As they enter the next chapter in their lives, some 663 students will graduate at the ceremony to be held at Cardinal Stadium.
Victoria Hoffmeister is the valedictorian and Jordan Abbasi and Joseph Lee are the salutatorians.
ESPN personality Chris Berman will give the commencement adress.
Seating in the bleachers at Cardinal Stadium is unlimited to families, but on a first come, first serve basis.
Weather is expected to be close to perfection with sunny skies and temperatures in the low to mid-70's.
Rain is not in the forecast, but should a freak weather system crop up, the graduation will be held in the Greenwich High gymnasium in two groups – students with last names beginning with L-Z will begin at 5 p.m. and students with last names beginning with A-K will begin at 7:15 p.m.
If graduation is moved indoors, families will be limited to three tickets for admission.
In the event of an indoor graduation, there will be a live feed into the high school auditorium for guests who do not have tickets.
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