diff --git a/esphome/components/socket/lwip_raw_tcp_impl.cpp b/esphome/components/socket/lwip_raw_tcp_impl.cpp
index 0c0d64d198..d7fa6a2694 100644
--- a/esphome/components/socket/lwip_raw_tcp_impl.cpp
+++ b/esphome/components/socket/lwip_raw_tcp_impl.cpp
@@ -616,6 +616,7 @@ int LWIPRawImpl::internal_output_() {
 }
 
 ssize_t LWIPRawImpl::write(const void *buf, size_t len) {
+  LWIP_LOCK();  // Hold for write + optional output
   ssize_t written = this->internal_write_(buf, len);
   if (written == -1)
     return -1;