Daily forecasts are free. If you want a longer forecast period then you will need to subscribe.
In this weather site you can customise what you want to see. Choose from hour by hour, weekend, 10 day outlooks etc. NB. The forecast area is for Auckland Airport and as such should be used as a general indication only.
The Metservice forecast for Auckland Harbour and the Hauraki Gulf.
Take a look at this site to see what the wind is doing in our area. Select the region you want to look at from the map of NZ on the left of the page. NB. Take note of the last update time. The data can be several hours old sometimes.
Windguru will give wind and wave height forecasts for the Takapuna area.
This link will take you to the LINZ website for tidal information for major & secondary NZ ports. Type in the port & month you wish to view & click on the "submit" button. These charts are not adjusted for daylight savings time.
SwellMap 24 hour forecast. This site gives you information about many different locations around the Gulf. Click on "Marine" button and select the location you wish to view. I.e. Inner Gulf.