G-Land (Grajagan) Alert Guide
Java, Indonesia · part of the G-Land (Grajagan) spot guide
G-Land is forecast-only — the nearest buoy is thousands of kilometres away — so it is model-driven, and the height below is an open-ocean reading that the reef amplifies on the face.
The forecaster's checklist
- 1.Track a deep Roaring Forties low across the southern Indian Ocean — the same storms that light Uluwatu, aimed at Java’s southeast tip.
- 2.Want southwest, around 200–240°, on period of 14 seconds and up.
- 3.Give it three to six days of travel and run on models — there is no near buoy — using GFS-Wave via Windy plus Surfline.
- 4.Surf the dry-season southeast-trade offshore, and time the reef to a mid tide; low is dangerous over Speed Reef.
- 5.The tell is a long-period southwest swell in the dry season with the trades offshore and enough water over the reef.
Local winds & tide
Best wind: SE–E offshore (the dry-season trades) — from 90° to 160° (E–SSE).
Tide-critical though no tide series is modelled: a mid tide is best, and low is dangerous on the shallow Speed Reef.
Dial it in
The dial-up: alert settings that catch it
When ALL of these line up in the 5-day forecast window, this spot is turning on.
- Open-ocean swell height
- ≥ 5 ft
- Swell period
- ≥ 14 s
- Swell direction (from)
- 160°–250° (SSE–WSW)
- Wind direction (from)
- 90°–160° (E–SSE)
No representative buoy on this coast — read these numbers against the 16-day spot forecast instead.