diff --git a/homeassistant/components/noaa_tides/helpers.py b/homeassistant/components/noaa_tides/helpers.py
new file mode 100644
index 00000000000..734cca68f44
--- /dev/null
+++ b/homeassistant/components/noaa_tides/helpers.py
@@ -0,0 +1,6 @@
+"""Helpers for NOAA Tides integration."""
+
+
+def get_station_unique_id(station_id: str) -> str:
+    """Convert a station ID to a unique ID."""
+    return f"{station_id.lower()}"
diff --git a/homeassistant/components/noaa_tides/sensor.py b/homeassistant/components/noaa_tides/sensor.py
index 0af2c340960..3b5a13b0f15 100644
--- a/homeassistant/components/noaa_tides/sensor.py
+++ b/homeassistant/components/noaa_tides/sensor.py
@@ -22,6 +22,8 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 from homeassistant.util.unit_system import METRIC_SYSTEM
 
+from .helpers import get_station_unique_id
+
 if TYPE_CHECKING:
     from pandas import Timestamp
 
@@ -105,6 +107,7 @@ class NOAATidesAndCurrentsSensor(SensorEntity):
         self._unit_system = unit_system
         self._station = station
         self.data: NOAATidesData | None = None
+        self._attr_unique_id = f"{get_station_unique_id(station_id)}_summary"
 
     @property
     def name(self) -> str: