Models are still struggling to resolve this trough but there are reasonable grounds to suggest the trough may deepen and form a surface low in the Tasman late next week.

Multiple swell sources and pulses are due this period, most consistent Monday.

The coming period won't go flat but the energy will be small and west in nature.

Surf should ease early next week but another blocking dual-centred high in the Tasman next week looks to re-strengthen tradewinds in the Coral Sea with wave heights increasing later next week.