Auckland is packing a lot into one weekend. Tāmaki Makaurau's events line-up spans 250 Porsches on the waterfront, a Bizet opera with a modern twist, an inner-city art crawl, and an expo where a performing pig is a headline act.

The marquee draw for many will be at the Viaduct Event Centre on Sunday: a free public celebration marking 50 years of Porsche in New Zealand. Roughly 250 Porsches will drive into the city and gather at the Viaduct between 11am and 2pm. Visitors can see the legendary Porsche 917 Museum racer and a special 911 GT3 Anniversary car, browse official gear at an on-site shop, and let the kids loose on competitions while the coffee (free) flows. It's a rare chance to see this scale of Porsche community in the middle of the waterfront.

Culture lovers have two strong picks. St Matthew's-in-the-City hosts the St Matthew's Chamber Orchestra for "Inspired by Mozart", with pianist Tony Chen Lin playing the Piano Concerto No. 20 and the Paris Symphony, plus a new commissioned work by Bjorn Arnsten and Stravinsky's Pulcinella Suite — and complimentary post-concert drinks courtesy of Villa Maria. From Wednesday, NZ Opera brings Georges Bizet's The Pearl Fishers to the Kiri Te Kanawa Theatre for a short run before it moves to Christchurch's Isaac Theatre Royal. Stephen Barlow's production relocates the tale of love and betrayal to an exclusive resort tied to a jewellery house called Pêcheur & Perle, starring Madison Nonoa, Filipe Manu, Phillip Rhodes and Anthony Robin Schneider.

Karangahape Road hosts its first Art Weekend, turning the country's densest strip of contemporary galleries into one connected precinct with late-night openings, artist talks, studio visits, tours and live music. South of the city, Pukekohe's Franklin Arts Festival — now 36 years old — runs at the Franklin Arts Centre until 26 September, showing hundreds of works with koha entry and daily hours of 9.30am to 4.30pm.

Animal fans get the Auckland Pet & Animal Expo at the Auckland Showgrounds, a two-day event in its 13th year reflecting the fact that 63% of Kiwi households have a pet. Expect breeders, rescue groups, kunekune pigs, reptiles and the Heritage Sheep Shearing Show — though note visitors can't bring their own animals.

Theatre picks: Prayas Theatre, Aotearoa's largest South-Asian company, opens Nimish Tanna's comedy Mama Moo at TAPAC, about a widowed butcher haunted by a cow's ghost; and the final weekend of Pork and Poll Taxes at the Herald Theatre, Talia Pua's tragedy about Chinese market gardeners during the poll tax era, returning five years after a sold-out premiere.

Further out, the calendar holds Cabaret at ASB Waterfront Theatre (22 September-18 October), the Chocolate & Coffee Festival at the Viaduct (26-27 September), the Wiggles nationally in October, Jesus Christ Superstar at The Civic from 22 October, and NZ Opera's The Pearl Fishers in Christchurch, 14-18 October. Wellington also gets the Verb Readers & Writers Festival, 25-27 September.

For travellers already in New Zealand — or weighing a trip — this is a good snapshot of how much culture the city packs into a single weekend, much of it free or low-cost.