The amazing people at the Waikuku Beach Surf Lifesaving Club pointed me to this incredible resource: safeswim.org.nz
You can find the updated patrolling times for any beach in New Zealand, plus tidal information and live water quality reports in some cases.
Just browse the interactive map or use the search option in the top right corner. If you're on your phone, you can bookmark direct links to your favourite local spots like Woodend, Waikuku, and Pegasus beaches.
Full map: safeswim.org.nz
Waikuku Beach: safeswim.org.nz/locations/waikuku-beach
Pegasus Beach: safeswim.org.nz/locations/pegasus-beach
Woodend Beach: safeswim.org.nz/locations/woodend-beach