Where to Find and Catch Samurott
From Pokemon Go Wiki
Samurott are found and captured in Nest and Habitat locations.
Nests
Samurott Nests are locations that consistently spawn Samurott.
Habitats
Samurott Habitats are spawn locations where Samurott 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: