diff --git a/homeassistant/components/homekit/accessories.py b/homeassistant/components/homekit/accessories.py
index 88422b5c957..5a1e9bc1ea2 100644
--- a/homeassistant/components/homekit/accessories.py
+++ b/homeassistant/components/homekit/accessories.py
@@ -465,7 +465,9 @@ class HomeAccessory(Accessory):  # type: ignore[misc]
     def async_update_state_callback(self, new_state: State | None) -> None:
         """Handle state change listener callback."""
         _LOGGER.debug("New_state: %s", new_state)
-        if new_state is None:
+        # HomeKit handles unavailable state via the available property
+        # so we should not propagate it here
+        if new_state is None or new_state.state == STATE_UNAVAILABLE:
             return
         battery_state = None
         battery_charging_state = None
diff --git a/tests/components/homekit/test_type_covers.py b/tests/components/homekit/test_type_covers.py
index 9da576b6a0e..b8841289611 100644
--- a/tests/components/homekit/test_type_covers.py
+++ b/tests/components/homekit/test_type_covers.py
@@ -74,17 +74,19 @@ async def test_garage_door_open_close(hass: HomeAssistant, hk_driver, events) ->
     assert acc.char_obstruction_detected.value is True
 
     hass.states.async_set(
-        entity_id, STATE_UNAVAILABLE, {ATTR_OBSTRUCTION_DETECTED: False}
+        entity_id, STATE_UNAVAILABLE, {ATTR_OBSTRUCTION_DETECTED: True}
     )
     await hass.async_block_till_done()
     assert acc.char_current_state.value == HK_DOOR_OPEN
     assert acc.char_target_state.value == HK_DOOR_OPEN
-    assert acc.char_obstruction_detected.value is False
+    assert acc.char_obstruction_detected.value is True
+    assert acc.available is False
 
     hass.states.async_set(entity_id, STATE_UNKNOWN)
     await hass.async_block_till_done()
     assert acc.char_current_state.value == HK_DOOR_OPEN
     assert acc.char_target_state.value == HK_DOOR_OPEN
+    assert acc.available is True
 
     # Set from HomeKit
     call_close_cover = async_mock_service(hass, DOMAIN, "close_cover")
diff --git a/tests/components/homekit/test_type_locks.py b/tests/components/homekit/test_type_locks.py
index 32f1561644e..dc614ee54c4 100644
--- a/tests/components/homekit/test_type_locks.py
+++ b/tests/components/homekit/test_type_locks.py
@@ -13,6 +13,7 @@ from homeassistant.const import (
     ATTR_CODE,
     ATTR_ENTITY_ID,
     STATE_LOCKED,
+    STATE_UNAVAILABLE,
     STATE_UNKNOWN,
     STATE_UNLOCKED,
 )
@@ -68,10 +69,32 @@ async def test_lock_unlock(hass: HomeAssistant, hk_driver, events) -> None:
     assert acc.char_current_state.value == 3
     assert acc.char_target_state.value == 0
 
-    hass.states.async_remove(entity_id)
+    # Unavailable should keep last state
+    # but set the accessory to not available
+    hass.states.async_set(entity_id, STATE_UNAVAILABLE)
     await hass.async_block_till_done()
     assert acc.char_current_state.value == 3
     assert acc.char_target_state.value == 0
+    assert acc.available is False
+
+    hass.states.async_set(entity_id, STATE_UNLOCKED)
+    await hass.async_block_till_done()
+    assert acc.char_current_state.value == 0
+    assert acc.char_target_state.value == 0
+    assert acc.available is True
+
+    # Unavailable should keep last state
+    # but set the accessory to not available
+    hass.states.async_set(entity_id, STATE_UNAVAILABLE)
+    await hass.async_block_till_done()
+    assert acc.char_current_state.value == 0
+    assert acc.char_target_state.value == 0
+    assert acc.available is False
+
+    hass.states.async_remove(entity_id)
+    await hass.async_block_till_done()
+    assert acc.char_current_state.value == 0
+    assert acc.char_target_state.value == 0
 
     # Set from HomeKit
     call_lock = async_mock_service(hass, DOMAIN, "lock")