diff --git a/homeassistant/components/august/__init__.py b/homeassistant/components/august/__init__.py
index a646ee2bad5..c6a0f90fcaa 100644
--- a/homeassistant/components/august/__init__.py
+++ b/homeassistant/components/august/__init__.py
@@ -205,6 +205,7 @@ class AugustData:
             self._house_ids.add(device.house_id)
 
         self._doorbell_detail_by_id = {}
+        self._door_last_state_update_time_utc_by_id = {}
         self._lock_last_status_update_time_utc_by_id = {}
         self._lock_status_by_id = {}
         self._lock_detail_by_id = {}
@@ -290,6 +291,16 @@ class AugustData:
         _LOGGER.debug("Completed retrieving doorbell details")
         self._doorbell_detail_by_id = detail_by_id
 
+    def update_door_state(self, lock_id, door_state, update_start_time_utc):
+        """Set the door status and last status update time.
+
+        This is called when newer activity is detected on the activity feed
+        in order to keep the internal data in sync
+        """
+        self._door_state_by_id[lock_id] = door_state
+        self._door_last_state_update_time_utc_by_id[lock_id] = update_start_time_utc
+        return True
+
     def update_lock_status(self, lock_id, lock_status, update_start_time_utc):
         """Set the lock status and last status update time.
 
@@ -330,7 +341,8 @@ class AugustData:
     def _update_locks_status(self):
         status_by_id = {}
         state_by_id = {}
-        last_status_update_by_id = {}
+        lock_last_status_update_by_id = {}
+        door_last_state_update_by_id = {}
 
         _LOGGER.debug("Start retrieving lock and door status")
         for lock in self._locks:
@@ -346,9 +358,10 @@ class AugustData:
                 # Since there is a a race condition between calling the
                 # lock and activity apis, we set the last update time
                 # BEFORE making the api call since we will compare this
-                # to activity later we want activity to win over stale lock
+                # to activity later we want activity to win over stale lock/door
                 # state.
-                last_status_update_by_id[lock.device_id] = update_start_time_utc
+                lock_last_status_update_by_id[lock.device_id] = update_start_time_utc
+                door_last_state_update_by_id[lock.device_id] = update_start_time_utc
             except RequestException as ex:
                 _LOGGER.error(
                     "Request error trying to retrieve lock and door status for %s. %s",
@@ -365,7 +378,8 @@ class AugustData:
         _LOGGER.debug("Completed retrieving lock and door status")
         self._lock_status_by_id = status_by_id
         self._door_state_by_id = state_by_id
-        self._lock_last_status_update_time_utc_by_id = last_status_update_by_id
+        self._door_last_state_update_time_utc_by_id = door_last_state_update_by_id
+        self._lock_last_status_update_time_utc_by_id = lock_last_status_update_by_id
 
     def get_last_lock_status_update_time_utc(self, lock_id):
         """Return the last time that a lock status update was seen from the august API."""
@@ -377,6 +391,16 @@ class AugustData:
 
         return self._lock_last_status_update_time_utc_by_id[lock_id]
 
+    def get_last_door_state_update_time_utc(self, lock_id):
+        """Return the last time that a door status update was seen from the august API."""
+        # Since the activity api is called more frequently than
+        # the lock api it is possible that the door has not
+        # been updated yet
+        if lock_id not in self._door_last_state_update_time_utc_by_id:
+            return dt.utc_from_timestamp(0)
+
+        return self._door_last_state_update_time_utc_by_id[lock_id]
+
     @Throttle(MIN_TIME_BETWEEN_LOCK_DETAIL_UPDATES)
     def _update_locks_detail(self):
         detail_by_id = {}
diff --git a/homeassistant/components/august/binary_sensor.py b/homeassistant/components/august/binary_sensor.py
index f840d3db532..0984eb0629f 100644
--- a/homeassistant/components/august/binary_sensor.py
+++ b/homeassistant/components/august/binary_sensor.py
@@ -6,6 +6,7 @@ from august.activity import ActivityType
 from august.lock import LockDoorStatus
 
 from homeassistant.components.binary_sensor import BinarySensorDevice
+from homeassistant.util import dt
 
 from . import DATA_AUGUST
 
@@ -137,6 +138,52 @@ class AugustDoorBinarySensor(BinarySensorDevice):
 
         self._state = self._state == LockDoorStatus.OPEN
 
+        activity = self._data.get_latest_device_activity(
+            self._door.device_id, ActivityType.DOOR_OPERATION
+        )
+
+        if activity is not None:
+            self._sync_door_activity(activity)
+
+    def _update_door_state(self, door_state, update_start_time):
+        new_state = door_state == LockDoorStatus.OPEN
+        if self._state != new_state:
+            self._state = new_state
+            self._data.update_door_state(
+                self._door.device_id, door_state, update_start_time
+            )
+
+    def _sync_door_activity(self, activity):
+        """Check the activity for the latest door open/close activity (events).
+
+        We use this to determine the door state in between calls to the lock
+        api as we update it more frequently
+        """
+        last_door_state_update_time_utc = self._data.get_last_door_state_update_time_utc(
+            self._door.device_id
+        )
+        activity_end_time_utc = dt.as_utc(activity.activity_end_time)
+
+        if activity_end_time_utc > last_door_state_update_time_utc:
+            _LOGGER.debug(
+                "The activity log has new events for %s: [action=%s] [activity_end_time_utc=%s] > [last_door_state_update_time_utc=%s]",
+                self.name,
+                activity.action,
+                activity_end_time_utc,
+                last_door_state_update_time_utc,
+            )
+            activity_start_time_utc = dt.as_utc(activity.activity_start_time)
+            if activity.action == "doorclosed":
+                self._update_door_state(LockDoorStatus.CLOSED, activity_start_time_utc)
+            elif activity.action == "dooropen":
+                self._update_door_state(LockDoorStatus.OPEN, activity_start_time_utc)
+            else:
+                _LOGGER.info(
+                    "Unhandled door activity action %s for %s",
+                    activity.action,
+                    self.name,
+                )
+
     @property
     def unique_id(self) -> str:
         """Get the unique of the door open binary sensor."""
diff --git a/homeassistant/components/august/manifest.json b/homeassistant/components/august/manifest.json
index bacd7346ca7..f74e20f38c2 100644
--- a/homeassistant/components/august/manifest.json
+++ b/homeassistant/components/august/manifest.json
@@ -2,7 +2,7 @@
   "domain": "august",
   "name": "August",
   "documentation": "https://www.home-assistant.io/integrations/august",
-  "requirements": ["py-august==0.8.1"],
+  "requirements": ["py-august==0.11.0"],
   "dependencies": ["configurator"],
   "codeowners": []
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index a80435d71ff..0dac9a0b481 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1074,7 +1074,7 @@ pushover_complete==1.1.1
 pwmled==1.4.1
 
 # homeassistant.components.august
-py-august==0.8.1
+py-august==0.11.0
 
 # homeassistant.components.canary
 py-canary==0.5.0