Low-lying fog is affecting air travel around the country, with flights delayed and cancelled at several airports, including Dunedin and Invercargill.
A Southern district police spokeswoman said the fog had not caused any traffic issues, and no crashes had been reported throughout the district since last night.
However, she advised motorists to maintain safe following distances and drive with care until the fog clears.
Arrivals and departures information for Dunedin Airport and Invercargill Airport show several flights have been delayed until later this morning, while a handful have been cancelled.
MetService meteorologist Peter Little said the low-lying fog was affecting coastal areas in the South Island and had reached as far north as Wellington as calm conditions allowed off-shore moisture to "hug the coast''.
While very little wind was expected in the lower south for the day, the fog would clear as the day warmed up.
"It should be gone by midday, but it will be breaking up as the morning goes on,'' he said.
Meanwhile, the first plane has landed at Wellington Airport since fog grounded all flights yesterday morning.
Passengers are beginning to check in for flights in the capital; however there are still big delays and the backlog will not be cleared until later today.
Many flights are delayed or cancelled because of the foggy conditions, following a day of mist and rain yesterday.
Hundreds of passengers were stranded, and many were forced to spend an uncomfortable night at the terminal after hotel rooms and rental cars were quickly snapped up by travellers caught out by the unexpected delay.