Use a website like this,
http://core.jochen-hoenicke.de/queue/#0,24h

Which basically tracks the mempool and you can see which "sat/byte" are being filled at the moment. The mempool was very high this week, it wasn't due to the halving because the retarget is only -5%, so its mostly just more active network.

A few hours ago the 3 sat/byte were getting filled and then all of a sudden the rates started to go up, so I am not sure if we will dip to the 1 sat/byte area which would be the cheapest to withdraw in. Basically unless it happens in the next 24 hours or so, the week days will keep making the fees higher due to more transaction. If so just wait until next Sunday and see if it goes to 1-2 sat/byte and withdraw then.