diff --git a/homeassistant/components/unifiprotect/alarm_control_panel.py b/homeassistant/components/unifiprotect/alarm_control_panel.py
index b9316cc2669f..472aa43a4c75 100644
--- a/homeassistant/components/unifiprotect/alarm_control_panel.py
+++ b/homeassistant/components/unifiprotect/alarm_control_panel.py
@@ -107,8 +107,9 @@ class ProtectNVRAlarmControlPanel(ProtectNVREntity, AlarmControlPanelEntity):
             self._attr_alarm_state = None
             return
         # arm_mode is delivered over the public devices websocket, so
-        # availability tracks the public WS health (like relay/siren), not the
-        # private connection the base class would otherwise apply for the NVR.
+        # availability tracks the public WS health, not the private connection
+        # the base class would otherwise apply for the NVR. The NVR carries no
+        # device state, so there is nothing else to gate on.
         self._attr_available = self.data.last_public_update_success
         # Fall back to DISARMED for unknown future status values rather than
         # rendering the entity as ``unknown``.
diff --git a/homeassistant/components/unifiprotect/entity.py b/homeassistant/components/unifiprotect/entity.py
index 8dd233c2184e..c00388d0f2c3 100644
--- a/homeassistant/components/unifiprotect/entity.py
+++ b/homeassistant/components/unifiprotect/entity.py
@@ -570,7 +570,10 @@ class ProtectFobEntity(Entity):
     ``ProtectApiClient.public_bootstrap.fobs`` and is refreshed over the public
     devices websocket, so it does not use the private-device machinery in
     :class:`BaseProtectEntity`. Availability follows the public websocket health
-    and the fob's presence in the bootstrap, mirroring the relay switch.
+    and the fob's presence in the bootstrap. Unlike every other public device it
+    deliberately ignores ``state``: Protect models a fob's reachability as
+    ``away_state``, which the status sensor surfaces, so gating on ``state``
+    would take that sensor away exactly when it has something to report.
     Subclasses fed by the events websocket set ``_ufp_requires_events_ws`` so
     they also go unavailable when that stream drops.
     """
diff --git a/homeassistant/components/unifiprotect/siren.py b/homeassistant/components/unifiprotect/siren.py
index 5b6cabfa928b..7f22fe2be410 100644
--- a/homeassistant/components/unifiprotect/siren.py
+++ b/homeassistant/components/unifiprotect/siren.py
@@ -4,7 +4,7 @@ from datetime import datetime
 import logging
 from typing import Any, override
 
-from uiprotect.data import PublicDeviceModel, Siren, SirenDuration
+from uiprotect.data import DeviceState, PublicDeviceModel, Siren, SirenDuration
 
 from homeassistant.components.siren import (
     ATTR_DURATION,
@@ -102,7 +102,11 @@ class ProtectSiren(SirenEntity):
     @callback
     def _update_from_siren(self, siren: Siren) -> None:
         """Refresh cached attributes from the siren object."""
-        self._attr_available = self.data.last_public_update_success
+        # A siren that dropped off the console stays in the bootstrap.
+        self._attr_available = (
+            self.data.last_public_update_success
+            and siren.state is DeviceState.CONNECTED
+        )
         self._attr_is_on = siren.is_active
 
     @callback
diff --git a/homeassistant/components/unifiprotect/switch.py b/homeassistant/components/unifiprotect/switch.py
index f35470a5d873..0fc189d473c9 100644
--- a/homeassistant/components/unifiprotect/switch.py
+++ b/homeassistant/components/unifiprotect/switch.py
@@ -7,6 +7,7 @@ from typing import Any, Literal, override
 
 from uiprotect.data import (
     Camera,
+    DeviceState,
     ModelType,
     ProtectAdoptableDeviceModel,
     PublicDeviceModel,
@@ -660,7 +661,11 @@ class ProtectRelayOutputSwitch(SwitchEntity):
             self._attr_available = False
             self._attr_is_on = None
             return
-        self._attr_available = self.data.last_public_update_success
+        # A relay that dropped off the console stays in the bootstrap.
+        self._attr_available = (
+            self.data.last_public_update_success
+            and relay.state is DeviceState.CONNECTED
+        )
         self._attr_is_on = (
             _RELAY_STATE_MAP.get(output.state) if output.state is not None else None
         )
diff --git a/tests/components/unifiprotect/test_relay.py b/tests/components/unifiprotect/test_relay.py
index b4107c90e607..4d6c42c1a9bf 100644
--- a/tests/components/unifiprotect/test_relay.py
+++ b/tests/components/unifiprotect/test_relay.py
@@ -6,6 +6,7 @@ from unittest.mock import AsyncMock, Mock
 
 import pytest
 from uiprotect.data import (
+    DeviceState,
     ModelType,
     PublicRelayOutput,
     Relay,
@@ -62,6 +63,7 @@ def _make_output(
 def _make_relay(
     *,
     outputs: list[Mock] | None = None,
+    state: DeviceState = DeviceState.CONNECTED,
 ) -> Mock:
     """Build a mock :class:`Relay` whose ``activate_output`` is awaitable."""
     relay = Mock(spec=Relay)
@@ -69,6 +71,7 @@ def _make_relay(
     relay.mac = RELAY_MAC
     relay.name = RELAY_NAME
     relay.model = ModelType.RELAY
+    relay.state = state
     relay.outputs = outputs if outputs is not None else [_make_output()]
 
     def get_output(output_id: int) -> Mock | None:
@@ -389,6 +392,47 @@ async def test_relay_switch_becomes_unavailable_when_relay_removed(
     assert state.state == STATE_UNAVAILABLE
 
 
+@pytest.mark.parametrize(
+    "state",
+    [DeviceState.DISCONNECTED, DeviceState.CONNECTING, DeviceState.UNKNOWN],
+)
+async def test_relay_switch_unavailable_when_not_connected_at_setup(
+    hass: HomeAssistant,
+    ufp: MockUFPFixture,
+    state: DeviceState,
+) -> None:
+    """A relay that is not connected at setup starts out unavailable."""
+    ufp.api.has_public_bootstrap = True
+    ufp.api.public_bootstrap = _make_public_bootstrap(_make_relay(state=state))
+
+    await init_entry(hass, ufp, [])
+
+    assert hass.states.get(SWITCH_ENTITY_ID).state == STATE_UNAVAILABLE
+
+
+async def test_relay_switch_unavailable_when_disconnected(
+    hass: HomeAssistant,
+    ufp_with_relay: tuple[MockUFPFixture, Mock],
+) -> None:
+    """A relay that drops off the console is unavailable, and recovers."""
+    ufp, relay = ufp_with_relay
+    relay.outputs[0].state = RelayOutputState.ON
+    await init_entry(hass, ufp, [])
+    assert hass.states.get(SWITCH_ENTITY_ID).state == STATE_ON
+
+    relay.state = DeviceState.DISCONNECTED
+    ufp.devices_ws_subscription(public_device_ws_message(relay))
+    await hass.async_block_till_done()
+
+    assert hass.states.get(SWITCH_ENTITY_ID).state == STATE_UNAVAILABLE
+
+    relay.state = DeviceState.CONNECTED
+    ufp.devices_ws_subscription(public_device_ws_message(relay))
+    await hass.async_block_till_done()
+
+    assert hass.states.get(SWITCH_ENTITY_ID).state == STATE_ON
+
+
 async def test_relay_switch_availability_follows_websocket_state(
     hass: HomeAssistant,
     ufp_with_relay: tuple[MockUFPFixture, Mock],
diff --git a/tests/components/unifiprotect/test_siren.py b/tests/components/unifiprotect/test_siren.py
index dc16ef132eef..55c8b9e5af0c 100644
--- a/tests/components/unifiprotect/test_siren.py
+++ b/tests/components/unifiprotect/test_siren.py
@@ -4,7 +4,14 @@ from datetime import timedelta
 from unittest.mock import AsyncMock, Mock
 
 import pytest
-from uiprotect.data import ModelType, PublicSirenStatus, Siren, SirenDuration, WSAction
+from uiprotect.data import (
+    DeviceState,
+    ModelType,
+    PublicSirenStatus,
+    Siren,
+    SirenDuration,
+    WSAction,
+)
 from uiprotect.exceptions import ClientError, NotAuthorized
 from uiprotect.websocket import WebsocketState
 
@@ -44,7 +51,9 @@ SIREN_NAME = "Garage Siren"
 SIREN_ENTITY_ID = "siren.garage_siren"
 
 
-def _make_siren(*, is_active: bool = False) -> Mock:
+def _make_siren(
+    *, is_active: bool = False, state: DeviceState = DeviceState.CONNECTED
+) -> Mock:
     """Build a mock :class:`Siren`."""
     status = Mock(spec=PublicSirenStatus)
     status.is_active = is_active
@@ -56,6 +65,7 @@ def _make_siren(*, is_active: bool = False) -> Mock:
     siren.mac = SIREN_MAC
     siren.name = SIREN_NAME
     siren.model = ModelType.SIREN
+    siren.state = state
     siren.volume = 50
     siren.siren_status = status
     siren.is_active = is_active
@@ -599,6 +609,46 @@ async def test_siren_auto_off_when_already_expired_at_update(
     assert state.state == STATE_OFF
 
 
+@pytest.mark.parametrize(
+    "state",
+    [DeviceState.DISCONNECTED, DeviceState.CONNECTING, DeviceState.UNKNOWN],
+)
+async def test_siren_unavailable_when_not_connected_at_setup(
+    hass: HomeAssistant,
+    ufp: MockUFPFixture,
+    state: DeviceState,
+) -> None:
+    """A siren that is not connected at setup starts out unavailable."""
+    ufp.api.has_public_bootstrap = True
+    ufp.api.public_bootstrap = _make_public_bootstrap(_make_siren(state=state))
+
+    await init_entry(hass, ufp, [])
+
+    assert hass.states.get(SIREN_ENTITY_ID).state == STATE_UNAVAILABLE
+
+
+async def test_siren_unavailable_when_disconnected(
+    hass: HomeAssistant,
+    ufp_with_siren: MockUFPFixture,
+    siren: Mock,
+) -> None:
+    """A siren that drops off the console is unavailable, and recovers."""
+    await init_entry(hass, ufp_with_siren, [])
+    assert hass.states.get(SIREN_ENTITY_ID).state == STATE_OFF
+
+    siren.state = DeviceState.DISCONNECTED
+    ufp_with_siren.devices_ws_subscription(_make_ws_msg(siren))
+    await hass.async_block_till_done()
+
+    assert hass.states.get(SIREN_ENTITY_ID).state == STATE_UNAVAILABLE
+
+    siren.state = DeviceState.CONNECTED
+    ufp_with_siren.devices_ws_subscription(_make_ws_msg(siren))
+    await hass.async_block_till_done()
+
+    assert hass.states.get(SIREN_ENTITY_ID).state == STATE_OFF
+
+
 async def test_siren_unavailable_on_delete_event(
     hass: HomeAssistant,
     ufp_with_siren: MockUFPFixture,