Rosanna Pantaleo usually arrives for work at the Mirabella Pool in Boston’s North End at 9 a.m. The pool doesn’t open for another hour and a half, but she has to get ready for the hungry patrons who start trickling in at 10:30.

“People love the homemade pizza,’’ said Pantaleo, who has been preparing pizzas for the Mirabella snack stand for seven years.

On Saturday morning, people were already scarfing down gooey slices of Pantaleo’s cheese pizza off of flimsy paper plates and sunning on beach towels around the pool’s perimeter.

The Mirabella Pool, one of two public outdoor pools managed by the Boston Centers for Youth and Families — the other is the Clougherty Pool in Charlestown — opened Saturday for the season.

Pantaleo lives in the North End and grew up cooking with her father, who immigrated from Italy and worked in several of the neighborhood’s restaurants.

On busy days — which is pretty much every day, Pantaleo said — she’ll go through about 90 pizzas.

The Clougherty Pool was also scheduled to open Saturday, but a plumbing issue delayed it, said Bob McGann, who manages the pool. But now the pipes are fixed, the pool is filled, and Clougherty will be officially open at 11 a.m. Sunday, McGann said.

At 9 a.m. Saturday, Boston Centers for Youth and Families also opened its “Family Friendly Beach’’ at the Curley Community Center in South Boston. The enclosed stretch of sand along Boston Harbor includes picnic tables, outdoor showers, restrooms with changing tables, and Wi-Fi. For $5, guests can access the beach all season.

The pools and beach will be open seven days a week until Labor Day. Guest and day passes are not available for the pools, however, so patrons have to purchase memberships to access the facilities.

In previous years, the North End location was the only pool to offer day and guest passes.

“That pool is so popular that it’s often at capacity,’’ said Sandy Holden, public information manager for Boston Centers for Youth and Families.

Since membership costs are low, Holden said, the agency hopes eliminating the day-pass option will help ensure that members are able to access the pool.

Membership costs to the Mirabella and Clougherty pools, which can be found on the BCYF website, range anywhere from free to $40 based on age, location, and resident status.

Jose Espinal, a lifeguard and supervisor at the Mirabella Pool, was starting his first day working at the pool. Espinal, who lives in Dorchester, said he had been looking for a job that would take him out of his neighborhood for a change of scenery.

“The view definitely helps,’’ said Espinal, as he sat at the narrow end of the pool, wearing sunglasses with bright blue shades that reflected his view of Boston Harbor.

The pool had just been filled Friday, Espinal said, and despite temperatures in the 8os, the water was still cold.

“The kids are getting in, though, so that’s how you know it’s fine,’’ said Espinal.

Peter and Thomas McMahon, 8 and 10, respectively, were the first to brave the pool’s chilly water. The boys and their father, Patrick, live within walking distance from the Mirabella Pool.

One of their favorite things about coming to the pool? The pizza.

Emily Williams can be reached at emily.williams@globe.com. Follow her on Twitter @emilye_williams.