diff --git a/esphome/components/socket/bsd_sockets_impl.cpp b/esphome/components/socket/bsd_sockets_impl.cpp
index ac4083ae2d..824a4bea45 100644
--- a/esphome/components/socket/bsd_sockets_impl.cpp
+++ b/esphome/components/socket/bsd_sockets_impl.cpp
@@ -34,6 +34,7 @@ int BSDSocketImpl::close() {
 #ifdef USE_LWIP_FAST_SELECT
     if (this->loop_monitored_) {
       App.unregister_socket(this->cached_sock_);
+      this->cached_sock_ = nullptr;
     }
 #else
     if (this->loop_monitored_) {
diff --git a/esphome/components/socket/lwip_sockets_impl.cpp b/esphome/components/socket/lwip_sockets_impl.cpp
index 810e6b090d..4c68da2aaf 100644
--- a/esphome/components/socket/lwip_sockets_impl.cpp
+++ b/esphome/components/socket/lwip_sockets_impl.cpp
@@ -34,6 +34,7 @@ int LwIPSocketImpl::close() {
 #ifdef USE_LWIP_FAST_SELECT
     if (this->loop_monitored_) {
       App.unregister_socket(this->cached_sock_);
+      this->cached_sock_ = nullptr;
     }
 #else
     if (this->loop_monitored_) {
diff --git a/esphome/components/socket/socket.cpp b/esphome/components/socket/socket.cpp
index 3e34b7c0bf..54111892a0 100644
--- a/esphome/components/socket/socket.cpp
+++ b/esphome/components/socket/socket.cpp
@@ -12,7 +12,7 @@ namespace esphome::socket {
 // Shared ready() implementation for fd-based socket implementations (BSD and LWIP sockets).
 // Uses cached lwip_sock pointer for direct rcvevent read — no fd lookup overhead.
 bool socket_ready(struct lwip_sock *cached_sock, bool loop_monitored) {
-  return !loop_monitored || esphome_lwip_socket_has_data(cached_sock);
+  return !loop_monitored || (cached_sock != nullptr && esphome_lwip_socket_has_data(cached_sock));
 }
 #elif defined(USE_SOCKET_SELECT_SUPPORT)
 // Shared ready() implementation for fd-based socket implementations (BSD and LWIP sockets).