Pipeline Swell Window
Hawaii, USA · part of the Pipeline spot guide
- Swell window (from)
- 285°–40° (WNW–NE)
- Best direction
- ~305° (NW)
- Period sweet spot
- 14–18 s
- Open-ocean height (Hs)
- 4–9 ft
- Resulting faces
- 6–18 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.
Pipe accepts energy from WNW through NW to N, because the offshore platform refracts a wide slice of the NW quadrant into the peak. The best classic Pipeline left comes on a WNW swell around 290–330°; a more northerly, shorter-period angle favors the Backdoor right. Period is the tell — 16 seconds and up is what makes Pipe barrel, while a shorter 10–14-second NW pulse opens A-frames and Backdoor walls.
The height a swell reads at the Waimea buoy is not the height you ride: breaking faces at Pipe run roughly double the buoy significant height and grow with period. A classic 4–8 ft reading at the buoy with a long period translates to hollow, overhead-plus faces on First Reef; push past about 12 ft of face and Second Reef starts to feather outside.