Dates and times are subject to change without notice. The pool will be closed if the wind chill is below 70 degrees or at the manager's discretion based on inclement weather, low attendance, staffing, state and local guidelines, or unusual circumstances. Refunds will not be given - see rain check policy below for further details. For daily updates, call 630-964-3410, ext. 2, opt. 2.
RAIN CHECK POLICY: A re-entry pass will be issued to person(s) who paid a daily fee when within two hours of purchase, the facility closes for the day due to inclement weather. Rain check re-entry passes will be valid until the end of the season in which the pass was issued. In order to receive a rain check re-entry pass, patron must show a valid entry receipt.
WEATHER & AMENITY CLOSURES: The pool may close without prior notice for inclement weather, air temperature or windchill below 70 degrees, attendance less than 30, mechanical issues or pool maintenance. Refunds will not be issued. In addition, certain amenities may be closed for partial usage at staff's discretion.
Guests are welcome to arrive any time during Open Swim. A discounted admission rate is offered for those entering the facility after 6:00pm.
Tots under 6 years of age with adult are allowed early admittance to the tot pool. All who wish to stay for Open Swim must exit the facility and pay the daily admission fee to re-enter. Free for Season Passholders.
For adults age 18 years and older who would like to get in a serious swimming workout or just a few laps in the lap pool. Free for Season Passholders.
Adults age 50 years and older are allowed early admittance to the pool on Sundays only. All who wish to stay for Open Swim must exit the facility and pay the daily fee to re-enter. Free for Season Passholders.
2026 REGULAR SEASON: May 30 - August 9 |
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|---|---|---|---|---|
|
ENTRY
|
DATE
|
DAY
|
TIME
|
|
| OPEN SWIM | May 30 - August 9 | Saturday & Sunday | 11:00am Early Admittance for Passholders |
|
| Monday - Sunday | 11:30am - 8:00pm | |||
| SENIOR SWIM | May 31 - August 9 | Sunday | 10:00 - 11:00am | |
| ADULT LAP SWIM | June 1 - August 7 | Monday - Friday | 6:00 - 6:45am | |
| TOT SWIM | June 2 - July 30 | Tuesday & Thursday | 9:00 - 11:00am | |
| INDEPENDENCE DAY | July 3 | Friday | 11:30am - 3:00pm | |
| July 4 | Saturday | 11:00am Early Admittance for Passholders |
||
| 11:30am - 6:00pm | ||||
2026 POST SEASON: August 15 - September 7 |
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|---|---|---|---|---|
|
ENTRY
|
DATE
|
DAY
|
TIME
|
|
| OPEN SWIM | August 15 - September 6 | Open Saturday & Sunday Closed Monday–Friday |
11:00am Early Admittance for Passholders |
|
| 11:30am - 6:00pm | ||||
| LABOR DAY | Last Day of Season September 7 |
Monday | 11:00am Early Admittance for Passholders |
|
| 11:30am - 6:00pm | ||||
2026 PARTIAL POOL CLOSURES |
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|---|---|---|---|
|
EVENT
|
DATE
|
TIME
|
|
| *Swim Meet | Thursday, June 4 |
6:00-8:00pm Lap lanes & part of zero-depth pool |
|
| Tuesday, June 16 |
5:45-8:00pm Lap lanes & part of zero-depth pool |
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| **Passholder Appreciation Nights | Sunday, June 28 |
Closed at 7:00pm to general public Open until 10:00pm for 2026 Passholders No guest passes or punch cards accepted |
|
| Sunday, July 26 | |||
| ^Independence Day | Friday, July 3 | Closed at 3:00pm | |
| Saturday, July 4 | Closed at 6:00pm | ||
*Swim Meet Partial Closure: Due to Sea Lion Swim Team's home meet, the lap lanes and a portion of the zero-depth area of the main pool will be closed on the following date and time listed above. Every attempt will be made to allow as many portions of the park to remain open; however, Sea Lion Aquatic Park Management reserves the right to close designated areas if circumstances warrant. Thank you for your understanding and cooperation.
**Passholder Appreciation Night: The pool will be closed to the general public and open late just for Sea Lion Aquatic Park season passholders! No guest passes or punch cards will be accepted.
^Independence Day: The pool will close early on July 3 due to the Lisle Park District Summer Entertainment Series in Community Park. Ohio Street will be closed at Yackley Avenue beginning at 4:00pm. No through traffic is permitted and no public parking is available short of Handicap parking on the North side of the High School. Short Street will be closed at Route 53 once the Riverview parking lot is full. Parking here is limited so the closure could take place shortly after 4:00pm. For more details, visit lisleparkdistrict.org/summerentertainmentseries.