S.O.
Hi K.,
It sounds like it's time to switch to one nap a day. My son started the process around this time. We started laying him down 15 minutes later then moved it back every few days until he was only taking one nap. It ended up being at 12 noon for about 4 long months and then we moved it back to 1 pm. He is now 2 1/2 and still takes a nap at 1.
Otherwise try putting him to bed 15-30 minutes earlier. I know this sounds backwards but it works.
S.