As I’ve noted in the past, the Series I Savings Bond rate is composed of a fixed and a variable portion. Based on recent inflation data, it looks like the variable portion of the rate will be 0.74%. The fixed rate currently stands at 0.2%, so if that stays them same, then I Bonds will pay 0.94% starting in November.
If you buy before November, you will get the current rate of 1.74% for six months, then the new (November) rate for the following six months. We’re actually maxed out on I Bonds for the year, so we can’t buy any more until January.