(IIRC) the hashing power increased by ~20% in the last few weeks, lower transaction volume and the mempool is empty again[1].
P.S: That's a good time to move your funds to a Segwit address. Do it!
[1]
https://dedi.jochen-hoenicke.de/queue/#24hYes, this can't be stressed enough. It's a very good time to merge outputs in preparation for when fees rise again....and they will! The recent congestion definitely taught me to take advantage of these periods of lower network activity. I'm in the process of migrating to Segwit wallets as well.... a little extra fee savings never hurt anybody.

If anyone's thinking "but low fees are confirming fast, so that's wrong", then try paying less than 10 satoshis per byte. It'll still take many hours, or even longer than that, for your transaction to confirm.
There's still more than 100 MB of less than 10 satoshi per byte transactions queued in large mempools:
https://jochen-hoenicke.de/queue (check the bottom graph)
Yep, I sent out lots of low-fee transactions over the past week. All my 12-15 satoshi/byte transactions have confirmed by now, but all the 5-10 satoshi/byte transactions are still unconfirmed after several days. Oh well, no hurry here!
