Good, and more reliably good than most buyers bother to check. Across the county, four in five graded schools are good or better. The nearest primary is about ten minutes' walk away. The nearest secondary is under twenty. The grades are the easy part. Getting a place is the part that takes paperwork.
Ofsted has graded 67 schools and settings across East Sussex, and 54 of them are good or better, which is roughly four in every five. Seven are outstanding and 47 good. At the other end, 7 require improvement and 6 are inadequate. These counts cover the whole local authority, not just this stretch of clifftop, so they describe the system your child enters, not the school at the end of your road. Another 84 settings across the county hold no published overall grade yet. That means not yet graded, not bad, and a parent who reads the gap as a warning is inventing a problem the inspectors haven't found.
The primaries that come up for the area are Telscombe Cliffs Academy, Peacehaven Heights Academy, and Meridian Community Primary School and Nursery. The secondary is Peacehaven Community School. The Department for Transport's 2019 modelling puts the nearest primary about nine minutes' walk from the typical home and the nearest secondary about 19 minutes' walk, or roughly nine minutes by car. That's close enough for most children to walk, which leaves the school run as something parents choose to do rather than something they have to.
None of this guarantees a place. Living near a named school, or in a town that shares its name, doesn't put your child on its register. East Sussex decides admissions under its own published rules, and those rules don't care which estate agent told you the house was "in catchment." Check the admissions criteria for the exact address before you offer, not after. The parents who get caught out are the ones who trusted a listing's school claims and never read the council's version. They find out in spring, when the offer letter arrives with a different school's name on it.
The individual grades for these schools aren't in this answer, and it doesn't guess at them. Look up each one on Ofsted's register before you shortlist, and read the report as well as the headline word. A good grade in a report written years ago says less than a thin one written last term.
The schools are one of Telscombe Cliffs' real strengths. The county system is mostly good or better, and the local schools are within walking distance, so the harder job is the admissions paperwork.