Websites for some government agencies and banks went offline for some time, which could be another integrated cyber attack.
The New Zealand Post and Inland Revenue say they are investigating the closure.
The Met Service was able to send its users to its backup website, which contained important information, including weather clocks, warnings and rain radar imagery, while working to keep its main website up and running.
ANZ Bank and Kiwi Bank customers reported not logging into their accounts.
On Friday, the Internet infrastructure provider. Vox was subjected to a denial of service (DDoS) attack., Which caused a stalemate across the country.