Kapiti and Horowhenua beachgoers can expect warmer than usual summer water temperatures according to the MetService.
The first weekend of summer was marked by scorching temperatures nationwide, and this week is expected to be even hotter. The warm weather is predicted to continue for the rest of the week as a ridge of high pressure sits over the country.
According to NIWA's Ben Noll, ocean temperatures around New Zealand have
been on average 2C warmer than usual - and up to 6C warmer off the West Coast. Water around the country has been warmer than average for more than a month now.
Mr Noll says a very impressive marine heatwave is unfolding near the east coast of Australia, across the Tasman Sea, and in New Zealand coastal waters.
While a slow-moving front was expected to bring rain to the far south and Fiordland on Monday and Tuesday sun should be the prevailing condition across much of the country.