diff --git a/.changeset/tasty-teeth-do.md b/.changeset/tasty-teeth-do.md
new file mode 100644
index 000000000..7f6378f6e
--- /dev/null
+++ b/.changeset/tasty-teeth-do.md
@@ -0,0 +1,5 @@
+---
+"@opennextjs/cloudflare": patch
+---
+
+wrangler should not load .env files
diff --git a/packages/cloudflare/src/cli/utils/run-wrangler.ts b/packages/cloudflare/src/cli/utils/run-wrangler.ts
index 9bf4aa0e1..2ecb3cfb9 100644
--- a/packages/cloudflare/src/cli/utils/run-wrangler.ts
+++ b/packages/cloudflare/src/cli/utils/run-wrangler.ts
@@ -76,6 +76,10 @@ export function runWrangler(options: BuildOptions, args: string[], wranglerOpts:
 			env: {
 				...process.env,
 				...(wranglerOpts.logging === "error" ? { WRANGLER_LOG: "error" } : undefined),
+				// `.env` files are handled by the adapter.
+				// Wrangler would load `.env.<wrangler env>` while we should load `.env.<process.env.NEXTJS_ENV>`
+				// See https://opennext.js.org/cloudflare/howtos/env-vars
+				CLOUDFLARE_LOAD_DEV_VARS_FROM_DOT_ENV: "false",
 			},
 		}
 	);