Java, Bali, Lombok, Sumbawa forecast by Craig Brokensha (issued Tue 7th Oct)

Best Days: Wednesday, Thursday, Friday and Saturday mornings at exposed spots, later Sunday, Monday and Tuesday

This week and weekend (Oct 8 - 12)

A kick in S/SW swell was seen yesterday providing a bit more size across the region, but this has backed off a touch into today with favourable winds.

We should see a new medium-range S/SW groundswell filling in tomorrow and reaching just over the 6ft range at exposed spots through the afternoon before dipping away slowly through Thursday and further into the end of the week.

Winds will become a little funky into Friday and Saturday as E/SE trades back off and more variable breezes with a touch of west in them develop across the region. This should favour exposed breaks through the mornings as the swell bottoms out to an inconsistent 3-4ft+.

Sunday will start out slow but a new long-range and very inconsistent SW groundswell should arrive later in the day ahead of a much more solid kick of S/SW swell into Monday and Tuesday, discussed in more detail below.

Next week onwards (Oct 13 onwards)

As touched on the last few updates a large S/SW groundswell due into the start of the week starting the 13th is shaping up nicely.

Already a vigorous polar storm firing up south-east of South Africa has set in motion a strong long-period SW groundswell, but by the time it arrives across our coast there isn't expected to be any major size. This is the swell responsible for Sunday afternoon's kick in size, with exposed spots likely to reach the very inconsistent 4-6ft at exposed spots later in the day.

Into Monday though, a more consistent and larger S/SW swell should fill in, generated by a broad fetch of severe-gale W/SW winds firing up on top of an active sea state from pre-frontal W/NW gales just ahead of it.

This should produce a large S/SW groundswell for Monday afternoon, reaching 8-10ft at exposed spots in Bali before easing from a similar size Tuesday morning.

Winds at this stage look good with variable breezes during the morning at selected locations before moderate to fresh E/SE trades kick in.

From here on there's nothing too major on the cards, but we'll review this Thursday.

16 day Bali Forecast Graph
16 day East Java Forecast Graph
16 day Sumbawa Forecast Graph