% and NNE 11.4%, while E contributes 8.8% and a fresh westerly component from W, WSW and WNW supplies additional energy. With 42% ideal wind - the highest of the entire year - Horseshoe often gets clean conditions to accompany the early-season swell pulse. This is the month when the combination of building NE swell and lingering SW-monsoon offshore winds starts to produce genuinely fun waves.

The wind distribution tells a beautiful story for this east-facing spot: W 16.4%, WSW 10.0%, WNW 8.6%, and NW 4.3% add up to a solid offshore regime. When a typhoon churns through the western Pacific or a monsoon trough shifts, it can deliver a bigger, longer-period swell, and the clean wind will be there to hold it up. Air temp is 28.0°C, water 29.5°C, and precipitation sits at 6.3mm/day. For surfers chasing quality per wave, September is one of the best kept secrets of the year at Horseshoe.