Harry, 34, rugged up in the black Norrøna "Oslo" coat on Monday when the couple took a stroll through Abel Tasman National Park, with Meghan wearing a raincoat.
Meghan and Hannah used to message each other on the social media site, with Hannah revealing that the former Suits star had offer support and encouragement when she had been struggling with ill health.
Ryen Anderson, who was on her team said: "Meghan was asking us how to throw and we said it doesn't matter".
For the occasion, Markle wore a color-coordinated blue set, consisting of a Givenchy sweater and a matching skirt, which was completely see-through when the sun shone on it.
Either way Meghan Markle has flashed her royal underwear.
'I suspect this is what is happening here and the fabric is thick heavily woven piece creating a camera strobe and the illusion its sheer'.
"She would tell me to do well at university and encourage me to be myself". She was so lovely and kind about it all despite being rushed.
New Zealand Prime Minister Jacinda Ardern made light of the grizzly conditions, describing her country as "the land of the long white cloud where a little bit of rain tends to fall from".
During the visit, the duke praised New Zealand for its commitment to the QCC - an initiative which promotes the conservation of forests.
Harry and Meghan will head back to the United Kingdom on Thursday after a marathon 16-day tour which took in four countries and saw the couple meet koalas and crowds in Sydney, try their hand at welly-wanging in New Zealand and take in traditional culture in Fiji.
Just one day earlier, the royal couple also both gave speeches to close the 2018 Invictus Games in Sydney, Australia.