The UK Border Agency has confirmed the demonstrator on the roof of the Morton Hall centre in Swinderby near Lincoln is a detainee of the immigration centre.
"There is currently a peaceful protest ongoing at Morton Hall in which one detainee has scaled the roof.
"We are working with the Prison Service to resolve the situation."
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Any mist or fog will clear quickly during the morning leaving the rest of the day dry with plenty of hazy sunshine.
Saturday will be fine and dry with sunny spells but with a noticeable easterly breeze.
Former Aston Villa, Coventry City and Leicester City star Dion Dublin tells ITV News Central how he thinks his former teams are doing.