The Monterey Bay Aquarium closes at 6 p.m. most days, but hours shift by season

The Monterey Bay Aquarium, located at 886 Cannery Row in Monterey, California, closes at 6 p.m. on most days during peak season (roughly May through September). From October through April, closing time moves to 5 p.m. The aquarium opens at 9:30 a.m. year-round, giving you between 7.5 and 8.5 hours to explore depending on the season.

Hours can shift for special events, holidays, or maintenance. The aquarium occasionally stays open later for evening programs or closes earlier on certain days. Before you plan your visit, check the official Monterey Bay Aquarium website or call 831-648-4888 to confirm the exact closing time for your specific date.

Key Takeaways

  • Standard closing time is 6 p.m. May through September and 5 p.m. October through April.
  • The aquarium opens at 9:30 a.m. every day, so you have between 7.5 and 8.5 hours to visit depending on season.
  • Holiday schedules and special events can change closing times, so verify the date you plan to visit on the official website.
  • Calling 831-648-4888 takes less than a minute and confirms hours for your exact visit date.

Peak season hours (May through September)

From May through September, the aquarium operates from 9:30 a.m. to 6 p.m. This is the busiest time of year, when school is out and tourism peaks. Arriving early—ideally by 10 or 11 a.m.—helps you avoid the heaviest crowds, which typically build in the afternoon.

If you are visiting during this window, plan for a full day. Most visitors spend 3 to 4 hours inside, though you can move through faster if you skip the interactive touch pools and focus on the main exhibits. Parking fills up quickly in summer, so arrive before noon if possible.

Off-season hours (October through April)

From October through April, closing time drops to 5 p.m., giving you a shorter window from 9:30 a.m. to 5 p.m. This is still plenty of time for a full visit, and crowds are significantly lighter. You will find shorter lines at the ticket booth and more breathing room in the galleries.

The trade-off is that some seasonal exhibits may be closed or operating on reduced hours during winter months. Call ahead if there is a specific exhibit you want to see, because the aquarium sometimes rotates displays or closes sections for maintenance during the slower season.

Holiday and special event hours

The aquarium stays open on most major holidays, but hours may differ from the standard schedule. Thanksgiving, Christmas, New Year's Day, and Independence Day sometimes have adjusted opening or closing times. Some holidays bring extended hours (staying open until 7 or 8 p.m.), while others may close earlier.

The aquarium also hosts special evening events—such as adult-only nights or holiday celebrations—that extend hours beyond the normal 5 or 6 p.m. close. These events require separate tickets and are announced on the website several weeks in advance. If you are planning a holiday visit, check the calendar on the official Monterey Bay Aquarium website or call to confirm.

How to plan your visit around closing time

Arrive at least 90 minutes before closing if you want a meaningful experience. This gives you time to buy tickets, navigate the building, and see the major exhibits without rushing. If you arrive within 30 minutes of closing, you will have only a brief window to walk through, and some areas may already be closing off visitors.

The aquarium is largest near the entrance (where the kelp forest and sea otters are) and extends backward through multiple levels. If you are short on time, prioritize the front galleries and the outdoor sea otter habitat. The jellyfish and deep-sea exhibits are further back and require more time to appreciate.

Ticket windows and last entry

Ticket sales typically close 30 to 45 minutes before the aquarium closes. This means if closing time is 6 p.m., you may not be able to buy a ticket after 5:15 or 5:30 p.m. Buying tickets online in advance avoids this issue entirely and often costs less than buying at the gate.

If you have already purchased a ticket, you can usually enter up until closing time, but staff will begin ushering people toward the exits in the final 15 to 20 minutes. Plan your route so you are not caught in a back gallery when closing announcements begin.

Nearby attractions and timing your day

Cannery Row has restaurants, shops, and other attractions within walking distance of the aquarium. If you plan to eat dinner after your visit, factor in the 6 p.m. or 5 p.m. closing time. Many restaurants fill up around 6:30 or 7 p.m., so arriving by 6:15 p.m. gives you a better chance of getting a table without a long wait.

If you are combining the aquarium with other Monterey activities—such as the Monterey Bay National Marine Sanctuary Visitor Center or a harbor cruise—plan your aquarium visit first, since it has fixed closing hours. Other attractions often have more flexible schedules or stay open later into the evening.

Frequently Asked Questions

Can I stay inside the aquarium after closing time?

No. Staff begin clearing the building at closing time and will ask all visitors to leave. You cannot remain inside after 5 or 6 p.m., even if you are in the middle of an exhibit.

What if I buy a ticket but don't use it the same day?

Tickets are valid for one year from the date of purchase, so you can return on a different day. However, you cannot enter after the aquarium closes on your chosen date—you would need to come back during operating hours.

Does the aquarium close for maintenance or cleaning?

The aquarium occasionally closes entirely for maintenance or special events, but this is rare and announced well in advance on the website. Standard daily closings follow the 5 or 6 p.m. schedule year-round unless a special closure is posted.

Is there a difference in closing time on weekdays versus weekends?

No. The aquarium closes at the same time every day of the week—5 p.m. in winter and 6 p.m. in summer. Weekends are busier, so arriving early is even more important on Saturdays and Sundays.

Can I call the aquarium to confirm hours before I visit?

Yes. The main number is 831-648-4888. Staff can confirm the exact closing time for your visit date and let you know about any special events or exhibit closures that might affect your experience.