Am consiudering going to Antarctica from Norway in August but I am prone to motion sickness. Does anyone know if there are rough seas at that time of year?
Thanks,
Wendy

Norway to Antarctica is one helluva long sail, and there certainly will be rough seas in August, especially as you approach the southern ocean, as it will be midwinter. Eventually the seas will become completely calm though, as the ice freezes up around the hull of your boat.

Lol

Thanks Gardy - I needed a laugh to start the day ...

Yes, you'll certainly save yourself a lot of unnecessary turbulence if you start from somewhere closer. New Zealand offers possibilities, but it might be better to consider a summer voyage.

OK, we've all had our laugh.

Now does anyone know how rough the seas are in August if you get a boat going north of the Arctic Circle from a Norwegian port?

Although the OP asked about going to Antarctica, I will answer the question about going "north of the Arctic Circle from a Norwegian port?"

We went from Longyearbyen, a Nowegian port above the Nowegian mainland, directly north in an August. In a few hours, we hit ice, and continued through the ice all the way to the North Pole.

Coming back, on the way to Murmansk, the seas very essentially calm.