diff --git a/homeassistant/components/lamarzocco/__init__.py b/homeassistant/components/lamarzocco/__init__.py
index b871f2eb23a..51a939391a8 100644
--- a/homeassistant/components/lamarzocco/__init__.py
+++ b/homeassistant/components/lamarzocco/__init__.py
@@ -40,6 +40,7 @@ PLATFORMS = [
     Platform.CALENDAR,
     Platform.NUMBER,
     Platform.SELECT,
+    Platform.SENSOR,
     Platform.SWITCH,
     Platform.UPDATE,
 ]
diff --git a/homeassistant/components/lamarzocco/icons.json b/homeassistant/components/lamarzocco/icons.json
index 7f22be34d3c..2964f48ecbd 100644
--- a/homeassistant/components/lamarzocco/icons.json
+++ b/homeassistant/components/lamarzocco/icons.json
@@ -72,6 +72,14 @@
         }
       }
     },
+    "sensor": {
+      "coffee_boiler_ready_time": {
+        "default": "mdi:av-timer"
+      },
+      "steam_boiler_ready_time": {
+        "default": "mdi:av-timer"
+      }
+    },
     "switch": {
       "main": {
         "default": "mdi:power",
diff --git a/homeassistant/components/lamarzocco/sensor.py b/homeassistant/components/lamarzocco/sensor.py
new file mode 100644
index 00000000000..17f11534483
--- /dev/null
+++ b/homeassistant/components/lamarzocco/sensor.py
@@ -0,0 +1,115 @@
+"""Sensor platform for La Marzocco espresso machines."""
+
+from collections.abc import Callable
+from dataclasses import dataclass
+from datetime import datetime
+from typing import cast
+
+from pylamarzocco.const import ModelName, WidgetType
+from pylamarzocco.models import (
+    BaseWidgetOutput,
+    CoffeeBoiler,
+    SteamBoilerLevel,
+    SteamBoilerTemperature,
+)
+
+from homeassistant.components.sensor import (
+    SensorDeviceClass,
+    SensorEntity,
+    SensorEntityDescription,
+)
+from homeassistant.const import EntityCategory
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+from homeassistant.helpers.typing import StateType
+
+from .coordinator import LaMarzoccoConfigEntry
+from .entity import LaMarzoccoEntity, LaMarzoccoEntityDescription
+
+# Coordinator is used to centralize the data updates
+PARALLEL_UPDATES = 0
+
+
+@dataclass(frozen=True, kw_only=True)
+class LaMarzoccoSensorEntityDescription(
+    LaMarzoccoEntityDescription,
+    SensorEntityDescription,
+):
+    """Description of a La Marzocco sensor."""
+
+    value_fn: Callable[
+        [dict[WidgetType, BaseWidgetOutput]], StateType | datetime | None
+    ]
+
+
+ENTITIES: tuple[LaMarzoccoSensorEntityDescription, ...] = (
+    LaMarzoccoSensorEntityDescription(
+        key="coffee_boiler_ready_time",
+        translation_key="coffee_boiler_ready_time",
+        device_class=SensorDeviceClass.TIMESTAMP,
+        value_fn=(
+            lambda config: cast(
+                CoffeeBoiler, config[WidgetType.CM_COFFEE_BOILER]
+            ).ready_start_time
+        ),
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
+    LaMarzoccoSensorEntityDescription(
+        key="steam_boiler_ready_time",
+        translation_key="steam_boiler_ready_time",
+        device_class=SensorDeviceClass.TIMESTAMP,
+        value_fn=(
+            lambda config: cast(
+                SteamBoilerLevel, config[WidgetType.CM_STEAM_BOILER_LEVEL]
+            ).ready_start_time
+        ),
+        entity_category=EntityCategory.DIAGNOSTIC,
+        supported_fn=(
+            lambda coordinator: coordinator.device.dashboard.model_name
+            in (ModelName.LINEA_MICRA, ModelName.LINEA_MINI_R)
+        ),
+    ),
+    LaMarzoccoSensorEntityDescription(
+        key="steam_boiler_ready_time",
+        translation_key="steam_boiler_ready_time",
+        device_class=SensorDeviceClass.TIMESTAMP,
+        value_fn=(
+            lambda config: cast(
+                SteamBoilerTemperature, config[WidgetType.CM_STEAM_BOILER_TEMPERATURE]
+            ).ready_start_time
+        ),
+        entity_category=EntityCategory.DIAGNOSTIC,
+        supported_fn=(
+            lambda coordinator: coordinator.device.dashboard.model_name
+            in (ModelName.GS3_AV, ModelName.GS3_MP, ModelName.LINEA_MINI)
+        ),
+    ),
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: LaMarzoccoConfigEntry,
+    async_add_entities: AddConfigEntryEntitiesCallback,
+) -> None:
+    """Set up sensor entities."""
+    coordinator = entry.runtime_data.config_coordinator
+
+    async_add_entities(
+        LaMarzoccoSensorEntity(coordinator, description)
+        for description in ENTITIES
+        if description.supported_fn(coordinator)
+    )
+
+
+class LaMarzoccoSensorEntity(LaMarzoccoEntity, SensorEntity):
+    """Sensor representing espresso machine water reservoir status."""
+
+    entity_description: LaMarzoccoSensorEntityDescription
+
+    @property
+    def native_value(self) -> StateType | datetime | None:
+        """Return  value of the sensor."""
+        return self.entity_description.value_fn(
+            self.coordinator.device.dashboard.config
+        )
diff --git a/homeassistant/components/lamarzocco/strings.json b/homeassistant/components/lamarzocco/strings.json
index 43f3a14db6f..7a77b8ad72c 100644
--- a/homeassistant/components/lamarzocco/strings.json
+++ b/homeassistant/components/lamarzocco/strings.json
@@ -140,6 +140,14 @@
         }
       }
     },
+    "sensor": {
+      "coffee_boiler_ready_time": {
+        "name": "Coffee boiler ready time"
+      },
+      "steam_boiler_ready_time": {
+        "name": "Steam boiler ready time"
+      }
+    },
     "switch": {
       "auto_on_off": {
         "name": "Auto on/off ({id})"
diff --git a/tests/components/lamarzocco/snapshots/test_sensor.ambr b/tests/components/lamarzocco/snapshots/test_sensor.ambr
new file mode 100644
index 00000000000..311e7416b1c
--- /dev/null
+++ b/tests/components/lamarzocco/snapshots/test_sensor.ambr
@@ -0,0 +1,97 @@
+# serializer version: 1
+# name: test_sensors[sensor.gs012345_coffee_boiler_ready_time-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
+    'entity_id': 'sensor.gs012345_coffee_boiler_ready_time',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'options': dict({
+    }),
+    'original_device_class': <SensorDeviceClass.TIMESTAMP: 'timestamp'>,
+    'original_icon': None,
+    'original_name': 'Coffee boiler ready time',
+    'platform': 'lamarzocco',
+    'previous_unique_id': None,
+    'supported_features': 0,
+    'translation_key': 'coffee_boiler_ready_time',
+    'unique_id': 'GS012345_coffee_boiler_ready_time',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_sensors[sensor.gs012345_coffee_boiler_ready_time-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'timestamp',
+      'friendly_name': 'GS012345 Coffee boiler ready time',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.gs012345_coffee_boiler_ready_time',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'unknown',
+  })
+# ---
+# name: test_sensors[sensor.gs012345_steam_boiler_ready_time-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
+    'entity_id': 'sensor.gs012345_steam_boiler_ready_time',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'options': dict({
+    }),
+    'original_device_class': <SensorDeviceClass.TIMESTAMP: 'timestamp'>,
+    'original_icon': None,
+    'original_name': 'Steam boiler ready time',
+    'platform': 'lamarzocco',
+    'previous_unique_id': None,
+    'supported_features': 0,
+    'translation_key': 'steam_boiler_ready_time',
+    'unique_id': 'GS012345_steam_boiler_ready_time',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_sensors[sensor.gs012345_steam_boiler_ready_time-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'timestamp',
+      'friendly_name': 'GS012345 Steam boiler ready time',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.gs012345_steam_boiler_ready_time',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'unknown',
+  })
+# ---
diff --git a/tests/components/lamarzocco/test_sensor.py b/tests/components/lamarzocco/test_sensor.py
new file mode 100644
index 00000000000..0b050dd7788
--- /dev/null
+++ b/tests/components/lamarzocco/test_sensor.py
@@ -0,0 +1,52 @@
+"""Tests for La Marzocco sensors."""
+
+from unittest.mock import MagicMock, patch
+
+from pylamarzocco.const import ModelName
+import pytest
+from syrupy import SnapshotAssertion
+
+from homeassistant.const import Platform
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry as er
+
+from . import async_init_integration
+
+from tests.common import MockConfigEntry, snapshot_platform
+
+
+async def test_sensors(
+    hass: HomeAssistant,
+    mock_lamarzocco: MagicMock,
+    mock_config_entry: MockConfigEntry,
+    entity_registry: er.EntityRegistry,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test the La Marzocco sensors."""
+
+    with patch("homeassistant.components.lamarzocco.PLATFORMS", [Platform.SENSOR]):
+        await async_init_integration(hass, mock_config_entry)
+    await snapshot_platform(hass, entity_registry, snapshot, mock_config_entry.entry_id)
+
+
+@pytest.mark.parametrize(
+    "device_fixture",
+    [ModelName.GS3_AV, ModelName.GS3_MP, ModelName.LINEA_MINI, ModelName.LINEA_MICRA],
+)
+async def test_steam_ready_entity_for_all_machines(
+    hass: HomeAssistant,
+    mock_lamarzocco: MagicMock,
+    mock_config_entry: MockConfigEntry,
+    entity_registry: er.EntityRegistry,
+) -> None:
+    """Test the La Marzocco steam ready sensor for all machines."""
+
+    serial_number = mock_lamarzocco.serial_number
+    await async_init_integration(hass, mock_config_entry)
+
+    state = hass.states.get(f"sensor.{serial_number}_steam_boiler_ready_time")
+
+    assert state
+
+    entry = entity_registry.async_get(state.entity_id)
+    assert entry