diff --git a/homeassistant/components/water_heater/__init__.py b/homeassistant/components/water_heater/__init__.py
index ddef4e7366c..f2744416900 100644
--- a/homeassistant/components/water_heater/__init__.py
+++ b/homeassistant/components/water_heater/__init__.py
@@ -401,6 +401,19 @@ class WaterHeaterEntity(Entity, cached_properties=CACHED_PROPERTIES_WITH_ATTR_):
         """Return the list of supported features."""
         return self._attr_supported_features
 
+    @property
+    def supported_features_compat(self) -> WaterHeaterEntityFeature:
+        """Return the supported features as WaterHeaterEntityFeature.
+
+        Remove this compatibility shim in 2025.1 or later.
+        """
+        features = self.supported_features
+        if type(features) is int:  # noqa: E721
+            new_features = WaterHeaterEntityFeature(features)
+            self._report_deprecated_supported_features_values(new_features)
+            return new_features
+        return features
+
 
 async def async_service_away_mode(
     entity: WaterHeaterEntity, service: ServiceCall
diff --git a/tests/components/water_heater/test_init.py b/tests/components/water_heater/test_init.py
index 8a7d76bd891..0d33f3a9e93 100644
--- a/tests/components/water_heater/test_init.py
+++ b/tests/components/water_heater/test_init.py
@@ -115,3 +115,23 @@ def test_deprecated_constants(
     import_and_test_deprecated_constant_enum(
         caplog, water_heater, enum, "SUPPORT_", "2025.1"
     )
+
+
+def test_deprecated_supported_features_ints(caplog: pytest.LogCaptureFixture) -> None:
+    """Test deprecated supported features ints."""
+
+    class MockWaterHeaterEntity(WaterHeaterEntity):
+        @property
+        def supported_features(self) -> int:
+            """Return supported features."""
+            return 1
+
+    entity = MockWaterHeaterEntity()
+    assert entity.supported_features_compat is WaterHeaterEntityFeature(1)
+    assert "MockWaterHeaterEntity" in caplog.text
+    assert "is using deprecated supported features values" in caplog.text
+    assert "Instead it should use" in caplog.text
+    assert "WaterHeaterEntityFeature.TARGET_TEMPERATURE" in caplog.text
+    caplog.clear()
+    assert entity.supported_features_compat is WaterHeaterEntityFeature(1)
+    assert "is using deprecated supported features values" not in caplog.text