I am out on Long Island and normally start crabbing in June. If the early warm weather holds up I might start setting some traps in May.
From past experience I do not start dropping traps until the water temp hits at least 65 degrees.
Also I take into account the amount of rain and snow melt leading up to the start of crabbing!
As of now it looks like the water temp has at least 20 degrees to go before it hits the minimum of 65 but if the current warm streak keeps up its run (plus the lack of snow melt and rain continue as well)then it may well be the earliest we have seen a start to crabbin in many years!!!