A strong succession of fronts and lows will march from Madagascar through to WA longitudes, each working on the pre-existing active sea state from the last system, generating successively bigger swells for the region. 

Fortunately, high pressure will move in and rapidly ease local winds, so apart from some lingering lumpiness, we should see rapidly improving conditions across all coasts (more quickly on the Mid than down south, mind).

Big, slow moving high in the Tasman next week will slowly migrate towards New Zealand, holding a broad fetch of E’ly winds across the Coral Sea, South Pacific slot and into the Northern Tasman. 

The Eastern seaboard is in between two large highs at the moment with a system near New Zealand still generating surf via a tradewind fetch and a new system moving through the Bight about to replicate it.