squid lid's ok when the water's warmer (like now) but the air's cold. trying to rock one all winter though...bad idea. not a whole lot sucks more than feeling 37° water on the back of your neck over & over. not to mention the fact that squid lids seem to be more easily ripped off your head during a wipe out than a regular full hood.
sub-mid 40's, a full hood is the way to go.
I checked it here this morning and it looked super fun-- clean chesty and shoulder high beauts. I ended up surfing OC though since I had to head up that way. Still super fun chest to shoulder high and semi clean. Nabbed a few sweet rides. Quite a few bombs rolled through today.