diff --git a/src/database/migrations/2026_05_28_000000_add_performance_indexes.php b/src/database/migrations/2026_05_28_000000_add_performance_indexes.php
new file mode 100644
index 00000000..e3d3f621
--- /dev/null
+++ b/src/database/migrations/2026_05_28_000000_add_performance_indexes.php
@@ -0,0 +1,60 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('rainfall', function (Blueprint $table) {
+            $table->index('stationid', 'rainfall_stationid_index');
+            $table->index('timestamp', 'rainfall_timestamp_index');
+            $table->index(['stationid', 'timestamp'], 'rainfall_stationid_timestamp_index');
+        });
+
+        Schema::table('waterlevel', function (Blueprint $table) {
+            $table->index('stationid', 'waterlevel_stationid_index');
+            $table->index('datetime', 'waterlevel_datetime_index');
+            $table->index(['stationid', 'datetime'], 'waterlevel_stationid_datetime_index');
+        });
+
+        Schema::table('notification', function (Blueprint $table) {
+            $table->index('stationid', 'notification_stationid_index');
+            $table->index('timestamp', 'notification_timestamp_index');
+            $table->index('stationtype', 'notification_stationtype_index');
+        });
+
+        Schema::table('siren', function (Blueprint $table) {
+            $table->index('stationid', 'siren_stationid_index');
+            $table->index('active_time', 'siren_active_time_index');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('rainfall', function (Blueprint $table) {
+            $table->dropIndex('rainfall_stationid_timestamp_index');
+            $table->dropIndex('rainfall_timestamp_index');
+            $table->dropIndex('rainfall_stationid_index');
+        });
+
+        Schema::table('waterlevel', function (Blueprint $table) {
+            $table->dropIndex('waterlevel_stationid_datetime_index');
+            $table->dropIndex('waterlevel_datetime_index');
+            $table->dropIndex('waterlevel_stationid_index');
+        });
+
+        Schema::table('notification', function (Blueprint $table) {
+            $table->dropIndex('notification_stationtype_index');
+            $table->dropIndex('notification_timestamp_index');
+            $table->dropIndex('notification_stationid_index');
+        });
+
+        Schema::table('siren', function (Blueprint $table) {
+            $table->dropIndex('siren_active_time_index');
+            $table->dropIndex('siren_stationid_index');
+        });
+    }
+};