diff --git a/homeassistant/components/mqtt/climate.py b/homeassistant/components/mqtt/climate.py
index c3e3448da0a..3df9db0d5d0 100644
--- a/homeassistant/components/mqtt/climate.py
+++ b/homeassistant/components/mqtt/climate.py
@@ -703,7 +703,7 @@ class MqttClimate(MqttTemperatureControlEntity, ClimateEntity):
                 config.get(key), entity=self
             ).async_render
 
-        support = ClimateEntityFeature(0)
+        support = ClimateEntityFeature.TURN_ON | ClimateEntityFeature.TURN_OFF
         if (self._topic[CONF_TEMP_STATE_TOPIC] is not None) or (
             self._topic[CONF_TEMP_COMMAND_TOPIC] is not None
         ):
diff --git a/tests/components/mqtt/test_climate.py b/tests/components/mqtt/test_climate.py
index b1c6cf5ddd8..6fcb219f6b6 100644
--- a/tests/components/mqtt/test_climate.py
+++ b/tests/components/mqtt/test_climate.py
@@ -121,6 +121,17 @@ async def test_setup_params(
     assert state.attributes.get("max_temp") == DEFAULT_MAX_TEMP
     assert state.attributes.get("min_humidity") == DEFAULT_MIN_HUMIDITY
     assert state.attributes.get("max_humidity") == DEFAULT_MAX_HUMIDITY
+    assert (
+        state.attributes.get("supported_features")
+        == ClimateEntityFeature.TARGET_TEMPERATURE
+        | ClimateEntityFeature.TARGET_TEMPERATURE_RANGE
+        | ClimateEntityFeature.TARGET_HUMIDITY
+        | ClimateEntityFeature.FAN_MODE
+        | ClimateEntityFeature.PRESET_MODE
+        | ClimateEntityFeature.SWING_MODE
+        | ClimateEntityFeature.TURN_OFF
+        | ClimateEntityFeature.TURN_ON
+    )
 
 
 @pytest.mark.parametrize(