Some mates and I used to into windsurf wave sailing and the Taranaki coast has some epic spots.
From the days of camping at Weld Road then staying at the Wave Haven, we ended up buying a place in Opunake and a lot of the time there is wind but when it wasn't windy enough did a lot more surfing and became an ok surfer but there are so many locations that you didn't have to surf crowded spots.
There are few sandy beaches or as locals say "large grains of sand" - ROCKS! So mainly reef breaks. Ended up getting a jet ski and doing tow in but there are some breaks where its too long to prone paddle but a longer sup to paddle a km out the back.
Sold that place over 20 years ago but so many memories of good waves. I always remember this time of year as the best for surfing, maybe not 3m swell but higher chance of offshore and clean waves.
October you could be lucky but our spring frontal system will normally be nw to sw wind direction so better around Okura - New Plymouth. Surfers would be up early before the wind comes up.
Shippies - yeah been surfing there and the island is relatively thin to give you more options.
Had this guy studying reef breaks and remember him saying parts of South Island had great surf breaks but.
Good Luck