I have a withdrawal that has been pending for 16+ hours!
Coinbase the last few days has posted a warning due to the Bitcoin fork.
Coinbase's Dashboard:
Bitcoin Cash and Withdrawal Delays
Coinbase does not intend to support Bitcoin Cash (BCC). If you wish to withdraw bitcoin (BTC) before the hard fork, we recommend you initiate your withdrawal by 10 am PT on Monday July 31st due to potential network congestion.
At this point, Coinbase's recommendation seems to be way off. If you wait until the last minute and try and withdraw by tomorrow morning, if the delays stay the same, you will not receive your coin in time.
I would recommend withdrawing today. As we get closer to the deadline these delays are only going to get longer.