Java, Bali, Lombok, Sumbawa forecast by Guy Dixon (issued Friday 20th May)

This weekend (Saturday 21st - Sunday 22nd) and next week (Monday 23rd onward):

The surf will gradually fade following today’s pulse, with sets gradually easing from the 6ft range on Saturday.

A slight period pulse into Sunday is not expected to provide a significant increase in size, but instead maintain sets in the 6ft range for most of the day, preceding a stronger pulse due on Monday.

A light/moderate easterly trade flow is expected to persist throughout Saturday, easing marginally and tending more southeasterly.

We have been monitoring a strong frontal progression which has been pushing up from the Heard Island region with good alignment to WA’s South West. South/southwesterly core winds of 35-45kts have been surging northward throughout today generating swell for WA, but energy will also continue northward towards Indonesia by early next week.

The long range forerunners off this system are due to fill in on Monday morning, with the bulk of the size expected late in the day. Solid sets are forecast to build to the 10-12ft range by the late afternoon, holding at a similar size into Tuesday morning.

With no significant energy immediately following this swell front, we can expect a steady easing trend in the days following. Sets should ease from around 8ft on Wednesday, more so from the 4-6ft range on Thursday.

A moderate east/southeasterly trade flow should dominate for the majority of the week.

The next best pulse is due from Thursday into Friday steered by very similar system. More detail next week.

16 day Bali Forecast Graph 

16 day East Java Forecast Graph

16 day Sumbawa Forecast Graph