after geralt goes to look for julie.

[ it's only a day or so after geralt messages him that sam reaches out - and yes, he does reach out first, rather than just showing up to nadine's (or, he supposes, jaskier and geralt and ciri's) to check up on her, because that is the polite and modern way of doing things and from everything he's come to know about nadine, she is both of those things.

so, it will be sometime mid-afternoon that she gets the message. he may or may not already be on his way in that direction, but sam will always find something else to occupy his time if need be. ]