diff --git a/frontend/report/weekly/write.vue b/frontend/report/weekly/write.vue
index ed341f3..92c7ce8 100644
--- a/frontend/report/weekly/write.vue
+++ b/frontend/report/weekly/write.vue
@@ -553,7 +553,12 @@ onMounted(async () => {
   }
   
   await loadProjects()
-  await setDefaultWeek(user.employeeId)
+  const weekValid = await setDefaultWeek(user.employeeId)
+  
+  // 미래 주차로 접근한 경우 중단
+  if (weekValid === false) {
+    return
+  }
   
   // 이번 주차에 이미 작성한 보고서가 있는지 확인
   const existingReport = await checkExistingReport(user.employeeId)
@@ -645,9 +650,20 @@ async function setDefaultWeek(userId: number) {
   if (route.query.year && route.query.week) {
     const year = parseInt(route.query.year as string)
     const week = parseInt(route.query.week as string)
+    
+    // 미래 주차 검증
+    const currentWeek = getActualCurrentWeekInfo()
+    const isFutureWeek = year > currentWeek.year || (year === currentWeek.year && week > currentWeek.week)
+    
+    if (isFutureWeek) {
+      alert('작성할 수 없는 주차입니다.')
+      router.replace('/report/weekly')
+      return false
+    }
+    
     const weekInfo = getWeekDates(year, week)
     setWeekFromInfo(weekInfo)
-    return
+    return true
   }
   
   const now = new Date()
@@ -675,6 +691,8 @@ async function setDefaultWeek(userId: number) {
       console.error('지난주 보고서 확인 실패:', e)
     }
   }
+  
+  return true
 }
 
 // 지난주 계획을 이번주 실적에 로드