diff --git a/frigate/output/preview.py b/frigate/output/preview.py
index 041d952d9..389a3c207 100644
--- a/frigate/output/preview.py
+++ b/frigate/output/preview.py
@@ -249,10 +249,9 @@ class PreviewRecorder:
             "v2": v2,
         }
 
-        # end segment at end of hour
+        # end segment at end of hour (use UTC to avoid DST issues)
         self.segment_end = (
-            (datetime.datetime.now() + datetime.timedelta(hours=1))
-            .astimezone(datetime.timezone.utc)
+            (datetime.datetime.now(datetime.timezone.utc) + datetime.timedelta(hours=1))
             .replace(minute=0, second=0, microsecond=0)
             .timestamp()
         )
@@ -264,8 +263,7 @@ class PreviewRecorder:
 
         # check for existing items in cache
         start_ts = (
-            datetime.datetime.now()
-            .astimezone(datetime.timezone.utc)
+            datetime.datetime.now(datetime.timezone.utc)
             .replace(minute=0, second=0, microsecond=0)
             .timestamp()
         )
@@ -299,8 +297,10 @@ class PreviewRecorder:
 
     def reset_frame_cache(self, frame_time: float) -> None:
         self.segment_end = (
-            (datetime.datetime.now() + datetime.timedelta(hours=1))
-            .astimezone(datetime.timezone.utc)
+            (
+                datetime.datetime.fromtimestamp(frame_time, tz=datetime.timezone.utc)
+                + datetime.timedelta(hours=1)
+            )
             .replace(minute=0, second=0, microsecond=0)
             .timestamp()
         )