diff --git a/.changeset/many-rules-kick.md b/.changeset/many-rules-kick.md
new file mode 100644
index 000000000000..9befc7fe2875
--- /dev/null
+++ b/.changeset/many-rules-kick.md
@@ -0,0 +1,7 @@
+---
+'astro': patch
+---
+
+Improves tailwind config file detection when adding the tailwind integration using `astro add tailwind`
+
+Tailwind config file ending in `.ts`, `.mts` or `.cts` will now be used instead of creating a new `tailwind.config.mjs` when the tailwind integration is added using `astro add tailwind`.
diff --git a/packages/astro/src/cli/add/index.ts b/packages/astro/src/cli/add/index.ts
index 74a4f73626f2..dcc4859f817e 100644
--- a/packages/astro/src/cli/add/index.ts
+++ b/packages/astro/src/cli/add/index.ts
@@ -160,6 +160,9 @@ export async function add(names: string[], { flags }: AddOptions) {
 					possibleConfigFiles: [
 						'./tailwind.config.cjs',
 						'./tailwind.config.mjs',
+						'./tailwind.config.ts',
+						'./tailwind.config.mts',
+						'./tailwind.config.cts',
 						'./tailwind.config.js',
 					],
 					defaultConfigFile: './tailwind.config.mjs',