All great recommendations above except I'll add the following for beaches:
NOTE: tide can make the difference for
Some beaches, especially in late September as king tides start to come to play. Lower tide is best in all cases and especially if your trying to do tide pools. Any tide 3.5 and lower is best. 3.5' is pushing it as a general rule of thumb.
You'll have great water temps in the 70s at that time of year. It's supposed to an El Niño year but haven't seen it yet. Water is already 67ish degree,
Photos I added are my photos from Del Mar all way to Carlsbad
From south to north:
Coronado - great town and view however the beach is typically closed due to the Tijuana sewer spills. If it's closed (most likely) you won't be able to get in the water. Still a great visit
OB - local beach but great people watching. Pier is closed and under redesign
Mission Beach - pretty touristy and not as stunning of a beach you'll find up north. You do have
https://maps.app.goo.gl/EsWHP1iUJpFuFT889?g_st=ic Belmont Park which would be fun with kids your age
PB (pacific beach) - Local and very college / party eccentric. For family I would skip this
La Jolla and Scripps - great town and views. LJ has seal cove which has a cool for first timers. I like LJ Shores if you're not wanting to go further north, this would be my rec.
Torrey Pines State Beach - now you're getting better views and big cliffs. This beach has a lot of options for paid and free parking. Look at the tides and aim for lower tides. (2' and below are ideal). You can also hike Torrey pines which is very cool.
Del Mar - great family beach and can't go wrong between 15th street and power house all the way to Dog Beach. Jake's is great spot and views. I would also recommend Monarch in Del Mar for views. Lot of places to eat and treat.
Solana Beach - fletcher cover, table tops, and seaside. All family friendly beaches. seaside is another state park and plenty of parking. A lot of lunch options around too. Las Olas right past seaside is a great Mexican food spot.
Encinitas (someone said Escondido above…they have their E towns mixed up) - depending on your comfort level for parking there's bunch of options. This is where I go mostly as it's closest. Beacons is a hike but my favorite, moonlight is a family tourist spot with facilities, Swamis / Pipes is actually an awesome beach if you don't mind stairs.
Carlsbad - Ponto, Tamaracks are family friends and close to Legoland
Oceanside - they are doing beach restoration in most beaches so it's tough. Great surf spots though








