Craig Jeffrey of Extreme Weather Taranaki captures the heavy fog in New Plymouth on Thursday morning.

Flights have resumed, albeit with some delays, at New Plymouth airport after a number were grounded on Thursday morning due to thick fog.

A total of eight Air New Zealand flights and two Jetstar flights were cancelled from departing and arriving into New Plymouth.

On Thursday morning Metservice stated New Plymouth visibility was at 6.5 kilometres and humidity at 100 per cent. The fog cleared in the early afternoon with visibility increasing to 9.7 kilometres and humidity decreasing to 94 per cent.

Blanton Smith/Stuff Fog in New Plymouth has seen flights out of and into the region cancelled. You can usually see Paritutu Rock from the Taranaki Daily News office window. Today you can only just see the building below.

It is forecast to remain cloudy with drizzle at times for the rest of Thursday and Friday, clearing on Saturday.

Blanton Smith/Stuff The typical view from the Taranaki Daily News office in the evening.