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Earth Day Festival | Costa Mesa City Hall Lawn, Costa Mesa

Saturday, April 18

Saturday, April 18, 2026

Celebrate Earth Day with a morning of eco-friendly fun, learning, and community activities in Costa Mesa.

Explore booths featuring environmental information, interactive displays, and hands-on demonstrations focused on sustainability. The event highlights simple ways families can make a positive impact on the planet.

Families can enjoy games, raffle prizes, and activities throughout the day, along with a flower-planting demonstration and free compost giveaways.

Admission is free.

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Before You Go: Visit the City of Costa Mesa’s website for updates and event details. This event is organized by the City of Costa Mesa and community partners. Kidsguide is an independent community resource helping families discover fun events across Southern California.

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Date & Time:

Saturday, April 18 @ 10:00 am - 2:00 pm

Cost:

Free

Disclaimer: The Kidsguide team does their best to keep event details accurate at the time of posting, but information can change without notice! Be sure to double-check with the event organizer before heading out. Kidsguide is not responsible for any errors, omissions, or changes on our calendar—we’re just here to help you find the fun!