Geomorphology

2006-07-18T17:42:00.000-07:00

The south coast of Java faces the Indian Ocean, so it is exposed to large swells generated by low pressure systems circling Antarctica, many thousands of kilometers to the south. G-Land is situated on the eastern side of the Bay of Grajagan, so it has a westerly aspect; i.e. at rightangles to the predominant swell direction. As a result, swell wraps around the point and into the eastern side of the bay, producing long, walling left-handers, which peel at a rapid rate along a half kilometer stretch of shallow coral reef, forming perfectly hollow tubes that remain open the whole way.

G-Land is offshore between the months of April and September, which also happens to be when the swells are at their largest and most consistent. Since the swells are generated by low pressure systems circling Antarctica, their regularity coincides with the passage of these lows. So, the swell arrive in pulses, each lasting for a couple of days, with a couple of days between each swell.

Waves tend to be bigger and better at high tide, so it's best to plan a surf trip for the week following a full or new moon, since this is when the tide is high during the middle of the day.

>> Satellite image.