The high initially weakens with a lighter onshore flow before re-strengthening as it approaches New Zealand and has the pressure gradient tightened on the western flank by the complex trough systems. That will produce a N’ly flow, expected to increase as the week goes on with increasing NE windswell late in the week and early weekend.

There'll be windows of surf across both regions but with generally small surf as troughy weather dominates. More size is due from Sunday but with deteriorating winds.

Once the tradewind flow sets up early next week as the blocking high enters the Tasman we should start to see an increase in tradewind swell, likely by Tues at the latest.

Surf options remain minimal for the period, while a better swell for late next week looks to be met with onshore winds.