diff --git a/esphome/components/libretiny/core.cpp b/esphome/components/libretiny/core.cpp
index 893a79440a..6bb2d9dcc1 100644
--- a/esphome/components/libretiny/core.cpp
+++ b/esphome/components/libretiny/core.cpp
@@ -7,6 +7,9 @@
 #include "esphome/core/helpers.h"
 #include "preferences.h"
 
+#include <FreeRTOS.h>
+#include <task.h>
+
 void setup();
 void loop();
 
@@ -22,6 +25,22 @@ void IRAM_ATTR HOT delayMicroseconds(uint32_t us) { ::delayMicroseconds(us); }
 void arch_init() {
   libretiny::setup_preferences();
   lt_wdt_enable(10000L);
+#ifdef USE_BK72XX
+  // BK72xx SDK creates the main Arduino task at priority 3, which is lower than
+  // all WiFi (4-5), LwIP (4), and TCP/IP (7) tasks. This causes ~100ms loop
+  // stalls whenever WiFi background processing runs, because the main task
+  // cannot resume until every higher-priority task finishes.
+  //
+  // By contrast, RTL87xx creates the main task at osPriorityRealtime (highest).
+  //
+  // Raise to priority 6: above WiFi/LwIP tasks (4-5) so they don't preempt the
+  // main loop, but below the TCP/IP thread (7) so packet processing keeps priority.
+  // This is safe because ESPHome yields voluntarily via yield_with_select_() and
+  // the Arduino mainTask yield() after each loop() iteration.
+  static constexpr UBaseType_t MAIN_TASK_PRIORITY = 6;
+  static_assert(MAIN_TASK_PRIORITY < configMAX_PRIORITIES, "MAIN_TASK_PRIORITY must be less than configMAX_PRIORITIES");
+  vTaskPrioritySet(nullptr, MAIN_TASK_PRIORITY);
+#endif
 #if LT_GPIO_RECOVER
   lt_gpio_recover();
 #endif