diff --git a/esphome/components/api/api.proto b/esphome/components/api/api.proto
index 18dac6a2d1..d7f32cd8d1 100644
--- a/esphome/components/api/api.proto
+++ b/esphome/components/api/api.proto
@@ -989,6 +989,7 @@ enum ClimateAction {
   CLIMATE_ACTION_IDLE = 4;
   CLIMATE_ACTION_DRYING = 5;
   CLIMATE_ACTION_FAN = 6;
+  CLIMATE_ACTION_DEFROSTING = 7;
 }
 enum ClimatePreset {
   CLIMATE_PRESET_NONE = 0;
diff --git a/esphome/components/api/api_pb2.h b/esphome/components/api/api_pb2.h
index c2675cefe4..22dc3de995 100644
--- a/esphome/components/api/api_pb2.h
+++ b/esphome/components/api/api_pb2.h
@@ -116,6 +116,7 @@ enum ClimateAction : uint32_t {
   CLIMATE_ACTION_IDLE = 4,
   CLIMATE_ACTION_DRYING = 5,
   CLIMATE_ACTION_FAN = 6,
+  CLIMATE_ACTION_DEFROSTING = 7,
 };
 enum ClimatePreset : uint32_t {
   CLIMATE_PRESET_NONE = 0,
diff --git a/esphome/components/api/api_pb2_dump.cpp b/esphome/components/api/api_pb2_dump.cpp
index 73690610ed..52d2486410 100644
--- a/esphome/components/api/api_pb2_dump.cpp
+++ b/esphome/components/api/api_pb2_dump.cpp
@@ -321,6 +321,8 @@ template<> const char *proto_enum_to_string<enums::ClimateAction>(enums::Climate
       return "CLIMATE_ACTION_DRYING";
     case enums::CLIMATE_ACTION_FAN:
       return "CLIMATE_ACTION_FAN";
+    case enums::CLIMATE_ACTION_DEFROSTING:
+      return "CLIMATE_ACTION_DEFROSTING";
     default:
       return "UNKNOWN";
   }
diff --git a/esphome/components/climate/climate_mode.cpp b/esphome/components/climate/climate_mode.cpp
index c4dd19d503..8e443f4146 100644
--- a/esphome/components/climate/climate_mode.cpp
+++ b/esphome/components/climate/climate_mode.cpp
@@ -10,8 +10,10 @@ const LogString *climate_mode_to_string(ClimateMode mode) {
   return ClimateModeStrings::get_log_str(static_cast<uint8_t>(mode), ClimateModeStrings::LAST_INDEX);
 }
 
-// Climate action strings indexed by ClimateAction enum (0,2-6): OFF, (gap), COOLING, HEATING, IDLE, DRYING, FAN
-PROGMEM_STRING_TABLE(ClimateActionStrings, "OFF", "UNKNOWN", "COOLING", "HEATING", "IDLE", "DRYING", "FAN", "UNKNOWN");
+// Climate action strings indexed by ClimateAction enum (0,2-7): OFF, (gap), COOLING, HEATING, IDLE, DRYING, FAN,
+// DEFROSTING
+PROGMEM_STRING_TABLE(ClimateActionStrings, "OFF", "UNKNOWN", "COOLING", "HEATING", "IDLE", "DRYING", "FAN",
+                     "DEFROSTING", "UNKNOWN");
 
 const LogString *climate_action_to_string(ClimateAction action) {
   return ClimateActionStrings::get_log_str(static_cast<uint8_t>(action), ClimateActionStrings::LAST_INDEX);
diff --git a/esphome/components/climate/climate_mode.h b/esphome/components/climate/climate_mode.h
index c961c44248..014b1a9e64 100644
--- a/esphome/components/climate/climate_mode.h
+++ b/esphome/components/climate/climate_mode.h
@@ -41,6 +41,8 @@ enum ClimateAction : uint8_t {
   CLIMATE_ACTION_DRYING = 5,
   /// The climate device is in fan only mode
   CLIMATE_ACTION_FAN = 6,
+  /// The climate device is defrosting
+  CLIMATE_ACTION_DEFROSTING = 7,
 };
 
 /// NOTE: If adding values, update ClimateFanModeMask in climate_traits.h to use the new last value
diff --git a/esphome/components/mqtt/mqtt_climate.cpp b/esphome/components/mqtt/mqtt_climate.cpp
index 81b2e0e8db..443c983efe 100644
--- a/esphome/components/mqtt/mqtt_climate.cpp
+++ b/esphome/components/mqtt/mqtt_climate.cpp
@@ -20,9 +20,10 @@ static ProgmemStr climate_mode_to_mqtt_str(ClimateMode mode) {
   return ClimateMqttModeStrings::get_progmem_str(static_cast<uint8_t>(mode), ClimateMqttModeStrings::LAST_INDEX);
 }
 
-// Climate action MQTT strings indexed by ClimateAction enum (0,2-6): OFF, (gap), COOLING, HEATING, IDLE, DRYING, FAN
+// Climate action MQTT strings indexed by ClimateAction enum (0,2-7): OFF, (gap), COOLING, HEATING, IDLE, DRYING, FAN,
+// DEFROSTING
 PROGMEM_STRING_TABLE(ClimateMqttActionStrings, "off", "unknown", "cooling", "heating", "idle", "drying", "fan",
-                     "unknown");
+                     "defrosting", "unknown");
 
 static ProgmemStr climate_action_to_mqtt_str(ClimateAction action) {
   return ClimateMqttActionStrings::get_progmem_str(static_cast<uint8_t>(action), ClimateMqttActionStrings::LAST_INDEX);