Conrad Murray -- Manslaughter Trial Is a Beach

The day after Conrad Murray's defense team rested their case in his manslaughter trial, the doc enjoyed a day at the beach with his girlfriend Nicole Alvarez and their son in Santa Monica on Wednesday.

Closing arguments are scheduled to begin this morning -- and some experts believe there is a good chance the jury could return a verdict by the end of the week.

This is how he rolls ... his jeans.

Last night, Conrad went to Gladstones in Malibu with some of his former patients for a fancy pre-closing arguments dinner.

We asked Murray if he regrets not testifying on his behalf ... but it was obvious what his biggest regret was ... no leftovers wrapped in those awesome tinfoil swans.