"My hands after spending so long in wet gloves. The blisters were never bad on this Polar row, but the wet & damp seeped into the skin," he wrote on Twitter.
"This has certainly been one hell of an adventure!"
A photo of my hands after spending so long in wet gloves. The blisters were never bad on this row, but the wet and damp...
Posted by Alex Gregory MBE on Wednesday, 30 August 2017
"I've never been so wet and cold for so long. It's seeping into my bones, there is absolutely no escape from it.
"Everywhere we look beyond this tiny boat we've been living on is ice cold, dark grey ocean.
"There's no perception of distance, the horizon is just slightly lighter grey like the change from night to day, just a slight change in tone."
Gregory was forced to abandon the expedition after his team was stranded on a Norwegian island midway through their proposed 6-week expedition.
"My three young children need their dad, they need him to be responsible and to make the right decisions in life," he told Gloucestershire Live.
"They need him to be brave, adventurous, ambitious and to set them the right example, but they also need him to not take unnecessary risks."