Boaties are being warned of large swell conditions off the Gisborne-Mahia coast over the next few days.
The wave warning is for the area from Mahanga to Potikirua Point.
For the Portland Island marine area MetService has put out a gale and a swell warning for today through to Thursday.
The forecast is for rough seas, with strong south-west winds on Wednesday, when the south-west swell is expected to peak at around 4.5 metres off the Tuahine Rise by 4pm that afternoon.
Conditions should ease over Thursday becoming moderate by evening.