diff --git a/homeassistant/components/reolink/diagnostics.py b/homeassistant/components/reolink/diagnostics.py
index d940bda2680..48f6b709c23 100644
--- a/homeassistant/components/reolink/diagnostics.py
+++ b/homeassistant/components/reolink/diagnostics.py
@@ -24,6 +24,8 @@ async def async_get_config_entry_diagnostics(
         IPC_cam[ch]["hardware version"] = api.camera_hardware_version(ch)
         IPC_cam[ch]["firmware version"] = api.camera_sw_version(ch)
         IPC_cam[ch]["encoding main"] = await api.get_encoding(ch)
+        if (signal := api.wifi_signal(ch)) is not None:
+            IPC_cam[ch]["WiFi signal"] = signal
 
     chimes: dict[int, dict[str, Any]] = {}
     for chime in api.chime_list:
diff --git a/homeassistant/components/reolink/sensor.py b/homeassistant/components/reolink/sensor.py
index d63655d1173..cd03f2b59b5 100644
--- a/homeassistant/components/reolink/sensor.py
+++ b/homeassistant/components/reolink/sensor.py
@@ -123,6 +123,18 @@ SENSORS = (
         value=lambda api, ch: api.baichuan.day_night_state(ch),
         supported=lambda api, ch: api.supported(ch, "day_night_state"),
     ),
+    ReolinkSensorEntityDescription(
+        key="wifi_signal",
+        cmd_key="115",
+        translation_key="wifi_signal",
+        device_class=SensorDeviceClass.SIGNAL_STRENGTH,
+        state_class=SensorStateClass.MEASUREMENT,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        native_unit_of_measurement=SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
+        entity_registry_enabled_default=False,
+        value=lambda api, ch: api.wifi_signal(ch),
+        supported=lambda api, ch: api.supported(ch, "wifi"),
+    ),
 )
 
 HOST_SENSORS = (
diff --git a/tests/components/reolink/conftest.py b/tests/components/reolink/conftest.py
index a3e28f49194..4e2179dcd2c 100644
--- a/tests/components/reolink/conftest.py
+++ b/tests/components/reolink/conftest.py
@@ -123,7 +123,7 @@ def _init_host_mock(host_mock: MagicMock) -> None:
     host_mock.timeout = 60
     host_mock.renewtimer.return_value = 600
     host_mock.wifi_connection = False
-    host_mock.wifi_signal.return_value = None
+    host_mock.wifi_signal.return_value = -45
     host_mock.whiteled_mode_list.return_value = []
     host_mock.zoom_range.return_value = {
         "zoom": {"pos": {"min": 0, "max": 100}},
diff --git a/tests/components/reolink/snapshots/test_diagnostics.ambr b/tests/components/reolink/snapshots/test_diagnostics.ambr
index a6d7f14a149..25a9dc299aa 100644
--- a/tests/components/reolink/snapshots/test_diagnostics.ambr
+++ b/tests/components/reolink/snapshots/test_diagnostics.ambr
@@ -28,6 +28,7 @@
     'HTTPS': True,
     'IPC cams': dict({
       '0': dict({
+        'WiFi signal': -45,
         'encoding main': 'h264',
         'firmware version': 'v1.1.0.0.0.0000',
         'hardware version': 'IPC_00001',
@@ -38,7 +39,7 @@
     'RTMP enabled': True,
     'RTSP enabled': True,
     'WiFi connection': False,
-    'WiFi signal': None,
+    'WiFi signal': -45,
     'abilities': dict({
       'abilityChn': list([
         dict({
diff --git a/tests/components/reolink/test_sensor.py b/tests/components/reolink/test_sensor.py
index 3a120889a98..c3fe8d89951 100644
--- a/tests/components/reolink/test_sensor.py
+++ b/tests/components/reolink/test_sensor.py
@@ -22,7 +22,7 @@ async def test_sensors(
     """Test sensor entities."""
     reolink_connect.ptz_pan_position.return_value = 1200
     reolink_connect.wifi_connection = True
-    reolink_connect.wifi_signal.return_value = 3
+    reolink_connect.wifi_signal.return_value = -55
     reolink_connect.hdd_list = [0]
     reolink_connect.hdd_storage.return_value = 95
 
@@ -35,7 +35,7 @@ async def test_sensors(
     assert hass.states.get(entity_id).state == "1200"
 
     entity_id = f"{Platform.SENSOR}.{TEST_NVR_NAME}_wi_fi_signal"
-    assert hass.states.get(entity_id).state == "3"
+    assert hass.states.get(entity_id).state == "-55"
 
     entity_id = f"{Platform.SENSOR}.{TEST_NVR_NAME}_sd_0_storage"
     assert hass.states.get(entity_id).state == "95"