diff --git a/.strict-typing b/.strict-typing
index 1832a83641a..ebfed5dfa5b 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -153,6 +153,7 @@ homeassistant.components.luftdaten.*
 homeassistant.components.mailbox.*
 homeassistant.components.media_player.*
 homeassistant.components.media_source.*
+homeassistant.components.metoffice.*
 homeassistant.components.mjpeg.*
 homeassistant.components.modbus.*
 homeassistant.components.modem_callerid.*
diff --git a/CODEOWNERS b/CODEOWNERS
index 6ae1c9605db..9f53aeab34e 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -630,8 +630,8 @@ build.json @home-assistant/supervisor
 /homeassistant/components/meteoalarm/ @rolfberkenbosch
 /homeassistant/components/meteoclimatic/ @adrianmo
 /tests/components/meteoclimatic/ @adrianmo
-/homeassistant/components/metoffice/ @MrHarcombe
-/tests/components/metoffice/ @MrHarcombe
+/homeassistant/components/metoffice/ @MrHarcombe @avee87
+/tests/components/metoffice/ @MrHarcombe @avee87
 /homeassistant/components/miflora/ @danielhiversen @basnijholt
 /homeassistant/components/mikrotik/ @engrbm87
 /tests/components/mikrotik/ @engrbm87
diff --git a/homeassistant/components/metoffice/config_flow.py b/homeassistant/components/metoffice/config_flow.py
index 959680a90ec..3cf3b0fcda0 100644
--- a/homeassistant/components/metoffice/config_flow.py
+++ b/homeassistant/components/metoffice/config_flow.py
@@ -1,11 +1,15 @@
 """Config flow for Met Office integration."""
+from __future__ import annotations
+
 import logging
+from typing import Any
 
 import datapoint
 import voluptuous as vol
 
 from homeassistant import config_entries, core, exceptions
 from homeassistant.const import CONF_API_KEY, CONF_LATITUDE, CONF_LONGITUDE, CONF_NAME
+from homeassistant.data_entry_flow import FlowResult
 from homeassistant.helpers import config_validation as cv
 
 from .const import DOMAIN
@@ -14,7 +18,9 @@ from .helpers import fetch_site
 _LOGGER = logging.getLogger(__name__)
 
 
-async def validate_input(hass: core.HomeAssistant, data):
+async def validate_input(
+    hass: core.HomeAssistant, data: dict[str, Any]
+) -> dict[str, str]:
     """Validate that the user input allows us to connect to DataPoint.
 
     Data has the keys from DATA_SCHEMA with values provided by the user.
@@ -40,7 +46,9 @@ class MetOfficeConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    async def async_step_user(self, user_input=None):
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> FlowResult:
         """Handle the initial step."""
         errors = {}
         if user_input is not None:
diff --git a/homeassistant/components/metoffice/const.py b/homeassistant/components/metoffice/const.py
index e413b102898..12f88cc6d56 100644
--- a/homeassistant/components/metoffice/const.py
+++ b/homeassistant/components/metoffice/const.py
@@ -37,7 +37,7 @@ MODE_3HOURLY_LABEL = "3-Hourly"
 MODE_DAILY = "daily"
 MODE_DAILY_LABEL = "Daily"
 
-CONDITION_CLASSES = {
+CONDITION_CLASSES: dict[str, list[str]] = {
     ATTR_CONDITION_CLEAR_NIGHT: ["0"],
     ATTR_CONDITION_CLOUDY: ["7", "8"],
     ATTR_CONDITION_FOG: ["5", "6"],
diff --git a/homeassistant/components/metoffice/data.py b/homeassistant/components/metoffice/data.py
index 607c09e90b6..4b2741ce0fb 100644
--- a/homeassistant/components/metoffice/data.py
+++ b/homeassistant/components/metoffice/data.py
@@ -1,11 +1,17 @@
 """Common Met Office Data class used by both sensor and entity."""
 
 
+from dataclasses import dataclass
+
+from datapoint.Forecast import Forecast
+from datapoint.Site import Site
+from datapoint.Timestep import Timestep
+
+
+@dataclass
 class MetOfficeData:
     """Data structure for MetOffice weather and forecast."""
 
-    def __init__(self, now, forecast, site):
-        """Initialize the data object."""
-        self.now = now
-        self.forecast = forecast
-        self.site = site
+    now: Forecast
+    forecast: list[Timestep]
+    site: Site
diff --git a/homeassistant/components/metoffice/helpers.py b/homeassistant/components/metoffice/helpers.py
index 00d5e73501d..ecef7e5ddcb 100644
--- a/homeassistant/components/metoffice/helpers.py
+++ b/homeassistant/components/metoffice/helpers.py
@@ -1,8 +1,10 @@
 """Helpers used for Met Office integration."""
+from __future__ import annotations
 
 import logging
 
 import datapoint
+from datapoint.Site import Site
 
 from homeassistant.helpers.update_coordinator import UpdateFailed
 from homeassistant.util.dt import utcnow
@@ -13,7 +15,9 @@ from .data import MetOfficeData
 _LOGGER = logging.getLogger(__name__)
 
 
-def fetch_site(connection: datapoint.Manager, latitude, longitude):
+def fetch_site(
+    connection: datapoint.Manager, latitude: float, longitude: float
+) -> Site | None:
     """Fetch site information from Datapoint API."""
     try:
         return connection.get_nearest_forecast_site(
@@ -24,7 +28,7 @@ def fetch_site(connection: datapoint.Manager, latitude, longitude):
         return None
 
 
-def fetch_data(connection: datapoint.Manager, site, mode) -> MetOfficeData:
+def fetch_data(connection: datapoint.Manager, site: Site, mode: str) -> MetOfficeData:
     """Fetch weather and forecast from Datapoint API."""
     try:
         forecast = connection.get_forecast_for_site(site.id, mode)
@@ -34,8 +38,8 @@ def fetch_data(connection: datapoint.Manager, site, mode) -> MetOfficeData:
     else:
         time_now = utcnow()
         return MetOfficeData(
-            forecast.now(),
-            [
+            now=forecast.now(),
+            forecast=[
                 timestep
                 for day in forecast.days
                 for timestep in day.timesteps
@@ -44,5 +48,5 @@ def fetch_data(connection: datapoint.Manager, site, mode) -> MetOfficeData:
                     mode == MODE_3HOURLY or timestep.date.hour > 6
                 )  # ensures only one result per day in MODE_DAILY
             ],
-            site,
+            site=site,
         )
diff --git a/homeassistant/components/metoffice/manifest.json b/homeassistant/components/metoffice/manifest.json
index d38d2d8cffe..887ecb3578d 100644
--- a/homeassistant/components/metoffice/manifest.json
+++ b/homeassistant/components/metoffice/manifest.json
@@ -3,7 +3,7 @@
   "name": "Met Office",
   "documentation": "https://www.home-assistant.io/integrations/metoffice",
   "requirements": ["datapoint==0.9.8"],
-  "codeowners": ["@MrHarcombe"],
+  "codeowners": ["@MrHarcombe", "@avee87"],
   "config_flow": true,
   "iot_class": "cloud_polling",
   "loggers": ["datapoint"]
diff --git a/homeassistant/components/metoffice/sensor.py b/homeassistant/components/metoffice/sensor.py
index 699b137c55f..e24e2299be4 100644
--- a/homeassistant/components/metoffice/sensor.py
+++ b/homeassistant/components/metoffice/sensor.py
@@ -1,6 +1,10 @@
 """Support for UK Met Office weather service."""
 from __future__ import annotations
 
+from typing import Any
+
+from datapoint.Element import Element
+
 from homeassistant.components.sensor import (
     SensorDeviceClass,
     SensorEntity,
@@ -17,7 +21,10 @@ from homeassistant.const import (
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.update_coordinator import CoordinatorEntity
+from homeassistant.helpers.update_coordinator import (
+    CoordinatorEntity,
+    DataUpdateCoordinator,
+)
 
 from . import get_device_info
 from .const import (
@@ -34,6 +41,7 @@ from .const import (
     VISIBILITY_CLASSES,
     VISIBILITY_DISTANCE_CLASSES,
 )
+from .data import MetOfficeData
 
 ATTR_LAST_UPDATE = "last_update"
 ATTR_SENSOR_ID = "sensor_id"
@@ -170,21 +178,24 @@ async def async_setup_entry(
     )
 
 
-class MetOfficeCurrentSensor(CoordinatorEntity, SensorEntity):
+class MetOfficeCurrentSensor(
+    CoordinatorEntity[DataUpdateCoordinator[MetOfficeData]], SensorEntity
+):
     """Implementation of a Met Office current weather condition sensor."""
 
     def __init__(
         self,
-        coordinator,
-        hass_data,
-        use_3hourly,
+        coordinator: DataUpdateCoordinator[MetOfficeData],
+        hass_data: dict[str, Any],
+        use_3hourly: bool,
         description: SensorEntityDescription,
-    ):
+    ) -> None:
         """Initialize the sensor."""
         super().__init__(coordinator)
 
         self.entity_description = description
         mode_label = MODE_3HOURLY_LABEL if use_3hourly else MODE_DAILY_LABEL
+
         self._attr_device_info = get_device_info(
             coordinates=hass_data[METOFFICE_COORDINATES], name=hass_data[METOFFICE_NAME]
         )
@@ -192,11 +203,12 @@ class MetOfficeCurrentSensor(CoordinatorEntity, SensorEntity):
         self._attr_unique_id = f"{description.name}_{hass_data[METOFFICE_COORDINATES]}"
         if not use_3hourly:
             self._attr_unique_id = f"{self._attr_unique_id}_{MODE_DAILY}"
-
-        self.use_3hourly = use_3hourly
+        self._attr_entity_registry_enabled_default = (
+            self.entity_description.entity_registry_enabled_default and use_3hourly
+        )
 
     @property
-    def native_value(self):
+    def native_value(self) -> Any | None:
         """Return the state of the sensor."""
         value = None
 
@@ -224,13 +236,13 @@ class MetOfficeCurrentSensor(CoordinatorEntity, SensorEntity):
         elif hasattr(self.coordinator.data.now, self.entity_description.key):
             value = getattr(self.coordinator.data.now, self.entity_description.key)
 
-            if hasattr(value, "value"):
+            if isinstance(value, Element):
                 value = value.value
 
         return value
 
     @property
-    def icon(self):
+    def icon(self) -> str | None:
         """Return the icon for the entity card."""
         value = self.entity_description.icon
         if self.entity_description.key == "weather":
@@ -244,7 +256,7 @@ class MetOfficeCurrentSensor(CoordinatorEntity, SensorEntity):
         return value
 
     @property
-    def extra_state_attributes(self):
+    def extra_state_attributes(self) -> dict[str, Any]:
         """Return the state attributes of the device."""
         return {
             ATTR_ATTRIBUTION: ATTRIBUTION,
@@ -253,10 +265,3 @@ class MetOfficeCurrentSensor(CoordinatorEntity, SensorEntity):
             ATTR_SITE_ID: self.coordinator.data.site.id,
             ATTR_SITE_NAME: self.coordinator.data.site.name,
         }
-
-    @property
-    def entity_registry_enabled_default(self) -> bool:
-        """Return if the entity should be enabled when first added to the entity registry."""
-        return (
-            self.entity_description.entity_registry_enabled_default and self.use_3hourly
-        )
diff --git a/homeassistant/components/metoffice/weather.py b/homeassistant/components/metoffice/weather.py
index f4e0bf61d30..184782d4c12 100644
--- a/homeassistant/components/metoffice/weather.py
+++ b/homeassistant/components/metoffice/weather.py
@@ -1,18 +1,27 @@
 """Support for UK Met Office weather service."""
+from __future__ import annotations
+
+from typing import Any
+
+from datapoint.Timestep import Timestep
+
 from homeassistant.components.weather import (
     ATTR_FORECAST_CONDITION,
     ATTR_FORECAST_NATIVE_TEMP,
     ATTR_FORECAST_NATIVE_WIND_SPEED,
     ATTR_FORECAST_PRECIPITATION_PROBABILITY,
-    ATTR_FORECAST_TIME,
     ATTR_FORECAST_WIND_BEARING,
+    Forecast,
     WeatherEntity,
 )
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import PRESSURE_HPA, SPEED_MILES_PER_HOUR, TEMP_CELSIUS
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.update_coordinator import CoordinatorEntity
+from homeassistant.helpers.update_coordinator import (
+    CoordinatorEntity,
+    DataUpdateCoordinator,
+)
 
 from . import get_device_info
 from .const import (
@@ -28,6 +37,7 @@ from .const import (
     MODE_DAILY,
     MODE_DAILY_LABEL,
 )
+from .data import MetOfficeData
 
 
 async def async_setup_entry(
@@ -45,9 +55,8 @@ async def async_setup_entry(
     )
 
 
-def _build_forecast_data(timestep):
-    data = {}
-    data[ATTR_FORECAST_TIME] = timestep.date.isoformat()
+def _build_forecast_data(timestep: Timestep) -> Forecast:
+    data = Forecast(datetime=timestep.date.isoformat())
     if timestep.weather:
         data[ATTR_FORECAST_CONDITION] = _get_weather_condition(timestep.weather.value)
     if timestep.precipitation:
@@ -61,21 +70,30 @@ def _build_forecast_data(timestep):
     return data
 
 
-def _get_weather_condition(metoffice_code):
+def _get_weather_condition(metoffice_code: str) -> str | None:
     for hass_name, metoffice_codes in CONDITION_CLASSES.items():
         if metoffice_code in metoffice_codes:
             return hass_name
     return None
 
 
-class MetOfficeWeather(CoordinatorEntity, WeatherEntity):
+class MetOfficeWeather(
+    CoordinatorEntity[DataUpdateCoordinator[MetOfficeData]], WeatherEntity
+):
     """Implementation of a Met Office weather condition."""
 
+    _attr_attribution = ATTRIBUTION
+
     _attr_native_temperature_unit = TEMP_CELSIUS
     _attr_native_pressure_unit = PRESSURE_HPA
     _attr_native_wind_speed_unit = SPEED_MILES_PER_HOUR
 
-    def __init__(self, coordinator, hass_data, use_3hourly):
+    def __init__(
+        self,
+        coordinator: DataUpdateCoordinator[MetOfficeData],
+        hass_data: dict[str, Any],
+        use_3hourly: bool,
+    ) -> None:
         """Initialise the platform with a data instance."""
         super().__init__(coordinator)
 
@@ -89,62 +107,61 @@ class MetOfficeWeather(CoordinatorEntity, WeatherEntity):
             self._attr_unique_id = f"{self._attr_unique_id}_{MODE_DAILY}"
 
     @property
-    def condition(self):
+    def condition(self) -> str | None:
         """Return the current condition."""
         if self.coordinator.data.now:
             return _get_weather_condition(self.coordinator.data.now.weather.value)
         return None
 
     @property
-    def native_temperature(self):
+    def native_temperature(self) -> float | None:
         """Return the platform temperature."""
-        if self.coordinator.data.now.temperature:
-            return self.coordinator.data.now.temperature.value
+        weather_now = self.coordinator.data.now
+        if weather_now.temperature:
+            value = weather_now.temperature.value
+            return float(value) if value is not None else None
         return None
 
     @property
-    def native_pressure(self):
+    def native_pressure(self) -> float | None:
         """Return the mean sea-level pressure."""
         weather_now = self.coordinator.data.now
         if weather_now and weather_now.pressure:
-            return weather_now.pressure.value
+            value = weather_now.pressure.value
+            return float(value) if value is not None else None
         return None
 
     @property
-    def humidity(self):
+    def humidity(self) -> float | None:
         """Return the relative humidity."""
         weather_now = self.coordinator.data.now
         if weather_now and weather_now.humidity:
-            return weather_now.humidity.value
+            value = weather_now.humidity.value
+            return float(value) if value is not None else None
         return None
 
     @property
-    def native_wind_speed(self):
+    def native_wind_speed(self) -> float | None:
         """Return the wind speed."""
         weather_now = self.coordinator.data.now
         if weather_now and weather_now.wind_speed:
-            return weather_now.wind_speed.value
+            value = weather_now.wind_speed.value
+            return float(value) if value is not None else None
         return None
 
     @property
-    def wind_bearing(self):
+    def wind_bearing(self) -> str | None:
         """Return the wind bearing."""
         weather_now = self.coordinator.data.now
         if weather_now and weather_now.wind_direction:
-            return weather_now.wind_direction.value
+            value = weather_now.wind_direction.value
+            return str(value) if value is not None else None
         return None
 
     @property
-    def forecast(self):
+    def forecast(self) -> list[Forecast] | None:
         """Return the forecast array."""
-        if self.coordinator.data.forecast is None:
-            return None
         return [
             _build_forecast_data(timestep)
             for timestep in self.coordinator.data.forecast
         ]
-
-    @property
-    def attribution(self):
-        """Return the attribution."""
-        return ATTRIBUTION
diff --git a/mypy.ini b/mypy.ini
index 22a6fd801c3..77830664696 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1446,6 +1446,17 @@ no_implicit_optional = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.metoffice.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+no_implicit_optional = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.mjpeg.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true