It looks like you're somewhere that doesn't freeze or rain too much. You could stagger the blocks, generously mudding in as you go, then attach galvanized metal lath in a nice curve, and stucco over the whole thing. When you get to the top, make sure it's rounded or sloped so whatever rain you do get runs off.

You could try using landscaping bricks that are meant to make curved walls with.

I tend to agree with laceyvail....folks prefer to pick their own spot for sitting around a fire pit so something movable - rather than stationary - is more desirable. And sitting on a rock wall, however decorative, is not comfortable for more than just a few moments.

However you decide to proceed, make sure the wall is deeper than just a single run of the CMU's. It is even more uncomfortable to perch one's buns on a mere 6 inches of concrete :-)

For clarification, the seat wall won't be the only seating available, I'll be having a couple chairs around the fire pit as well. The wall is more to make the area more enclosed and modern but also provide extra seating in case there are a lot of people who are talking or just want to be near the fire.

@seabornman: That's kinda like something I was thinking, basically building the wall and then enclosing in concrete or such to make it nicely curved and even. I have my heart set on stone veneer though, can you put stone veneer on Stucco?

I dislike fixed seating around a fire pit since the smoke will always go exactly there .Remove the wall and get some nice chairs that can be moved easily. Adirondaks are often used I find them hard to move and for older people hard to get out of but the are many style you can use. BTW the placement of that wall is too far from the firepit IMO another reason to not do it. I like asolid ground around a pit so chairs sit a bit more evenly but if you tamp down the gravel it works too. If you insist on this it needs to be like a chir seat so 6 “ is not it. I assume this is going to be a real fire pit not propane or gas so becareful using any fabric for the chairs, sparks fly. There is nothing nice about sitting on stone no matter how pretty is is . We have stumps we move around when there are lots of people more comfotable that stone.

@Patricia: You probably haven't read all the comments but there will also be chairs as well. Additionally, i didn't mention that the fire pit is a natural gas fire so there won't be any smoke to worry about.

Are you thinking of real stone or the stuck-on variety? Real stone should have a footing to sit on and would be tied to the wall with ties. The stuck-on stuff can be adhered to the galvanized metal lath using mortar. Follow the manufacturer's instructions.

@seabornman: I'd be using the stuck on variety. But okay perfect! I appreciate your help!

Hey! I would love to see the finished product! Im wanting to use a similar design but have it around a sand/play area for my kids instead of a fire pit