Where to Find and Catch Dewott
From Pokemon Go Wiki
Dewott are found and captured in Nest and Habitat locations.
Nests
Dewott Nests are locations that consistently spawn Dewott.
Habitats
Dewott Habitats are spawn locations where Dewott is likely to be encountered, but not guaranteed the way a Nest is.
Additional Tips and Information
Best Nests
If you know a really good nest or any of the nests above is really good, list them here: