Java, Bali, Lombok, Sumbawa forecast by Craig Brokensha (issued Thursday 9th April)

Best Days: Every day exposed breaks, and then from Friday week for bigger surf

This weekend and next week (Apr 10 - 17)

Fun levels of inconsistent S/SW groundswell have keep exposed breaks topped up with good waves yesterday and today, with a similar sized pulse due tomorrow to an infrequent 3-5ft before easing through the weekend.

Into next week there's nothing major due until Friday with background levels of inconsistent SW groundswell due to keep 3ft+ waves hitting swell magnets. Winds will remain favourable and light offshore early with weak E/SE trades into the afternoons.

Friday however will see the arrival of a strong and powerful long-period S/SW groundswell, generated through the southern Indian Ocean. This will be the result of a strong node of the Long Wave Trough moving through the southern Indian Ocean, projecting two vigorous polar lows through our swell window. The first system will develop south-east of South Africa and generate a fetch of severe-gale to storm-force W/SW winds while tracking towards WA.

A secondary strong system will then fire up on the tail of the original low, generating a secondary strong S/SW groundswell for later Saturday and Sunday.

Size wise we should see large 6-8ft+ waves at exposed breaks through Friday, dropping a touch Saturday and then kicking back to a similar size Sunday. Winds look great with variable morning breezes and fresh afternoon E/SE trades.

Longer term the outlook remains active into the following week, but more on this Tuesday.

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