diff --git a/ui-core/src/components/inputs/TimePicker.tsx b/ui-core/src/components/inputs/TimePicker.tsx
index 0d13258c9..f3d3fda98 100644
--- a/ui-core/src/components/inputs/TimePicker.tsx
+++ b/ui-core/src/components/inputs/TimePicker.tsx
@@ -8,7 +8,17 @@ import InputModal from '../Modal';
 export type TimePickerProps = InputProps & {
   hours?: number;
   minutes?: number;
-  onTimeChange: ({ hours, minutes }: { hours: number; minutes: number }) => void;
+  seconds?: number;
+  displaySeconds?: boolean;
+  onTimeChange: ({
+    hours,
+    minutes,
+    seconds,
+  }: {
+    hours: number;
+    minutes: number;
+    seconds?: number;
+  }) => void;
 };
 
 type TimeRangeProps = {
@@ -32,7 +42,14 @@ const TimeRange = ({ range, selectedItem, className, onSelectItem }: TimeRangePr
   </div>
 );
 
-const TimePicker = ({ onTimeChange, hours = 0, minutes = 0, ...otherProps }: TimePickerProps) => {
+const TimePicker = ({
+  onTimeChange,
+  hours = 0,
+  minutes = 0,
+  seconds = 0,
+  displaySeconds,
+  ...otherProps
+}: TimePickerProps) => {
   const [isModalOpen, setIsModalOpen] = useState<boolean>(false);
   const inputRef = useRef<HTMLInputElement>(null);
 
@@ -42,28 +59,61 @@ const TimePicker = ({ onTimeChange, hours = 0, minutes = 0, ...otherProps }: Tim
 
     if (newMinutes >= 60) {
       newMinutes = 0;
-      newHours = newHours === 23 ? 0 : newHours + 1;
+      newHours = (newHours + 1) % 24;
     } else if (newMinutes < 0) {
       newMinutes = 59;
-      newHours = newHours === 0 ? 23 : newHours - 1;
+      newHours = (newHours + 23) % 24; // minus 1 hour
     }
-    onTimeChange({ hours: newHours, minutes: newMinutes });
+    onTimeChange({ hours: newHours, minutes: newMinutes, seconds });
+  };
+
+  const incrementSeconds = (increment: number) => {
+    let newSeconds = seconds + increment;
+    let newMinutes = minutes;
+    let newHours = hours;
+
+    if (newSeconds >= 60) {
+      newSeconds = 0;
+      newMinutes += 1;
+
+      if (newMinutes >= 60) {
+        newMinutes = 0;
+        newHours = (newHours + 1) % 24;
+      }
+    } else if (newSeconds < 0) {
+      newSeconds = 59;
+      newMinutes -= 1;
+
+      if (newMinutes < 0) {
+        newMinutes = 59;
+        newHours = (newHours + 23) % 24; // minus 1 hour
+      }
+    }
+    onTimeChange({ hours: newHours, minutes: newMinutes, seconds: newSeconds });
   };
 
   const handleChange = (event: React.ChangeEvent<HTMLInputElement>) => {
     const value = event.target.value;
-    const [h, m] = value.split(':');
-    if (h !== undefined && m !== undefined) {
-      onTimeChange({ hours: parseInt(h), minutes: parseInt(m) });
+    if (!displaySeconds) {
+      const [h, m] = value.split(':');
+      if (h !== undefined && m !== undefined) {
+        onTimeChange({ hours: parseInt(h), minutes: parseInt(m) });
+      }
+    } else {
+      const [h, m, s] = value.split(':');
+      if (h !== undefined && m !== undefined && s !== undefined) {
+        onTimeChange({ hours: parseInt(h), minutes: parseInt(m), seconds: parseInt(s) });
+      }
     }
   };
 
   const formatTimeValue = (value: number, max: number) =>
     Math.max(0, Math.min(max, value)).toString().padStart(2, '0');
 
-  const selectedTime = `${formatTimeValue(hours, 23)}:${formatTimeValue(minutes, 59)}`;
+  const displayedSecondsPart = displaySeconds ? `:${formatTimeValue(seconds, 59)}` : '';
+  const selectedTime = `${formatTimeValue(hours, 23)}:${formatTimeValue(minutes, 59)}${displayedSecondsPart}`;
   const hoursRange = [...Array(24).keys()];
-  const minutesRange = [...Array(12).keys()].map((i) => i * 5);
+  const minutesAndSecondsRange = [...Array(12).keys()].map((i) => i * 5);
 
   const openModal = () => {
     setIsModalOpen(true);
@@ -74,12 +124,14 @@ const TimePicker = ({ onTimeChange, hours = 0, minutes = 0, ...otherProps }: Tim
   return (
     <div className="time-picker">
       <Input
+        className={cx('input', 'time-input')}
         type="time"
         name="time"
         value={selectedTime}
         onClick={openModal}
         onChange={handleChange}
         ref={inputRef}
+        step={displaySeconds ? 1 : 60}
         {...otherProps}
       />
       <InputModal inputRef={inputRef} isOpen={isModalOpen} onClose={closeModal}>
@@ -88,17 +140,17 @@ const TimePicker = ({ onTimeChange, hours = 0, minutes = 0, ...otherProps }: Tim
             range={hoursRange}
             selectedItem={hours}
             className="hour"
-            onSelectItem={(h) => onTimeChange({ hours: h, minutes })}
+            onSelectItem={(h) => onTimeChange({ hours: h, minutes, seconds })}
           />
 
           <div className="time-separator">:</div>
 
           <div className="minute-container">
             <TimeRange
-              range={minutesRange}
+              range={minutesAndSecondsRange}
               selectedItem={minutes}
               className="minute"
-              onSelectItem={(m) => onTimeChange({ hours: hours, minutes: m })}
+              onSelectItem={(m) => onTimeChange({ hours, minutes: m, seconds })}
             />
             <div className="minute-buttons">
               <button onClick={() => incrementMinute(-1)} className="minute-button">
@@ -109,6 +161,27 @@ const TimePicker = ({ onTimeChange, hours = 0, minutes = 0, ...otherProps }: Tim
               </button>
             </div>
           </div>
+          {displaySeconds && (
+            <>
+              <div className="time-separator">:</div>
+              <div className="second-container">
+                <TimeRange
+                  range={minutesAndSecondsRange}
+                  selectedItem={seconds}
+                  className="second"
+                  onSelectItem={(s) => onTimeChange({ hours, minutes, seconds: s })}
+                />
+                <div className="second-buttons">
+                  <button onClick={() => incrementSeconds(-1)} className="second-button">
+                    -1s
+                  </button>
+                  <button onClick={() => incrementSeconds(1)} className="second-button">
+                    +1s
+                  </button>
+                </div>
+              </div>
+            </>
+          )}
         </div>
       </InputModal>
     </div>
diff --git a/ui-core/src/stories/TimePicker.stories.tsx b/ui-core/src/stories/TimePicker.stories.tsx
index 4cfaf2615..b1e8526a0 100644
--- a/ui-core/src/stories/TimePicker.stories.tsx
+++ b/ui-core/src/stories/TimePicker.stories.tsx
@@ -9,19 +9,23 @@ import '@osrd-project/ui-core/dist/theme.css';
 const TimePickerStory = (props: TimePickerProps) => {
   const [selectedHour, setSelectedHour] = useState(props.hours);
   const [selectedMinute, setSelectedMinute] = useState(props.minutes);
-  const onTimeChange = (newTime: { hours: number; minutes: number }) => {
+  const [selectedSecond, setSelectedSecond] = useState(props.seconds);
+  const onTimeChange = (newTime: { hours: number; minutes: number; seconds?: number }) => {
     setSelectedHour(newTime.hours);
     setSelectedMinute(newTime.minutes);
+    setSelectedSecond(newTime.seconds);
   };
   useEffect(() => {
     setSelectedHour(props.hours);
     setSelectedMinute(props.minutes);
-  }, [props.hours, props.minutes]);
+    setSelectedSecond(props.seconds);
+  }, [props.hours, props.minutes, props.seconds]);
   return (
     <TimePicker
       {...props}
       hours={selectedHour}
       minutes={selectedMinute}
+      seconds={selectedSecond}
       onTimeChange={onTimeChange}
     />
   );
@@ -32,6 +36,7 @@ const meta: Meta<typeof TimePicker> = {
   args: {
     disabled: false,
     readOnly: false,
+    displaySeconds: false,
   },
   argTypes: {
     hours: {
@@ -53,13 +58,6 @@ const meta: Meta<typeof TimePicker> = {
   },
   title: 'Core/TimePicker',
   tags: ['autodocs'],
-  decorators: [
-    (Story) => (
-      <div style={{ maxWidth: '7rem' }}>
-        <Story />
-      </div>
-    ),
-  ],
   render: TimePickerStory,
 };
 
@@ -70,6 +68,13 @@ export const Default: Story = {
   args: {
     label: 'Time',
   },
+  decorators: [
+    (Story) => (
+      <div style={{ maxWidth: '6.7rem', minHeight: '500px' }}>
+        <Story />
+      </div>
+    ),
+  ],
 };
 
 export const DisabledTimePicker: Story = {
@@ -77,4 +82,25 @@ export const DisabledTimePicker: Story = {
     disabled: true,
     label: 'Time',
   },
+  decorators: [
+    (Story) => (
+      <div style={{ maxWidth: '6.7rem', minHeight: '500px' }}>
+        <Story />
+      </div>
+    ),
+  ],
+};
+
+export const TimePickerWithSeconds: Story = {
+  args: {
+    displaySeconds: true,
+    label: 'Time',
+  },
+  decorators: [
+    (Story) => (
+      <div style={{ maxWidth: '8.5rem', minHeight: '500px' }}>
+        <Story />
+      </div>
+    ),
+  ],
 };
diff --git a/ui-core/src/styles/inputs/timePicker.css b/ui-core/src/styles/inputs/timePicker.css
index 398a1d129..cf0200693 100644
--- a/ui-core/src/styles/inputs/timePicker.css
+++ b/ui-core/src/styles/inputs/timePicker.css
@@ -1,9 +1,11 @@
-.time-picker {
-  .time-input {
-    cursor: pointer;
+@-moz-document url-prefix() {
+  .time-picker .time-input {
+    letter-spacing: -0.9px;
   }
+}
 
-  input[type='time']::-webkit-calendar-picker-indicator {
+.time-picker {
+  .time-input::-webkit-calendar-picker-indicator {
     background: none;
     display: none;
   }
@@ -45,12 +47,14 @@
     font-size: 1.5rem;
   }
 
+  .second-container,
   .minute-container {
     position: relative;
     height: 14.188rem;
     align-content: center;
   }
 
+  .second-buttons,
   .minute-buttons {
     display: flex;
     position: absolute;
@@ -60,6 +64,7 @@
     gap: 0.75rem;
   }
 
+  .second-button,
   .minute-button {
     cursor: pointer;
     display: block;
@@ -83,11 +88,13 @@
   }
 
   .hour,
-  .minute {
+  .minute,
+  .second {
     font-size: 1.125rem;
     font-weight: 600;
     text-align: center;
-    line-height: 1.5rem;
+    vertical-align: center;
+    line-height: 1.9rem;
     cursor: pointer;
     width: 2.875rem;
     height: 1.875rem;