Lagundri Bay Swell Window
Nias, Indonesia · part of the Lagundri Bay spot guide
- Swell window (from)
- 140°–240° (SE–WSW)
- Best direction
- ~200° (SSW)
- Period sweet spot
- 14–18 s
- Open-ocean height (Hs)
- 3–10 ft
- Resulting faces
- 3–15 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.
The bay opens to the south, so The Point feeds on energy from the southeast through south-southwest, with the sweet spot squarely south to southwest where the reef taper is best aligned. Period is the single biggest quality gate: it wants long groundswell of roughly 14-to-18 seconds, and short-period wind-swell shows up mushy and disorganised no matter the height.
Because the reef step is deep-fronted and closely angled to the swell, the breaking face runs roughly one-and-a-half to two times the open-ocean height on the best long-period days — a much smaller model reading than the tube you see. Read the alert threshold as open-ocean height.