A LOT of Bermuda lawns are producing seed heads right now. In fact, it is hard to find a Bermuda lawn that is NOT producing seed heads right now.
Don't panic...its not a weed! These seed heads look very similar to those produced by common weeds like bluestem, bahia or crabgrass, and many people make the mistake of trying to treat them.
While you don't need to do any type of treatment, you do need to listen because your lawn is trying to tell you something. When Bermuda produces seed heads, it is a sign of stress. Improper watering, soil compaction, shade, soil temperatures, improper mowing etc....these are all things that could be putting stress on your Bermuda and causing it to seed.
As widespread as Bermuda seeding is right now, it is likely a result of overwatering (too much rain!) and temperature fluctuations. In other words, there is nothing you can do about it. Just keep mowing it every week and it will eventually correct itself. If it doesn't correct itself as we start to dry out, then it might be time to take a closer look to see if there is a deeper issue.