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Morning fog is once again seeing flights being diverted away from Wellington Airport.
The airport was blanketed by low sea fog soon after sunrise on Tuesday morning, with up to a dozen Wellington-bound domestic flights already either being cancelled or diverted.
Flight radar information shows several flights from Auckland and Christchurch circling near Wellington around 8am, before turning back.
Some flights are still scheduled to take off, but many face significant delays.
Flight NZ681 due to arrive in Dunedin from Wellington at 9.55am has been cancelled.
Wellington Airport is advising passengers to check with their airlines.