Both 10m and 6m have already shown plenty of Es with spots from Hungary and Austria of my 500mW WSPR beacon on 10m and several spots of my 1W ERP JT65 on 6m. So, it looks like there is still plenty of Es around.
The peak Es season (northern hemisphere) is May, June, July although there are spots to be had at any time of year, in reduced numbers as long as there is activity. I have had QRP 6m SSB contacts well into September. There tends to be a smaller peak (don't ask me why) around December and January.
Weak signal modes like JT and WSPR allow people to be on these bands at quiet times. Hopefully use of weak signal modes will allow some of these brief openings to be caught. It would be much harder with SSB or CW.