diff --git a/CHANGELOG.md b/CHANGELOG.md
index 50631f9..1a350ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -229,9 +229,12 @@ e este projeto adere ao [Semantic Versioning](https://semver.org/lang/pt-BR/).
   - Tooltip personalizado com informações detalhadas
   - Agrupamento automático por semana
   - Layout responsivo e adaptável
+  - Filtro de período com opções de 3, 6, 12 meses e todo período
+  - Visualização padrão dos últimos 12 meses
 
 ### Técnico
 - Implementação do Recharts para visualização de dados
 - Novo sistema de processamento de métricas semanais
 - Otimização do carregamento de dados com agrupamento eficiente
 - Integração com o tema existente do sistema
+- Sistema de filtragem temporal com conversão de datas
diff --git a/src/pages/student-dashboard/StudentDashboardPage.tsx b/src/pages/student-dashboard/StudentDashboardPage.tsx
index 4494c54..b99db8b 100644
--- a/src/pages/student-dashboard/StudentDashboardPage.tsx
+++ b/src/pages/student-dashboard/StudentDashboardPage.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { Plus, BookOpen, Clock, TrendingUp, Award, Mic, Target, Brain, Gauge, Pause, XCircle, HelpCircle } from 'lucide-react';
+import { Plus, BookOpen, Clock, TrendingUp, Award, Mic, Target, Brain, Gauge, Pause, XCircle, HelpCircle, Calendar } from 'lucide-react';
 import { useNavigate } from 'react-router-dom';
 import { supabase } from '../../lib/supabase';
 import type { Story, Student } from '../../types/database';
@@ -59,6 +59,14 @@ interface MetricConfig {
   color: string;
 }
 
+type TimeFilter = '3m' | '6m' | '12m' | 'all';
+
+interface TimeFilterOption {
+  value: TimeFilter;
+  label: string;
+  months: number | null;
+}
+
 const METRICS_CONFIG: MetricConfig[] = [
   { key: 'fluency', name: 'Fluência', color: '#6366f1' },
   { key: 'pronunciation', name: 'Pronúncia', color: '#f43f5e' },
@@ -67,6 +75,13 @@ const METRICS_CONFIG: MetricConfig[] = [
   { key: 'wordsPerMinute', name: 'Palavras/Min', color: '#8b5cf6' }
 ];
 
+const TIME_FILTERS: TimeFilterOption[] = [
+  { value: '3m', label: '3 meses', months: 3 },
+  { value: '6m', label: '6 meses', months: 6 },
+  { value: '12m', label: '12 meses', months: 12 },
+  { value: 'all', label: 'Todo período', months: null },
+];
+
 export function StudentDashboardPage() {
   const navigate = useNavigate();
   const [student, setStudent] = React.useState<Student | null>(null);
@@ -89,6 +104,7 @@ export function StudentDashboardPage() {
   const [visibleMetrics, setVisibleMetrics] = React.useState<Set<string>>(
     new Set(METRICS_CONFIG.map(metric => metric.key))
   );
+  const [timeFilter, setTimeFilter] = React.useState<TimeFilter>('12m');
 
   const processWeeklyMetrics = (recordings: Recording[]) => {
     const weeklyData = recordings.reduce((acc: { [key: string]: WeeklyData }, recording) => {
@@ -149,6 +165,20 @@ export function StudentDashboardPage() {
     });
   };
 
+  const filterDataByTime = (data: WeeklyMetrics[]): WeeklyMetrics[] => {
+    if (timeFilter === 'all') return data;
+    
+    const months = TIME_FILTERS.find(f => f.value === timeFilter)?.months || 12;
+    const cutoffDate = new Date();
+    cutoffDate.setMonth(cutoffDate.getMonth() - months);
+    
+    return data.filter(item => {
+      const [year, week] = item.week.split('-W').map(Number);
+      const itemDate = new Date(year, 0, 1 + (week - 1) * 7);
+      return itemDate >= cutoffDate;
+    });
+  };
+
   React.useEffect(() => {
     const fetchDashboardData = async () => {
       try {
@@ -310,6 +340,8 @@ export function StudentDashboardPage() {
   }
 
   const renderMetricsChart = () => {
+    const filteredData = filterDataByTime(weeklyMetrics);
+    
     return (
       <div className="bg-white rounded-xl shadow-sm border border-gray-200 p-8 mb-8">
         <div className="flex flex-col gap-6">
@@ -318,7 +350,26 @@ export function StudentDashboardPage() {
               <h2 className="text-xl font-semibold text-gray-900">Evolução das Métricas por Semana</h2>
               <p className="text-sm text-gray-500">Acompanhe seu progresso ao longo do tempo</p>
             </div>
-            <div className="flex items-center gap-2">
+            <div className="flex items-center gap-4">
+              {/* Filtro de Período */}
+              <div className="flex items-center gap-2 bg-gray-50 p-1 rounded-lg">
+                <Calendar className="h-4 w-4 text-gray-500" />
+                {TIME_FILTERS.map(filter => (
+                  <button
+                    key={filter.value}
+                    onClick={() => setTimeFilter(filter.value)}
+                    className={`
+                      px-3 py-1 rounded-md text-sm font-medium transition-all duration-200
+                      ${timeFilter === filter.value
+                        ? 'bg-white text-purple-600 shadow-sm'
+                        : 'text-gray-600 hover:bg-gray-100'
+                      }
+                    `}
+                  >
+                    {filter.label}
+                  </button>
+                ))}
+              </div>
               <div 
                 className="text-gray-400 hover:text-gray-600 cursor-help transition-colors"
                 title="Gráfico mostrando a evolução das suas métricas de leitura ao longo das semanas"
@@ -358,7 +409,7 @@ export function StudentDashboardPage() {
 
           <div className="h-[400px] w-full">
             <ResponsiveContainer width="100%" height="100%">
-              <ComposedChart data={weeklyMetrics} margin={{ top: 20, right: 30, left: 20, bottom: 20 }}>
+              <ComposedChart data={filteredData} margin={{ top: 20, right: 30, left: 20, bottom: 20 }}>
                 <defs>
                   <linearGradient id="barGradient" x1="0" y1="0" x2="0" y2="1">
                     <stop offset="0%" stopColor="#6366f1" stopOpacity={0.3} />