diff --git a/packages/nextjs/src/config/loaders/proxyLoader.ts b/packages/nextjs/src/config/loaders/proxyLoader.ts
index c6bee0ec9f3a..42aa1a7a230f 100644
--- a/packages/nextjs/src/config/loaders/proxyLoader.ts
+++ b/packages/nextjs/src/config/loaders/proxyLoader.ts
@@ -9,6 +9,7 @@ type LoaderOptions = {
   pagesDir: string;
   pageExtensionRegex: string;
   excludeServerRoutes: Array<RegExp | string>;
+  isEdgeRuntime: boolean;
 };
 
 /**
@@ -22,8 +23,14 @@ export default async function proxyLoader(this: LoaderThis<LoaderOptions>, userC
     pagesDir,
     pageExtensionRegex,
     excludeServerRoutes = [],
+    isEdgeRuntime,
   } = 'getOptions' in this ? this.getOptions() : this.query;
 
+  // We currently don't support the edge runtime
+  if (isEdgeRuntime) {
+    return userCode;
+  }
+
   // Get the parameterized route name from this page's filepath
   const parameterizedRoute = path
     // Get the path of the file insde of the pages directory
diff --git a/packages/nextjs/src/config/templates/apiProxyLoaderTemplate.ts b/packages/nextjs/src/config/templates/apiProxyLoaderTemplate.ts
index 230eb55e457f..1cd7c40181eb 100644
--- a/packages/nextjs/src/config/templates/apiProxyLoaderTemplate.ts
+++ b/packages/nextjs/src/config/templates/apiProxyLoaderTemplate.ts
@@ -23,7 +23,7 @@ type NextApiModule = (
     }
   // CJS export
   | NextApiHandler
-) & { config?: PageConfig & { runtime?: string } };
+) & { config?: PageConfig };
 
 const userApiModule = origModule as NextApiModule;
 
@@ -53,21 +53,7 @@ export const config = {
   },
 };
 
-// This is a variable that Next.js will string replace during build with a string if run in an edge runtime from Next.js
-// v12.2.1-canary.3 onwards:
-// https://github.com/vercel/next.js/blob/166e5fb9b92f64c4b5d1f6560a05e2b9778c16fb/packages/next/build/webpack-config.ts#L206
-// https://edge-runtime.vercel.sh/features/available-apis#addressing-the-runtime
-declare const EdgeRuntime: string | undefined;
-
-let exportedHandler;
-
-if (typeof EdgeRuntime === 'string') {
-  exportedHandler = userProvidedHandler;
-} else {
-  exportedHandler = userProvidedHandler ? Sentry.withSentryAPI(userProvidedHandler, '__ROUTE__') : undefined;
-}
-
-export default exportedHandler;
+export default userProvidedHandler ? Sentry.withSentryAPI(userProvidedHandler, '__ROUTE__') : undefined;
 
 // Re-export anything exported by the page module we're wrapping. When processing this code, Rollup is smart enough to
 // not include anything whose name matchs something we've explicitly exported above.
diff --git a/packages/nextjs/src/config/types.ts b/packages/nextjs/src/config/types.ts
index f596252fd472..6a815664e527 100644
--- a/packages/nextjs/src/config/types.ts
+++ b/packages/nextjs/src/config/types.ts
@@ -137,7 +137,7 @@ export type BuildContext = {
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
   defaultLoaders: any;
   totalPages: number;
-  nextRuntime?: 'nodejs' | 'edge';
+  nextRuntime?: 'nodejs' | 'edge'; // Added in Next.js 12+
 };
 
 /**
diff --git a/packages/nextjs/src/config/webpack.ts b/packages/nextjs/src/config/webpack.ts
index 988c6cc8b4b3..15cf51e2b742 100644
--- a/packages/nextjs/src/config/webpack.ts
+++ b/packages/nextjs/src/config/webpack.ts
@@ -85,6 +85,13 @@ export function constructWebpackConfigFunction(
     // Add a loader which will inject code that sets global values
     addValueInjectionLoader(newConfig, userNextConfig, userSentryOptions);
 
+    if (buildContext.nextRuntime === 'edge') {
+      // eslint-disable-next-line no-console
+      console.warn(
+        '[@sentry/nextjs] You are using edge functions or middleware. Please note that Sentry does not yet support error monitoring for these features.',
+      );
+    }
+
     if (isServer) {
       if (userSentryOptions.autoInstrumentServerFunctions !== false) {
         const pagesDir = newConfig.resolve?.alias?.['private-next-pages'] as string;
@@ -102,6 +109,7 @@ export function constructWebpackConfigFunction(
                 pagesDir,
                 pageExtensionRegex,
                 excludeServerRoutes: userSentryOptions.excludeServerRoutes,
+                isEdgeRuntime: buildContext.nextRuntime === 'edge',
               },
             },
           ],
@@ -305,7 +313,15 @@ async function addSentryToEntryProperty(
 
   // inject into all entry points which might contain user's code
   for (const entryPointName in newEntryProperty) {
-    if (shouldAddSentryToEntryPoint(entryPointName, isServer, userSentryOptions.excludeServerRoutes, isDev)) {
+    if (
+      shouldAddSentryToEntryPoint(
+        entryPointName,
+        isServer,
+        userSentryOptions.excludeServerRoutes,
+        isDev,
+        buildContext.nextRuntime === 'edge',
+      )
+    ) {
       addFilesToExistingEntryPoint(newEntryProperty, entryPointName, filesToInject);
     } else {
       if (
@@ -432,7 +448,13 @@ function shouldAddSentryToEntryPoint(
   isServer: boolean,
   excludeServerRoutes: Array<string | RegExp> = [],
   isDev: boolean,
+  isEdgeRuntime: boolean,
 ): boolean {
+  // We don't support the Edge runtime yet
+  if (isEdgeRuntime) {
+    return false;
+  }
+
   // On the server side, by default we inject the `Sentry.init()` code into every page (with a few exceptions).
   if (isServer) {
     const entryPointRoute = entryPointName.replace(/^pages/, '');
@@ -529,7 +551,13 @@ export function getWebpackPluginOptions(
     stripPrefix: ['webpack://_N_E/'],
     urlPrefix,
     entries: (entryPointName: string) =>
-      shouldAddSentryToEntryPoint(entryPointName, isServer, userSentryOptions.excludeServerRoutes, isDev),
+      shouldAddSentryToEntryPoint(
+        entryPointName,
+        isServer,
+        userSentryOptions.excludeServerRoutes,
+        isDev,
+        buildContext.nextRuntime === 'edge',
+      ),
     release: getSentryRelease(buildId),
     dryRun: isDev,
   });
diff --git a/packages/nextjs/src/index.client.ts b/packages/nextjs/src/index.client.ts
index 2d9e29d48ac8..98ea9928b8ed 100644
--- a/packages/nextjs/src/index.client.ts
+++ b/packages/nextjs/src/index.client.ts
@@ -2,7 +2,6 @@ import { RewriteFrames } from '@sentry/integrations';
 import { configureScope, init as reactInit, Integrations } from '@sentry/react';
 import { BrowserTracing, defaultRequestInstrumentationOptions, hasTracingEnabled } from '@sentry/tracing';
 import { EventProcessor } from '@sentry/types';
-import { logger } from '@sentry/utils';
 
 import { nextRouterInstrumentation } from './performance/client';
 import { buildMetadata } from './utils/metadata';
@@ -31,26 +30,12 @@ export { BrowserTracing };
 // Treeshakable guard to remove all code related to tracing
 declare const __SENTRY_TRACING__: boolean;
 
-// This is a variable that Next.js will string replace during build with a string if run in an edge runtime from Next.js
-// v12.2.1-canary.3 onwards:
-// https://github.com/vercel/next.js/blob/166e5fb9b92f64c4b5d1f6560a05e2b9778c16fb/packages/next/build/webpack-config.ts#L206
-// https://edge-runtime.vercel.sh/features/available-apis#addressing-the-runtime
-declare const EdgeRuntime: string | undefined;
-
 const globalWithInjectedValues = global as typeof global & {
   __rewriteFramesAssetPrefixPath__: string;
 };
 
 /** Inits the Sentry NextJS SDK on the browser with the React SDK. */
 export function init(options: NextjsOptions): void {
-  if (typeof EdgeRuntime === 'string') {
-    // If the SDK is imported when using the Vercel Edge Runtime, it will import the browser SDK, even though it is
-    // running the server part of a Next.js application. We can use the `EdgeRuntime` to check for that case and make
-    // the init call a no-op. This will prevent the SDK from crashing on the Edge Runtime.
-    __DEBUG_BUILD__ && logger.log('Vercel Edge Runtime detected. Will not initialize SDK.');
-    return;
-  }
-
   applyTunnelRouteOption(options);
   buildMetadata(options, ['nextjs', 'react']);
   options.environment = options.environment || process.env.NODE_ENV;
diff --git a/packages/nextjs/src/index.server.ts b/packages/nextjs/src/index.server.ts
index 922be7aa09b6..0500bd802300 100644
--- a/packages/nextjs/src/index.server.ts
+++ b/packages/nextjs/src/index.server.ts
@@ -30,12 +30,6 @@ const globalWithInjectedValues = global as typeof global & {
 
 const domain = domainModule as typeof domainModule & { active: (domainModule.Domain & Carrier) | null };
 
-// This is a variable that Next.js will string replace during build with a string if run in an edge runtime from Next.js
-// v12.2.1-canary.3 onwards:
-// https://github.com/vercel/next.js/blob/166e5fb9b92f64c4b5d1f6560a05e2b9778c16fb/packages/next/build/webpack-config.ts#L206
-// https://edge-runtime.vercel.sh/features/available-apis#addressing-the-runtime
-declare const EdgeRuntime: string | undefined;
-
 // Exporting this constant means we can compute it without the linter complaining, even if we stop directly using it in
 // this file. It's important that it be computed as early as possible, because one of its indicators is seeing 'build'
 // (as in the CLI command `next build`) in `process.argv`. Later on in the build process, everything's been spun out
@@ -51,11 +45,6 @@ export function init(options: NextjsOptions): void {
     logger.enable();
   }
 
-  if (typeof EdgeRuntime === 'string') {
-    __DEBUG_BUILD__ && logger.log('Vercel Edge Runtime detected. Will not initialize SDK.');
-    return;
-  }
-
   __DEBUG_BUILD__ && logger.log('Initializing SDK...');
 
   if (sdkAlreadyInitialized()) {