diff --git a/src/actions/ble.ts b/src/actions/ble.ts
index d6ad1ec1..19f4785d 100644
--- a/src/actions/ble.ts
+++ b/src/actions/ble.ts
@@ -51,6 +51,7 @@ export function didConnect(): BleDeviceDidConnectAction {
 
 export enum BleDeviceFailToConnectReasonType {
     NoWebBluetooth = 'ble.device.didFailToConnect.noWebBluetooth',
+    NoBluetooth = 'ble.device.didFailToConnect.noBluetooth',
     Canceled = 'ble.device.didFailToConnect.canceled',
     NoGatt = 'ble.device.didFailToConnect.noGatt',
     NoService = 'ble.device.didFailToConnect.noService',
@@ -63,6 +64,8 @@ type Reason<T extends BleDeviceFailToConnectReasonType> = {
 
 export type BleDeviceFailToConnectNoWebBluetoothReason = Reason<BleDeviceFailToConnectReasonType.NoWebBluetooth>;
 
+export type BleDeviceFailToConnectNoBluetoothReason = Reason<BleDeviceFailToConnectReasonType.NoBluetooth>;
+
 export type BleDeviceFailToConnectCanceledReason = Reason<BleDeviceFailToConnectReasonType.Canceled>;
 
 export type BleDeviceFailToConnectNoGattReason = Reason<BleDeviceFailToConnectReasonType.NoGatt>;
@@ -75,6 +78,7 @@ export type BleDeviceFailToConnectUnknownReason = Reason<BleDeviceFailToConnectR
 
 export type BleDeviceDidFailToConnectReason =
     | BleDeviceFailToConnectNoWebBluetoothReason
+    | BleDeviceFailToConnectNoBluetoothReason
     | BleDeviceFailToConnectCanceledReason
     | BleDeviceFailToConnectNoGattReason
     | BleDeviceFailToConnectNoServiceReason
diff --git a/src/actions/lwp3-bootloader.ts b/src/actions/lwp3-bootloader.ts
index 07c74789..9bf35a9f 100644
--- a/src/actions/lwp3-bootloader.ts
+++ b/src/actions/lwp3-bootloader.ts
@@ -79,6 +79,8 @@ export function disconnect(): BootloaderConnectionDisconnectAction {
 export enum BootloaderConnectionFailureReason {
     /** Web Bluetooth is not available */
     NoWebBluetooth = 'no-web-bluetooth',
+    /** Bluetooth is not available */
+    NoBluetooth = 'no-bluetooth',
     /** Connected but failed to find the bootloader GATT service */
     GattServiceNotFound = 'gatt-service-not-found',
     /** The connection was canceled */
@@ -93,6 +95,8 @@ type Reason<T extends BootloaderConnectionFailureReason> = {
 
 export type BootloaderConnectionFailToConnectNoWebBluetoothReason = Reason<BootloaderConnectionFailureReason.NoWebBluetooth>;
 
+export type BootloaderConnectionFailToConnectNoBluetoothReason = Reason<BootloaderConnectionFailureReason.NoBluetooth>;
+
 export type BootloaderConnectionFailToConnectGattServiceNotFoundReason = Reason<BootloaderConnectionFailureReason.GattServiceNotFound>;
 
 export type BootloaderConnectionFailToConnectCanceledReason = Reason<BootloaderConnectionFailureReason.Canceled>;
@@ -103,6 +107,7 @@ export type BootloaderConnectionFailToConnectUnknownReason = Reason<BootloaderCo
 
 export type BootloaderConnectionDidFailToConnectReason =
     | BootloaderConnectionFailToConnectNoWebBluetoothReason
+    | BootloaderConnectionFailToConnectNoBluetoothReason
     | BootloaderConnectionFailToConnectGattServiceNotFoundReason
     | BootloaderConnectionFailToConnectCanceledReason
     | BootloaderConnectionFailToConnectUnknownReason;
diff --git a/src/components/notification-i18n.en.json b/src/components/notification-i18n.en.json
index 7555b749..e5fb0bd5 100644
--- a/src/components/notification-i18n.en.json
+++ b/src/components/notification-i18n.en.json
@@ -5,6 +5,7 @@
         "gattPermission": "The web browser did not give permission to use Bluetooth Low Energy",
         "gattServiceNotFound": "Connected to hub but failed to get {serviceName} service. Try removing the \"{hubName}\" device in your OS Bluetooth settings, then try again.",
         "noWebBluetooth": "This web browser does not support Web Bluetooth or it is not enabled.",
+        "noBluetooth": "No Bluetooth adapter could be found. Bluetooth won't work.",
         "unexpectedError": "Unexpected error while trying to connect: {errorMessage}"
     },
     "editor": {
diff --git a/src/components/notification-i18n.ts b/src/components/notification-i18n.ts
index c519a1f6..8e39bf64 100644
--- a/src/components/notification-i18n.ts
+++ b/src/components/notification-i18n.ts
@@ -10,6 +10,7 @@ export enum MessageId {
     BleGattPermission = 'ble.gattPermission',
     BleGattServiceNotFound = 'ble.gattServiceNotFound',
     BleNoWebBluetooth = 'ble.noWebBluetooth',
+    BleNoBluetooth = 'ble.noBluetooth',
     FlashFirmwareTimedOut = 'flashFirmware.timedOut',
     FlashFirmwareBleError = 'flashFirmware.bleError',
     FlashFirmwareDisconnected = 'flashFirmware.disconnected',
diff --git a/src/sagas/ble-uart.ts b/src/sagas/ble-uart.ts
index a1b81493..8b346520 100644
--- a/src/sagas/ble-uart.ts
+++ b/src/sagas/ble-uart.ts
@@ -70,7 +70,11 @@ function* connect(_action: BleDeviceConnectAction): Generator {
         return;
     }
 
-    // TODO: check navigator.bluetooth.getAvailability()
+    const available = yield* call(() => navigator.bluetooth.getAvailability());
+    if (!available) {
+        yield* put(didFailToConnect({ reason: Reason.NoBluetooth }));
+        return;
+    }
 
     let device: BluetoothDevice;
     try {
diff --git a/src/sagas/lwp3-bootloader-ble.ts b/src/sagas/lwp3-bootloader-ble.ts
index 69ad67cd..338064fb 100644
--- a/src/sagas/lwp3-bootloader-ble.ts
+++ b/src/sagas/lwp3-bootloader-ble.ts
@@ -45,7 +45,11 @@ function* connect(_action: BootloaderConnectionAction): Generator {
         return;
     }
 
-    // TODO: check navigator.bluetooth.getAvailability()
+    const available = yield* call(() => navigator.bluetooth.getAvailability());
+    if (!available) {
+        yield* put(didFailToConnect(Reason.NoBluetooth));
+        return;
+    }
 
     let device: BluetoothDevice;
     try {
diff --git a/src/sagas/notification.test.ts b/src/sagas/notification.test.ts
index b7b114bc..0f456bc9 100644
--- a/src/sagas/notification.test.ts
+++ b/src/sagas/notification.test.ts
@@ -28,6 +28,7 @@ import notification from './notification';
 
 test.each([
     bleDidFailToConnect({ reason: BleDeviceFailToConnectReasonType.NoWebBluetooth }),
+    bleDidFailToConnect({ reason: BleDeviceFailToConnectReasonType.NoBluetooth }),
     bleDidFailToConnect({ reason: BleDeviceFailToConnectReasonType.NoGatt }),
     bleDidFailToConnect({ reason: BleDeviceFailToConnectReasonType.NoService }),
     bleDidFailToConnect({
@@ -38,6 +39,7 @@ test.each([
         message: 'test',
     }),
     bootloaderDidFailToConnect(BootloaderConnectionFailureReason.NoWebBluetooth),
+    bootloaderDidFailToConnect(BootloaderConnectionFailureReason.NoBluetooth),
     bootloaderDidFailToConnect(BootloaderConnectionFailureReason.GattServiceNotFound),
     storageChanged('test'),
     didFailToCompile(['reason']),
diff --git a/src/sagas/notification.ts b/src/sagas/notification.ts
index b9fb0c7a..d976198b 100644
--- a/src/sagas/notification.ts
+++ b/src/sagas/notification.ts
@@ -171,6 +171,9 @@ function* showBleDeviceDidFailToConnectError(
                 hubName: 'Pybricks Hub',
             });
             break;
+        case BleDeviceFailToConnectReasonType.NoBluetooth:
+            yield* showSingleton(Level.Error, MessageId.BleNoBluetooth);
+            break;
         case BleDeviceFailToConnectReasonType.NoWebBluetooth:
             yield* showSingleton(
                 Level.Error,
@@ -207,6 +210,9 @@ function* showBootloaderDidFailToConnectError(
                 ),
             );
             break;
+        case BootloaderConnectionFailureReason.NoBluetooth:
+            yield* showSingleton(Level.Error, MessageId.BleNoBluetooth);
+            break;
         case BootloaderConnectionFailureReason.Unknown:
             yield* showUnexpectedError(MessageId.BleUnexpectedError, action.err);
             break;