Dungeons Swell Window
Western Cape, South Africa · part of the Dungeons spot guide
- Swell window (from)
- 190°–290° (S–WNW)
- Best direction
- ~235° (SW)
- Period sweet spot
- 15–20 s
- Open-ocean height (Hs)
- 10–30 ft
- Resulting faces
- 12–45 ft
Open-ocean vs. the face: the heights on buoys and forecast models are significant wave height (Hs) in deep water. What you ride is the breaking face, which depends on period, direction and this break's bathymetry — that's why the two rows above differ. PierMonkey's spot ratings already do this conversion for you.
It needs big, long-period southwest groundswell — the productive window is roughly 190° to 290° with the southwest core near 235°, and a south lean favors the Slab and Outside Bowl while a west lean favors the inside. Period is decisive, 15 to 20 seconds, with a documented 19-second day among the best ever.
The height on a model is an open-ocean reading, and the faces run roughly double it: a threshold of about 3 m at 15 seconds gives 12-to-15-foot faces, a classic 4-to-5-metre swell gives 20-to-35-foot faces, and the XXL tow days come from 6 to 8 metres and up for 40-to-60-foot-plus faces.