diff --git a/homeassistant/components/vesync/humidifier.py b/homeassistant/components/vesync/humidifier.py
index 86e0d6b5d87..40ea015f4d8 100644
--- a/homeassistant/components/vesync/humidifier.py
+++ b/homeassistant/components/vesync/humidifier.py
@@ -121,6 +121,8 @@ class VeSyncHumidifierHA(VeSyncBaseEntity, HumidifierEntity):
                 self._available_modes.append(ha_mode)
                 self._ha_to_vs_mode_map[ha_mode] = vs_mode
 
+        self._available_modes.sort()
+
     def _get_vs_mode(self, ha_mode: str) -> str | None:
         return self._ha_to_vs_mode_map.get(ha_mode)