diff --git a/.gitignore b/.gitignore
index 2afcd194..b96440f8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,6 +34,9 @@ microwaveprop-*.tar
 # GRIB2 test fixtures (large binary files, downloaded on-demand)
 /test/fixtures/grib2/*.grib2
 
+# Git worktrees
+/.worktrees/
+
 # OS files
 .DS_Store
 Thumbs.db