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In collaboration with AltaSea and Cabrillo Marine Aquarium, the 6th Annual California Seaweed Festival will take place October 10 - 11, 2025.

Location: San Pedro in the Los Angeles Harbor

Theme: Urban Ocean Ecosystems

If you have ideas on hosting a panel, workshop, or demonstration feel free to contact us at hello@californiaseaweedfestival.org

OUR STORY

The California Seaweed Festival arose from decades of studying seaweeds, admiring their beauty and learning myriad ways that seaweeds make life better. We want to share the beauty and diversity of seaweeds on our coasts. 

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Help us celebrate seaweeds in California by becoming a sponsor!

Our 2025 Sponsors

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Join us, we’re social!

It’s always a good time to celebrate seaweeds in California.