diff --git a/homeassistant/components/hydrawise/const.py b/homeassistant/components/hydrawise/const.py
index dc53d847b1f..724b6ee6203 100644
--- a/homeassistant/components/hydrawise/const.py
+++ b/homeassistant/components/hydrawise/const.py
@@ -9,7 +9,7 @@ ALLOWED_WATERING_TIME = [5, 10, 15, 30, 45, 60]
 CONF_WATERING_TIME = "watering_minutes"
 
 DOMAIN = "hydrawise"
-DEFAULT_WATERING_TIME = 15
+DEFAULT_WATERING_TIME = timedelta(minutes=15)
 
 MANUFACTURER = "Hydrawise"
 
diff --git a/homeassistant/components/hydrawise/switch.py b/homeassistant/components/hydrawise/switch.py
index 5dd79d4a13e..5a3a3a62895 100644
--- a/homeassistant/components/hydrawise/switch.py
+++ b/homeassistant/components/hydrawise/switch.py
@@ -52,9 +52,9 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
         vol.Optional(CONF_MONITORED_CONDITIONS, default=SWITCH_KEYS): vol.All(
             cv.ensure_list, [vol.In(SWITCH_KEYS)]
         ),
-        vol.Optional(CONF_WATERING_TIME, default=DEFAULT_WATERING_TIME): vol.All(
-            vol.In(ALLOWED_WATERING_TIME)
-        ),
+        vol.Optional(
+            CONF_WATERING_TIME, default=DEFAULT_WATERING_TIME.total_seconds() // 60
+        ): vol.All(vol.In(ALLOWED_WATERING_TIME)),
     }
 )
 
@@ -96,7 +96,7 @@ class HydrawiseSwitch(HydrawiseEntity, SwitchEntity):
         """Turn the device on."""
         if self.entity_description.key == "manual_watering":
             await self.coordinator.api.start_zone(
-                self.zone, custom_run_duration=DEFAULT_WATERING_TIME
+                self.zone, custom_run_duration=DEFAULT_WATERING_TIME.total_seconds()
             )
         elif self.entity_description.key == "auto_watering":
             await self.coordinator.api.resume_zone(self.zone)
diff --git a/tests/components/hydrawise/test_switch.py b/tests/components/hydrawise/test_switch.py
index 30a58735122..f044d3467cd 100644
--- a/tests/components/hydrawise/test_switch.py
+++ b/tests/components/hydrawise/test_switch.py
@@ -51,7 +51,7 @@ async def test_manual_watering_services(
         blocking=True,
     )
     mock_pydrawise.start_zone.assert_called_once_with(
-        zones[0], custom_run_duration=DEFAULT_WATERING_TIME
+        zones[0], custom_run_duration=DEFAULT_WATERING_TIME.total_seconds()
     )
     state = hass.states.get("switch.zone_one_manual_watering")
     assert state is not None