With Monroe Street Pool Back, One Carlsbad Pass Now Covers Two Very Different Pools

Say Monroe Street Pool closes for its maintenance hour at 10:30 on a Tuesday morning. Where do you swim? Until this month, a Monroe passholder would have had to pay again somewhere else. Since the rebuilt pool reopened on Nov. 3, a monthly or quarterly membership covers both of Carlsbad's city pools. Alga Norte Aquatic Center is open at that hour and doesn't close for maintenance on Tuesdays at all.

That changes how the city's swimming works. Carlsbad used to have two pools with two separate passes. Now it has two buildings with the same hours, one fee table, and maintenance hours that fall on different days. The two pools also play very different roles. A swimmer who learns how they fit together gets more out of the membership than one who only uses the pool closest to home.

One membership, one fee table

The city has replaced its separate Monroe and Alga Norte passes with a single membership that covers both facilities. Monroe's fees, including memberships, drop-ins and lane rentals, have gone up to match Alga Norte's. The City of Carlsbad aquatics page says this is the first fee change in more than 10 years. The city says the update reflects rising operating costs and brings its rates closer to those in neighboring cities.

Here are the rates on the city's updated aquatic fee table:

Drop-in rates are $5 for adults, $3 for youth, $7 for an aquatic fitness class or a Masters workout, and $2 for spectators. Lane rentals cost $24 for individual or commercial use and $20 for nonprofits. Carlsbad residents still get a 10% discount on memberships and lane rentals.

What you need to do depends on which pass you held before the reopening:

1. Former Monroe Street Pool monthly or quarterly passholders need to buy the new combined pass. You can buy it online through the city's registration catalog or in person at the pool.
2. Alga Norte monthly or quarterly members don't need to do anything. Your existing membership now covers Monroe too.
3. Drop-in swimmers can only buy day passes in person.

The week, pool by pool

Both pools now keep the same public hours: 6 a.m. to 7 p.m. on weekdays and 8 a.m. to 4 p.m. on weekends. Alga Norte stays open until 5 p.m. on summer weekends. The main difference is the weekly maintenance hour, when each facility closes. Those hours fall on different days:

When one pool is closed for maintenance, the other one is open. An early swimmer who usually goes to Alga Norte on Monday or Friday can go to Monroe instead and keep the 7:30 slot. A late-morning swimmer at Monroe can do the same at Alga Norte on Tuesdays and Thursdays.

For lap swim, the city asks swimmers to swim continuous laps and to share lanes. It also has a pool-use calendar for each facility that shows which lanes are reserved on a given day. Check that calendar before you go. It's the best way to tell how crowded each pool will be at a given hour.

What each pool is built for

The pass is the same at both pools, but the pools themselves are quite different.

Monroe Street Pool sits at 3401 Monroe St., next to the Carlsbad High School football field. The rebuild added a larger pool with 50% more lanes and a bigger deck with lockers and outdoor showers. It also added more shade and bleacher seating, a larger parking lot, updated locker rooms, and new family restrooms. The Coast News reported a few more changes from the Oct. 29 ribbon cutting. There's a new outdoor entrance that lets swimmers bypass the locker rooms, a redesigned lobby, and a room for meetings and small gatherings. An 8-foot wall with metal gates now runs along Monroe Street to cut noise for nearby homes.

Monroe is next to the high school, and its evening schedule shows it. The pool-use sheet for Tuesday, Dec. 1, has Carlsbad High using the pool from 3:45 to 7 p.m. Carlsbad Water Polo follows from 7 to 9 p.m., after public hours end. If you like to swim after work, compare the Monroe and Alga Norte calendars for that afternoon before you pick a pool.

Alga Norte Aquatic Center is in Alga Norte Community Park in the southern part of the city, and it has more variety. It has a 56-meter competition pool with a bulkhead and viewing bleachers, plus a 25-yard, 12-lane instruction pool. It also has a warm-water spa for adults, 1-meter and 3-meter diving boards, a splash pad for children, and a fitness room. The city's Aqua-Fit classes on Tuesdays and Thursdays use a shallow instructional pool kept at about 85 degrees.

Now that one membership covers both, you don't have to give up one set of features to get the other. A family with a pass could swim laps at Monroe on a weekday morning and take the kids to the splash pad and diving boards at Alga Norte on Saturday without buying anything extra.

Why Monroe was rebuilt this big

The larger pool goes back to a survey from six years ago. In 2020, the city offered three options for the aging pool, which opened in 1982: essential repairs, modernization without expansion, or a full renovation and expansion. The Coast News reported that a city survey that fall drew 944 respondents and 591 comments. Respondents ranked the largest option highest, even though it cost more and would take longer to build.

The priorities in that survey match what was built. According to the same report, 49% of respondents gave a larger pool the highest importance rating. Another 47% did the same for maximizing solar energy, and 45% for more lap swimming. The finished project replaced the solar water-heating system and added rooftop solar panels that generate electricity. The city called the survey voluntary and not scientific. Still, the project that came out of it follows the survey's top three priorities.

The project also needed voter approval. Proposition H, a city law passed in 1982, requires a public vote for certain construction projects that use more than $1 million in general fund money. Voters approved Measure J in November 2022, which allowed the city to spend up to $24 million. With inflation adjustments, that limit could have risen to nearly $27 million. Construction began in March 2025, and the city says the project finished under budget at about $21 million.

At the ribbon cutting, City Manager Geoff Patnoe said in the city's reopening announcement that the pool "will continue to provide a place for people of all ages to swim, learn and stay active for years to come." After about 20 months of construction, Monroe has more lanes, and its lap swimmers can also use Alga Norte without a second pass.

Lessons and Masters this winter

The city's Winter 2026-27 swim lesson session runs from December through February. Class listings went up on Oct. 28, and registration opens Nov. 12. The city offers swim lessons year-round, so a child who missed the fall session can join the winter one. Families can see class times and locations on the City of Carlsbad swim lessons page.

Carlsbad's Masters program runs year-round for adults 18 and older. The city lists weekday workouts from 6 to 7:15 a.m. and noon to 1:15 p.m. On weekends, workouts run from 8 to 9:15 a.m. on Saturday and Sunday, and the Sunday session is long course. Masters costs $70 a month on its own or $45 a month as an add-on to a regular membership. A drop-in workout is $7. If you swim Masters several times a week and also swim on your own, the add-on usually costs less. Check the pool-use calendars to see which facility hosts each workout.

For anything else, Monroe Street Pool's phone number is 442-339-2685.

A new pool nearby can change how you think about a neighborhood, whether that means Monroe's spot by Carlsbad High or Alga Norte's in the south of the city. If you'd like to talk about how Carlsbad's parks, pools and everyday routines fit the way you want to live, LUXRE Realty is happy to help. Contact Us when you're ready.