Moderate S/SW swells ahead of an oversized S/SW swell next week
Java, Bali, Lombok, Sumbawa forecast by Craig Brokensha (issued Tuesday 21st June)
Best Days: Thursday onwards, experienced surfers only later Monday/Tuesday
This week and next (Jun 22 – Jul 1)
We're currently between swells with small background energy breaking across the coast.
Small waves will continue through tomorrow with exposed breaks the only option for a surf, tiny to flat elsewhere.
Our moderate pulses of S/SW groundswell due from Thursday through the weekend are still on track, with Saturday's being the strongest.
Thursday's pulse doesn't look to offer any major size with swell magnets due to build to an inconsistent 3-5ft on the sets, easing back from a similar size Friday morning.
Saturday's swell which may be seen later Friday was generated by a vigorous polar low firing up in the Heard Island region over the weekend, generating a fetch of severe-gale W'ly winds on the edge of our southern swell window.
A moderate sized and long-period S/SW groundswell is due off this low, arriving later Friday and peaking Saturday morning to the 5-6ft+ range across exposed breaks. A slow drop in size is due from the afternoon, further into Sunday and Monday.
Looking at the winds over the coming days, and weak E/SE trades are due tomorrow and Thursday, strengthening from Friday into the weekend before easing again Monday and tending variable Tuesday. It's also worth remembering that winds each morning should be variable and locally offshore during this period.
As touched on last update, a large S/SW groundswell possible for Monday/Tuesday is on track. In fact it looks like another belter, with a very intense polar low due to form in the Heard Island region tomorrow afternoon/evening.
This low will project a fetch of severe-gale to storm-force SW winds slowly up towards Western Australia in a 'captured fetch' motion before pushing further east while weakening under the state Saturday.
The slow moving nature and sustained winds between 40-50kts will help generate an oversized and strong long-period S/SW groundswell that looks better than the swell that was due to impact a couple of weeks ago, but failed to reach its full potential.
The swell is due to be fairly consistent due to the favourable projection towards us, with it arriving very strongly later Monday, kicking to 6-8ft by dark and peaking early Tuesday to an easy 10ft+ across exposed breaks. As touched on above winds will be more variable Tuesday so the reefs might not be lining up as perfect as they could be.
The swell will ease from the afternoon, into Wednesday, with a possible reinforcing pulse for Thursday, but we'll review this in the next update.