I can't find proper command in the help section of the console.
As far as I know, there isn't a way to tell directly. However, we can approximate from the difficulty using the following relation:
Hashrate = Difficulty * 2^32 / 600
At the current difficulty ~ 0.6482, that means we can guess 4640000 hashes/sec, i.e. 4.64 MHash/s.
EDIT: Hold on, that's clearly wrong. Let me figure out what the correct equation is.