diff --git a/.changeset/lemon-garlics-pretend.md b/.changeset/lemon-garlics-pretend.md
new file mode 100644
index 000000000000..d2d7b91b6ca3
--- /dev/null
+++ b/.changeset/lemon-garlics-pretend.md
@@ -0,0 +1,5 @@
+---
+"@astrojs/vercel": patch
+---
+
+Marks the `speedInsights` configuration as deprecated. Vercel has migrated features of the Speed Insights API into a framework-agnostic library with `@vercel/speed-insights`. See [Vercel Speed Insights Quickstart](https://vercel.com/docs/speed-insights/quickstart) for instructions on how to use the library instead.
diff --git a/packages/integrations/vercel/src/serverless/adapter.ts b/packages/integrations/vercel/src/serverless/adapter.ts
index 185ae5d92bc6..6b4fe0e3d4c7 100644
--- a/packages/integrations/vercel/src/serverless/adapter.ts
+++ b/packages/integrations/vercel/src/serverless/adapter.ts
@@ -74,7 +74,13 @@ export interface VercelServerlessConfig {
 	/** Configuration for [Vercel Web Analytics](https://vercel.com/docs/concepts/analytics). */
 	webAnalytics?: VercelWebAnalyticsConfig;
 
-	/** Configuration for [Vercel Speed Insights](https://vercel.com/docs/concepts/speed-insights). */
+	/**
+	 * @deprecated This option lets you configure the legacy speed insights API which is now deprecated by Vercel.
+	 * 
+	 * See [Vercel Speed Insights Quickstart](https://vercel.com/docs/speed-insights/quickstart) for instructions on how to use the library instead.
+	 * 
+	 * https://vercel.com/docs/speed-insights/quickstart
+	 */
 	speedInsights?: VercelSpeedInsightsConfig;
 
 	/** Force files to be bundled with your function. This is helpful when you notice missing files. */
diff --git a/packages/integrations/vercel/src/static/adapter.ts b/packages/integrations/vercel/src/static/adapter.ts
index cbd7cb51ad93..0c6158cf6233 100644
--- a/packages/integrations/vercel/src/static/adapter.ts
+++ b/packages/integrations/vercel/src/static/adapter.ts
@@ -42,6 +42,13 @@ function getAdapter(): AstroAdapter {
 
 export interface VercelStaticConfig {
 	webAnalytics?: VercelWebAnalyticsConfig;
+	/**
+	 * @deprecated This option lets you configure the legacy speed insights API which is now deprecated by Vercel.
+	 * 
+	 * See [Vercel Speed Insights Quickstart](https://vercel.com/docs/speed-insights/quickstart) for instructions on how to use the library instead.
+	 * 
+	 * https://vercel.com/docs/speed-insights/quickstart
+	 */
 	speedInsights?: VercelSpeedInsightsConfig;
 	imageService?: boolean;
 	imagesConfig?: VercelImageConfig;