Working with you
to keep Casco Bay blue.

Join us


Friends of Casco Bay’s mission is to improve and protect the environmental health of Casco Bay. 


Our areas of work are:


Get to know us. Read our stories.

Water Reporter By Sandy Marsters Portland Pier Sea Level Rise

Rising seas: confronting change and cultivating resilience

June 10, 2021

Many of us are all too familiar with the feeling that the crises of climate change are larger than life, beyond the scope of our… Read more

Why does Casco Bay’s water look so clear?

June 4, 2021

Peering over the side of the R/V Joseph E. Payne, Staff Scientist Mike Doan could see schools of small fish swimming in the water below,… Read more

Mike deploys our Portland Harbor Continuous Monitoring Station

Continuous Monitoring Stations are Game Changer

June 3, 2021

More than 700 Friends have contributed $1.5 million to help maintain three stations for a decade. Casco Bay is invaluable to the economy and quality… Read more

Join us: new stations, a celebration, and data!

May 20, 2021

As spring settles on Casco Bay, ospreys return to their nests, and alewives leave the sea and swim upriver to spawn in freshwater. The arrival… Read more



Volunteer Water Reporters are reporting what they see on Casco Bay and you can too.

We rely on volunteers to report conditions around the Bay. By joining our observing network, you can help us keep an eye on the Bay we all share and love!


Friends of Casco Bay’s Successes

The impact of Friends of Casco Bay over three decades

Friends of Casco Bay has a long history of success. Since our founding in 1989, our work-with, science-based approach has moved the needle toward a… Read more


View our most recent videos:



How you can help:


Photograph by Kevin Morris


Photograph by Dave Dostie

Stay informed by signing up for our emails


We’re proud members of


Cover photo: Photograph by Kevin Morris