On the weekend The Spit is a great place to go if you are a dog lover, if you have an aversion to dogs and are looking for a nice quiet place to spend the day I would recommend you visit at one of the other beaches further down the Coast.
There is one cafe here that services a large area and is always very busy, it has an indoor seating area but I've very rarely seen anyone sit in there, it is more common to takeaway your order and find a nice spot on the beach to people watch and eat.
The beach features great views looking down the coast and also a jetty suitable for fishing off of (admission onto the jetty is for a small fee).
As it is dog friendly, even man's best friend has a great time here. The beach entrance is equipped with doggy poop bags and bins and a water bowl to keep your pooch hydrated.
For the humans there are toilet facilities and outdoor showers to rinse off under if you are game (and experienced) enough to venture out into the surf.
A small section of the beach is patrolled by lifeguards over summer.
If you prefer calmer waters then instead of heading to this section of Main Beach I suggest you park in one of the car-parks on your left hand side as you drive in and visit the protected waters of the seaway found here.
Worthy to note is that as The Spit is located on the end of a peninsula there is only one way in and out, meaning that on weekends and public holidays traffic often backs up, just something to keep in mind when estimating travel times.