diff --git a/esphome/components/api/api_frame_helper.h b/esphome/components/api/api_frame_helper.h
index 98de24501ea..bec726b2a16 100644
--- a/esphome/components/api/api_frame_helper.h
+++ b/esphome/components/api/api_frame_helper.h
@@ -134,12 +134,16 @@ class APIFrameHelper {
   //
   // For log messages: Use Nagle to coalesce multiple small log packets into
   // fewer larger packets, reducing WiFi overhead. However, we limit batching
-  // to 3 messages to avoid excessive LWIP buffer pressure on memory-constrained
-  // devices like ESP8266. LWIP's TCP_OVERSIZE option coalesces the data into
-  // shared pbufs, but holding data too long waiting for Nagle's timer causes
-  // buffer exhaustion and dropped messages.
+  // to avoid excessive LWIP buffer pressure on memory-constrained devices.
+  // LWIP's TCP_OVERSIZE option coalesces the data into shared pbufs, but
+  // holding data too long waiting for Nagle's timer causes buffer exhaustion
+  // and dropped messages.
   //
-  // Flow: Log 1 (Nagle on) -> Log 2 (Nagle on) -> Log 3 (NODELAY, flush all)
+  // ESP32 (TCP_SND_BUF=64KB) / RP2040 (8×MSS): 4 logs per cycle
+  // ESP8266 / LibreTiny: 3 logs per cycle (tighter buffers)
+  //
+  // Flow (ESP32/RP2040): Log 1 (Nagle on) -> Log 2 -> Log 3 -> Log 4 (NODELAY, flush)
+  // Flow (other):        Log 1 (Nagle on) -> Log 2 -> Log 3 (NODELAY, flush all)
   //
   void set_nodelay_for_message(bool is_log_message) {
     if (!is_log_message) {
@@ -255,10 +259,16 @@ class APIFrameHelper {
   uint8_t tx_buf_tail_{0};
   uint8_t tx_buf_count_{0};
   // Nagle batching state for log messages. NODELAY_ON (-1) means NODELAY is enabled
-  // (immediate send). Values 1-2 count log messages in the current Nagle batch.
+  // (immediate send). Values 1..LOG_NAGLE_COUNT count log messages in the current Nagle batch.
   // After LOG_NAGLE_COUNT logs, we switch to NODELAY to flush and reset.
+  // ESP32 and RP2040 have larger TCP send buffers and can coalesce more;
+  // ESP8266 and LibreTiny have tighter buffers.
   static constexpr int8_t NODELAY_ON = -1;
+#if defined(USE_ESP32) || defined(USE_RP2040)
+  static constexpr int8_t LOG_NAGLE_COUNT = 3;
+#else
   static constexpr int8_t LOG_NAGLE_COUNT = 2;
+#endif
   int8_t nodelay_state_{NODELAY_ON};
 
   // Internal helper to set TCP_NODELAY socket option