diff --git a/homeassistant/components/tplink/icons.json b/homeassistant/components/tplink/icons.json
index 96ea8f41bb7..75d15373202 100644
--- a/homeassistant/components/tplink/icons.json
+++ b/homeassistant/components/tplink/icons.json
@@ -88,6 +88,9 @@
       },
       "alarm_source": {
         "default": "mdi:bell"
+      },
+      "water_alert_timestamp": {
+        "default": "mdi:clock-alert-outline"
       }
     },
     "number": {
diff --git a/homeassistant/components/tplink/sensor.py b/homeassistant/components/tplink/sensor.py
index f3d3b1c7b31..809d9002768 100644
--- a/homeassistant/components/tplink/sensor.py
+++ b/homeassistant/components/tplink/sensor.py
@@ -97,6 +97,10 @@ SENSOR_DESCRIPTIONS: tuple[TPLinkSensorEntityDescription, ...] = (
         key="device_time",
         device_class=SensorDeviceClass.TIMESTAMP,
     ),
+    TPLinkSensorEntityDescription(
+        key="water_alert_timestamp",
+        device_class=SensorDeviceClass.TIMESTAMP,
+    ),
     TPLinkSensorEntityDescription(
         key="humidity",
         device_class=SensorDeviceClass.HUMIDITY,
diff --git a/homeassistant/components/tplink/strings.json b/homeassistant/components/tplink/strings.json
index e4eb484aec9..66380434d32 100644
--- a/homeassistant/components/tplink/strings.json
+++ b/homeassistant/components/tplink/strings.json
@@ -159,6 +159,9 @@
       "device_time": {
         "name": "Device time"
       },
+      "water_alert_timestamp": {
+        "name": "Last water leak alert"
+      },
       "auto_off_at": {
         "name": "Auto off at"
       },
diff --git a/tests/components/tplink/fixtures/features.json b/tests/components/tplink/fixtures/features.json
index 550592d3f48..d3526adec8a 100644
--- a/tests/components/tplink/fixtures/features.json
+++ b/tests/components/tplink/fixtures/features.json
@@ -303,5 +303,10 @@
     "type": "Choice",
     "category": "Config",
     "choices": ["low", "normal", "high"]
+  },
+  "water_alert_timestamp": {
+    "type": "Sensor",
+    "category": "Info",
+    "value": "2024-06-24 10:03:11.046643+01:00"
   }
 }
diff --git a/tests/components/tplink/snapshots/test_sensor.ambr b/tests/components/tplink/snapshots/test_sensor.ambr
index 39682cd4a17..739f02e51f0 100644
--- a/tests/components/tplink/snapshots/test_sensor.ambr
+++ b/tests/components/tplink/snapshots/test_sensor.ambr
@@ -358,6 +358,53 @@
     'state': '12',
   })
 # ---
+# name: test_states[sensor.my_device_last_water_leak_alert-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
+    'entity_id': 'sensor.my_device_last_water_leak_alert',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'options': dict({
+    }),
+    'original_device_class': <SensorDeviceClass.TIMESTAMP: 'timestamp'>,
+    'original_icon': None,
+    'original_name': 'Last water leak alert',
+    'platform': 'tplink',
+    'previous_unique_id': None,
+    'supported_features': 0,
+    'translation_key': 'water_alert_timestamp',
+    'unique_id': '123456789ABCDEFGH_water_alert_timestamp',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_states[sensor.my_device_last_water_leak_alert-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'timestamp',
+      'friendly_name': 'my_device Last water leak alert',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.my_device_last_water_leak_alert',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': '2024-06-24T09:03:11+00:00',
+  })
+# ---
 # name: test_states[sensor.my_device_on_since-entry]
   EntityRegistryEntrySnapshot({
     'aliases': set({