diff --git a/homeassistant/components/fritz/diagnostics.py b/homeassistant/components/fritz/diagnostics.py
index b9ae9edf04df..e8cad15ec3b9 100644
--- a/homeassistant/components/fritz/diagnostics.py
+++ b/homeassistant/components/fritz/diagnostics.py
@@ -46,6 +46,9 @@ async def async_get_config_entry_diagnostics(
                 }
                 for _, device in avm_wrapper.devices.items()
             ],
+            "cpu_temperatures": await hass.async_add_executor_job(
+                avm_wrapper.fritz_status.get_cpu_temperatures
+            ),
             "wan_link_properties": await avm_wrapper.async_get_wan_link_properties(),
         },
     }
diff --git a/tests/components/fritz/snapshots/test_diagnostics.ambr b/tests/components/fritz/snapshots/test_diagnostics.ambr
index c2ca866ceb6e..dead09cae4a8 100644
--- a/tests/components/fritz/snapshots/test_diagnostics.ambr
+++ b/tests/components/fritz/snapshots/test_diagnostics.ambr
@@ -12,6 +12,11 @@
         }),
       ]),
       'connection_type': 'WANPPPConnection',
+      'cpu_temperatures': list([
+        69,
+        68,
+        67,
+      ]),
       'current_firmware': '7.29',
       'discovered_services': list([
         'DeviceInfo1',