| Ōkahu Bay Beach | Auckland | Fiji Sea | 14.3°C(57.7°F) | January, February, March, April | Live SST → |
| Okoka (Dead Dog) Bay | New Zealand | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Okupe Beach | Northland | Fiji Sea | 15.8°C(60.4°F) | January, February, March, April | Live SST → |
| Okurekureia Beach | Northland | Fiji Sea | 15.8°C(60.4°F) | January, February, March, April | Live SST → |
| Old Ōpōtiki Harbour Entrance | Bay of Plenty | Fiji Sea | 14.7°C(58.5°F) | January, February, March, April | Live SST → |
| Ōmaha Beach | Auckland | Fiji Sea | 14.5°C(58.1°F) | January, February, March, April | Live SST → |
| Ōmana Beach | Auckland | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Ōmanu Beach | Bay of Plenty | Fiji Sea | 14.7°C(58.5°F) | January, February, March, April | Live SST → |
| Onehorahia | New Zealand | Fiji Sea | 14.3°C(57.7°F) | January, February, March, April | Live SST → |
| Onekakara | Otago | Tasman Sea | 10.7°C(51.3°F) | January, February, March, December | Live SST → |
| Oneraki Beach | Kermadec Islands | Fiji Sea | 18.9°C(66°F) | January, February, March, April, December | Live SST → |
| Oneroa Beach | Auckland | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Onetahuti | Tasman District | Tasman Sea | 12.9°C(55.2°F) | January, February, March, December | Live SST → |
| Onetangi Beach | Auckland | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Ōpito Beach | New Zealand | Fiji Sea | 15.1°C(59.2°F) | January, February, March, April | Live SST → |
| Ōpoutama Beach | Hawke's Bay | Coastal Waters | 13.6°C(56.5°F) | January, February, March, April | Live SST → |
| Ōpoutere Beach | Waikato | Fiji Sea | 15.2°C(59.4°F) | January, February, March, April | Live SST → |
| Ōraka Beach | Hawke's Bay | Coastal Waters | 13.6°C(56.5°F) | January, February, March, April | Live SST → |
| Ōrere Point Beach | Auckland | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Ōreti Beach | New Zealand | Tasman Sea | 11.1°C(52°F) | January, February, March, December | Live SST → |
| Ōrewa Beach | Auckland | Fiji Sea | 14.5°C(58.1°F) | January, February, March, April | Live SST → |
| Oriental Beach | Wellington | Tasman Sea | 12.6°C(54.7°F) | January, February, March, December | Live SST → |
| Orongo Beach | Gisborne District | Coastal Waters | 13.6°C(56.5°F) | January, February, March, April | Live SST → |
| Orpheus Bay | Auckland | Tasman Sea | 14.4°C(57.9°F) | January, February, March, April | Live SST → |
| Orua Beach | Northland | Fiji Sea | 16°C(60.8°F) | January, February, March, April | Live SST → |
| Ōtama Beach | Waikato | Fiji Sea | 15.1°C(59.2°F) | January, February, March, April | Live SST → |
| Ōtānerua / Hatfields Beach | Auckland | Fiji Sea | 14.5°C(58.1°F) | January, February, March, April | Live SST → |
| Otekiho Beach | Otago | Tasman Sea | 10.6°C(51.1°F) | January, February, March, December | Live SST → |
| Otūmoetai Beach | Bay of Plenty | Fiji Sea | 14.7°C(58.5°F) | January, February, March, April | Live SST → |
| Overtons Beach | Auckland | Fiji Sea | 15°C(59°F) | January, February, March, April | Live SST → |
| Owhanake Beach | New Zealand | Fiji Sea | 14.3°C(57.7°F) | January, February, March, April | Live SST → |
| Pacific Beach | Hawke's Bay | Tasman Sea | 13.4°C(56.1°F) | January, February, March, April | Live SST → |
| Paekakariki Beach | Wellington | Tasman Sea | 13.3°C(55.9°F) | January, February, March, April | Live SST → |
| Paengarēhia / Twilight Beach | Northland | Fiji Sea | 15.3°C(59.5°F) | January, February, March, April | Live SST → |
| Pākiri Beach | Auckland | Fiji Sea | 14.5°C(58.1°F) | January, February, March, April | Live SST → |
| Pakiroa Beach | West Coast | Tasman Sea | 13°C(55.4°F) | January, February, March, April | Live SST → |
| Palm Beach | Auckland | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Palmers Beach | Auckland | Fiji Sea | 15°C(59°F) | January, February, March, April | Live SST → |
| Pāpāmoa Beach | Bay of Plenty | Fiji Sea | 14.8°C(58.6°F) | January, February, March, April | Live SST → |
| Papanui Beach | Otago | Tasman Sea | 10.6°C(51.1°F) | January, February, March, December | Live SST → |
| Parauwanui Beach | Northland | Fiji Sea | 15.4°C(59.7°F) | January, February, March, April | Live SST → |
| Paremata Beach | Wellington | Tasman Sea | 12.9°C(55.2°F) | January, February, March, April | Live SST → |
| Paritutū Beach | Taranaki | Tasman Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Parutahi Beach | Northland | Fiji Sea | 15.8°C(60.4°F) | January, February, March, April | Live SST → |
| Pāua Beach | Southland | Tasman Sea | 11.1°C(52°F) | January, February, March, April | Live SST → |
| Pāuanui Beach | Waikato | Fiji Sea | 15.2°C(59.4°F) | January, February, March, April | Live SST → |
| Pebbly Beach | Chatham Islands Territory | Coastal Waters | 11.1°C(52°F) | January, February, March, April | Live SST → |
| Peka Peka Beach | Wellington | Tasman Sea | 13.3°C(55.9°F) | January, February, March, April | Live SST → |
| Penguin Beach | Otago | Tasman Sea | 10.6°C(51.1°F) | January, February, March, December | Live SST → |
| Pilots Beach | Otago | Tasman Sea | 10.6°C(51.1°F) | January, February, March, December | Live SST → |