An inland trough eventually clears the coast later Tues or Wed and the broad E’ly infeed into the trough transforms a typical but out of season tradewind fetch into a more broadscale “trough block” feature which will send swell to most of the Eastern Seaboard.

A low in the Tasman is moving north with a slingshot fetch of S-SE winds expected to rebuild wave heights from the S-SE later today and into tomorrow while a trough of low pressure in the Coral Sea is sending more E’ly angled swell into the sub-tropical Points. The combination of low and high pressure is maintain a firm ridge along the eastern seaboard with plenty of S-SE wind. 

 Late afternoon is on target for a sneaky long range/long period pulse of southerly groundswell, sourced from a tight but intense polar low skirting the ice shelf this weekend.

The Tasman Sea, by contrast, is looking very mellow with a weak high pressure cell over NSW and a few decaying remnants of the long lasting Tasman Low sitting near New Zealand. Those weak pressure gradients across our main S-SE swell window will lead to a very quiet week swell wise, with mostly offshore winds.