I've noticed the same thing with my spending since the start of the year. What really makes a difference is spending less time in the fresh produce section in summer and going for frozen stuff instead - I know it sounds cliché, but honestly they keep the nutrients pretty well and cost like half the price. For basics like pasta, rice, and oil, I buy store brands without hesitation, they're rarely worse and you actually save a ton of money. You can also try checking out smaller neighborhood supermarkets or local markets - they're often cheaper than the big chains and you've got more options for seasonal produce.
What also helps me a lot is making a real list before I go and not letting myself get tempted by impulse buys - I know it's easy to say but in practice that's where most of the spending happens. Another simple but effective thing: make meals that can be made in bulk, like a big tomato sauce or a baked dish that you can freeze and reuse multiple times. It takes a bit more time upfront but in the long run you're buying less often and wasting less. Do you buy a lot of processed products or more raw ingredients? That really changes the strategy you need.