Depends on what you can afford. Was there in April, we stayed on base, so not a good reference. The closer to Big Sur, the more expensive on average. Carmel is pricey. Budget? Look at Seaside or Marina.
Monterey has a nice aquarium, there's a historic state park downtown, marina has clam chowder, but Big Sur is my happy place. From Seaside, you can still be in Big Sur in 30 minutes. Took us about 35 minutes from La Mesa to River Inn. But we stopped a lot, so it was over an hour.
I like the River Inn because of their backyard. Grassy area right on the river. Take an Adirondack chair and plop it in the river. Restaurant there is good, but I prefer getting some food from their grocery store and having a picnic. Ice cream from the bus there is a must.
Road was closed south of the community of Big Sur, north of Pfeiffer Beach. They are making progress, but two big slide areas still need repair.
North of there, Garrapatta has a lot to offer. Beach to mountains. Andrew Molera if you like hiking in the mountains.
Back north, tide pools in PG are cool. Sunset at Asilomar is a must.
But it's July, so it'll just be foggy the entire time!