| Karepiro Bay Beach | Auckland | Fiji Sea | 14.5°C(58.1°F) | January, February, March, April | Live SST → |
| Karewa Beach | Waikato | Tasman Sea | 14.2°C(57.6°F) | January, February, March, April | Live SST → |
| Karikari Beach | New Zealand | Fiji Sea | 15.6°C(60.1°F) | January, February, March, April | Live SST → |
| Karimoni Beach | Southland | Tasman Sea | 11.1°C(52°F) | January, February, March, April | Live SST → |
| Karioitahi Beach | Auckland | Tasman Sea | 14.4°C(57.9°F) | January, February, March, April | Live SST → |
| Kātiki Beach | Otago | Tasman Sea | 10.7°C(51.3°F) | January, February, March, December | Live SST → |
| Kawa | Otago | Tasman Sea | 10.7°C(51.3°F) | January, February, March, December | Live SST → |
| Kellys Beach | Auckland | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Kellys Beach | Southland | Tasman Sea | 11.1°C(52°F) | January, February, March, April | Live SST → |
| Kikipaku Beach | New Zealand | Fiji Sea | 16.1°C(61°F) | January, February, March, April | Live SST → |
| Kina Beach | Tasman District | Tasman Sea | 12.8°C(55°F) | January, February, March, December | Live SST → |
| Kiritehere Beach | Waikato | Tasman Sea | 14.1°C(57.4°F) | January, February, March, April | Live SST → |
| Kohimarama Beach | Auckland | Fiji Sea | 14.3°C(57.7°F) | January, February, March, April | Live SST → |
| Kohioawa Beach | Bay of Plenty | Fiji Sea | 14.6°C(58.3°F) | January, February, March, April | Live SST → |
| Kōura Beach | West Coast | Tasman Sea | 13.1°C(55.6°F) | January, February, March, April | Live SST → |
| Kowhai Beach | Northland | Fiji Sea | 15.3°C(59.5°F) | January, February, March, April | Live SST → |
| Kōwhai Beach | Auckland | Tasman Sea | 14.5°C(58.1°F) | January, February, March, April | Live SST → |
| Kūaotunu Beach | Waikato | Fiji Sea | 14.8°C(58.6°F) | January, February, March, April | Live SST → |
| Ladies Bay Beach | Auckland | Fiji Sea | 14.3°C(57.7°F) | January, February, March, April | Live SST → |
| Langs Beach | Northland | Fiji Sea | 14.8°C(58.6°F) | January, February, March, April | Live SST → |
| Lawyers Delight Beach | West Coast | Tasman Sea | 12.7°C(54.9°F) | January, February, March, April | Live SST → |
| Little Beach | Otago | Tasman Sea | 11°C(51.8°F) | January, February, March, April | Live SST → |
| Little Beach | West Coast | Tasman Sea | 13.1°C(55.6°F) | January, February, March, April | Live SST → |
| Little Bungaree Beach | Southland | Tasman Sea | 11.1°C(52°F) | January, February, March, April | Live SST → |
| Little Hellfire Beach | Southland | Tasman Sea | 11.7°C(53.1°F) | January, February, March, April | Live SST → |
| Little Kaiteriteri Beach | Tasman District | Tasman Sea | 12.8°C(55°F) | January, February, March, December | Live SST → |
| Little Manly Beach | Auckland | Fiji Sea | 14.3°C(57.7°F) | January, February, March, April | Live SST → |
| Little Oneroa Beach | Auckland | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Little Palm Beach | Auckland | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Lonely bay beach | Waikato | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Long Bay Beach | Auckland | Fiji Sea | 14.3°C(57.7°F) | January, February, March, April | Live SST → |
| Long Beach | Otago | Tasman Sea | 10.6°C(51.1°F) | January, February, March, December | Live SST → |
| Long Beach | Northland | Fiji Sea | 16°C(60.8°F) | January, February, March, April | Live SST → |
| Lonnekers Beach | Southland | Tasman Sea | 11.1°C(52°F) | January, February, March, April | Live SST → |
| Lowrys Beach | Southland | Tasman Sea | 11.1°C(52°F) | January, February, March, April | Live SST → |
| Lucky Beach | Southland | Tasman Sea | 11.3°C(52.3°F) | January, February, March, April | Live SST → |
| Madagascar Beach | Southland | Tasman Sea | 12.6°C(54.7°F) | January, February, March, April | Live SST → |
| Magnetic Beach | Southland | Tasman Sea | 11.1°C(52°F) | January, February, March, April | Live SST → |
| Maitai Beach | Northland | Fiji Sea | 15.6°C(60.1°F) | January, February, March, April | Live SST → |
| Makorori Beach | Gisborne District | Coastal Waters | 13.9°C(57°F) | January, February, March, April | Live SST → |
| Mangakurī Beach | Hawke's Bay | Tasman Sea | 13.6°C(56.5°F) | January, February, March, April | Live SST → |
| Māori Beach | West Coast | Tasman Sea | 12.8°C(55°F) | January, February, March, April | Live SST → |
| Māori Beach | Southland | Tasman Sea | 11.1°C(52°F) | January, February, March, April | Live SST → |
| Māori Pā Beach | Nelson City | Tasman Sea | 12.8°C(55°F) | January, February, March, December | Live SST → |
| Maraetai Beach | Auckland | Fiji Sea | 14°C(57.2°F) | January, February, March, April | Live SST → |
| Mārau Beach | Gisborne District | Fiji Sea | 14.2°C(57.6°F) | January, February, March, April | Live SST → |
| Mares Leg Cove | Waikato | Fiji Sea | 15.2°C(59.4°F) | January, February, March, April | Live SST → |
| Marfells Beach | Marlborough District | Tasman Sea | 11.8°C(53.2°F) | January, February, March, December | Live SST → |
| Martins Bay Beach | Auckland | Fiji Sea | 14.5°C(58.1°F) | January, February, March, April | Live SST → |
| Matapouri Beach | Northland | Fiji Sea | 15.4°C(59.7°F) | January, February, March, April | Live SST → |