diff --git a/homeassistant/components/watts/__init__.py b/homeassistant/components/watts/__init__.py
index 92cc21e862d687..3dbb42371de5d6 100644
--- a/homeassistant/components/watts/__init__.py
+++ b/homeassistant/components/watts/__init__.py
@@ -12,8 +12,13 @@
 from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import ConfigEntryAuthFailed, ConfigEntryNotReady
-from homeassistant.helpers import aiohttp_client, config_entry_oauth2_flow
+from homeassistant.helpers import (
+    aiohttp_client,
+    config_entry_oauth2_flow,
+    config_validation as cv,
+)
 from homeassistant.helpers.dispatcher import async_dispatcher_send
+from homeassistant.helpers.typing import ConfigType
 
 from .const import DOMAIN, SUPPORTED_DEVICE_TYPES
 from .coordinator import (
@@ -21,11 +26,20 @@
     WattsVisionDeviceData,
     WattsVisionHubCoordinator,
 )
+from .services import async_setup_services
 
 _LOGGER = logging.getLogger(__name__)
 
 PLATFORMS: list[Platform] = [Platform.CLIMATE, Platform.SWITCH]
 
+CONFIG_SCHEMA = cv.config_entry_only_config_schema(DOMAIN)
+
+
+async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
+    """Set up the Watts Vision component."""
+    async_setup_services(hass)
+    return True
+
 
 @dataclass
 class WattsVisionRuntimeData:
diff --git a/homeassistant/components/watts/climate.py b/homeassistant/components/watts/climate.py
index 1094e66589940a..e56d4c4bebe9c1 100644
--- a/homeassistant/components/watts/climate.py
+++ b/homeassistant/components/watts/climate.py
@@ -1,8 +1,10 @@
 """Climate platform for Watts Vision integration."""
 
+from datetime import timedelta
 import logging
 from typing import Any
 
+from visionpluspython.exceptions import WattsVisionError
 from visionpluspython.models import ThermostatDevice, ThermostatMode
 
 from homeassistant.components.climate import (
@@ -13,7 +15,7 @@
 )
 from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
 from homeassistant.core import HomeAssistant, callback
-from homeassistant.exceptions import HomeAssistantError
+from homeassistant.exceptions import HomeAssistantError, ServiceValidationError
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 
@@ -194,6 +196,47 @@ async def async_set_temperature(self, **kwargs: Any) -> None:
 
         await self.coordinator.async_refresh()
 
+    async def async_activate_timer_mode(
+        self, temperature: float, duration: timedelta
+    ) -> None:
+        """Activate timer mode with a target temperature and duration."""
+        if not self._attr_min_temp <= temperature <= self._attr_max_temp:
+            raise ServiceValidationError(
+                translation_domain=DOMAIN,
+                translation_key="timer_temperature_out_of_range",
+                translation_placeholders={
+                    "temperature": str(temperature),
+                    "min_temp": str(self._attr_min_temp),
+                    "max_temp": str(self._attr_max_temp),
+                },
+            )
+
+        duration_minutes, remainder = divmod(duration, timedelta(minutes=1))
+        if remainder:
+            duration_minutes += 1
+
+        try:
+            await self.coordinator.client.activate_thermostat_timer(
+                self.device_id, temperature, duration_minutes
+            )
+        except (WattsVisionError, ValueError, RuntimeError) as err:
+            raise HomeAssistantError(
+                translation_domain=DOMAIN,
+                translation_key="activate_timer_mode_error",
+            ) from err
+
+        _LOGGER.debug(
+            "Successfully activated timer mode: %s%s for %d min on %s",
+            temperature,
+            self.temperature_unit,
+            duration_minutes,
+            self.device_id,
+        )
+
+        self.coordinator.trigger_fast_polling()
+
+        await self.coordinator.async_refresh()
+
     async def async_set_hvac_mode(self, hvac_mode: HVACMode) -> None:
         """Set new target hvac mode."""
         mode = HVAC_MODE_TO_THERMOSTAT[hvac_mode]
diff --git a/homeassistant/components/watts/const.py b/homeassistant/components/watts/const.py
index 597b910ae40c3f..e1ba4a0134e09b 100644
--- a/homeassistant/components/watts/const.py
+++ b/homeassistant/components/watts/const.py
@@ -67,3 +67,7 @@
 }
 
 SUPPORTED_DEVICE_TYPES = (ThermostatDevice, SwitchDevice)
+
+# Timer service
+SERVICE_ACTIVATE_TIMER_MODE = "activate_timer_mode"
+ATTR_DURATION = "duration"
diff --git a/homeassistant/components/watts/icons.json b/homeassistant/components/watts/icons.json
index 191ab307bf8222..58eb4bd0445cc2 100644
--- a/homeassistant/components/watts/icons.json
+++ b/homeassistant/components/watts/icons.json
@@ -14,5 +14,10 @@
         }
       }
     }
+  },
+  "services": {
+    "activate_timer_mode": {
+      "service": "mdi:timer"
+    }
   }
 }
diff --git a/homeassistant/components/watts/services.py b/homeassistant/components/watts/services.py
new file mode 100644
index 00000000000000..e7659c6e47a665
--- /dev/null
+++ b/homeassistant/components/watts/services.py
@@ -0,0 +1,31 @@
+"""Services for Watts Vision integration."""
+
+from datetime import timedelta
+
+import voluptuous as vol
+
+from homeassistant.components.climate import DOMAIN as CLIMATE_DOMAIN
+from homeassistant.const import ATTR_TEMPERATURE
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers import config_validation as cv, service
+
+from .const import ATTR_DURATION, DOMAIN, SERVICE_ACTIVATE_TIMER_MODE
+
+
+@callback
+def async_setup_services(hass: HomeAssistant) -> None:
+    """Set up services for the Watts Vision integration."""
+    service.async_register_platform_entity_service(
+        hass,
+        DOMAIN,
+        SERVICE_ACTIVATE_TIMER_MODE,
+        entity_domain=CLIMATE_DOMAIN,
+        schema={
+            vol.Required(ATTR_TEMPERATURE): vol.Coerce(float),
+            vol.Required(ATTR_DURATION): vol.All(
+                cv.time_period,
+                vol.Range(min=timedelta(minutes=1), max=timedelta(days=1)),
+            ),
+        },
+        func="async_activate_timer_mode",
+    )
diff --git a/homeassistant/components/watts/services.yaml b/homeassistant/components/watts/services.yaml
new file mode 100644
index 00000000000000..f252528a94f34a
--- /dev/null
+++ b/homeassistant/components/watts/services.yaml
@@ -0,0 +1,18 @@
+activate_timer_mode:
+  target:
+    entity:
+      domain: climate
+      integration: watts
+  fields:
+    temperature:
+      required: true
+      selector:
+        number:
+          step: 0.5
+          unit_of_measurement: "°"
+          mode: box
+    duration:
+      required: true
+      selector:
+        duration:
+          enable_second: false
diff --git a/homeassistant/components/watts/strings.json b/homeassistant/components/watts/strings.json
index 01734bb221442b..5ae5f6eb988424 100644
--- a/homeassistant/components/watts/strings.json
+++ b/homeassistant/components/watts/strings.json
@@ -45,6 +45,9 @@
     }
   },
   "exceptions": {
+    "activate_timer_mode_error": {
+      "message": "An error occurred while activating timer mode"
+    },
     "authentication_failed": {
       "message": "Authentication failed"
     },
@@ -83,6 +86,25 @@
     },
     "temporary_connection_error": {
       "message": "Temporary connection error"
+    },
+    "timer_temperature_out_of_range": {
+      "message": "Timer temperature {temperature} is out of range ({min_temp}-{max_temp})"
+    }
+  },
+  "services": {
+    "activate_timer_mode": {
+      "description": "Activates timer mode on the thermostat for a specified temperature and duration.",
+      "fields": {
+        "duration": {
+          "description": "Duration of the timer.",
+          "name": "Duration"
+        },
+        "temperature": {
+          "description": "Target temperature while the timer is active.",
+          "name": "Temperature"
+        }
+      },
+      "name": "Activate timer mode"
     }
   }
 }
diff --git a/tests/components/watts/test_climate.py b/tests/components/watts/test_climate.py
index 29933f315afbef..a8194e9a4d4976 100644
--- a/tests/components/watts/test_climate.py
+++ b/tests/components/watts/test_climate.py
@@ -18,9 +18,14 @@
     SERVICE_SET_TEMPERATURE,
     HVACMode,
 )
+from homeassistant.components.watts.const import (
+    ATTR_DURATION,
+    DOMAIN,
+    SERVICE_ACTIVATE_TIMER_MODE,
+)
 from homeassistant.const import ATTR_ENTITY_ID, Platform
 from homeassistant.core import HomeAssistant
-from homeassistant.exceptions import HomeAssistantError
+from homeassistant.exceptions import HomeAssistantError, ServiceValidationError
 from homeassistant.helpers import entity_registry as er
 
 from . import setup_integration
@@ -283,6 +288,89 @@ async def test_set_preset_mode_error(
         )
 
 
+@pytest.mark.parametrize(
+    ("duration", "expected_minutes"),
+    [
+        (timedelta(minutes=90), 90),
+        (timedelta(minutes=1, seconds=30), 2),
+    ],
+)
+async def test_activate_timer_mode(
+    hass: HomeAssistant,
+    mock_watts_client: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+    duration: timedelta,
+    expected_minutes: int,
+) -> None:
+    """Test activating timer mode with temperature and duration."""
+    await setup_integration(hass, mock_config_entry)
+
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_ACTIVATE_TIMER_MODE,
+        {
+            ATTR_ENTITY_ID: "climate.living_room_thermostat",
+            ATTR_TEMPERATURE: 20.5,
+            ATTR_DURATION: duration,
+        },
+        blocking=True,
+    )
+
+    mock_watts_client.activate_thermostat_timer.assert_called_once_with(
+        "thermostat_123", 20.5, expected_minutes
+    )
+
+
+@pytest.mark.parametrize("temperature", [4.5, 30.5])
+async def test_activate_timer_mode_temperature_out_of_range(
+    hass: HomeAssistant,
+    mock_watts_client: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+    temperature: float,
+) -> None:
+    """Test that out-of-range timer temperatures are rejected."""
+    await setup_integration(hass, mock_config_entry)
+
+    with pytest.raises(ServiceValidationError, match="out of range"):
+        await hass.services.async_call(
+            DOMAIN,
+            SERVICE_ACTIVATE_TIMER_MODE,
+            {
+                ATTR_ENTITY_ID: "climate.living_room_thermostat",
+                ATTR_TEMPERATURE: temperature,
+                ATTR_DURATION: timedelta(minutes=90),
+            },
+            blocking=True,
+        )
+
+    mock_watts_client.activate_thermostat_timer.assert_not_called()
+
+
+async def test_activate_timer_mode_error(
+    hass: HomeAssistant,
+    mock_watts_client: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test error handling when activating timer mode fails."""
+    await setup_integration(hass, mock_config_entry)
+
+    mock_watts_client.activate_thermostat_timer.side_effect = RuntimeError("API Error")
+
+    with pytest.raises(
+        HomeAssistantError, match="An error occurred while activating timer mode"
+    ):
+        await hass.services.async_call(
+            DOMAIN,
+            SERVICE_ACTIVATE_TIMER_MODE,
+            {
+                ATTR_ENTITY_ID: "climate.living_room_thermostat",
+                ATTR_TEMPERATURE: 20.5,
+                ATTR_DURATION: timedelta(minutes=90),
+            },
+            blocking=True,
+        )
+
+
 async def test_set_temperature_api_error(
     hass: HomeAssistant,
     mock_watts_client: AsyncMock,