diff --git a/esphome/components/openthread/__init__.py b/esphome/components/openthread/__init__.py
index 215f921229..2dc8a783df 100644
--- a/esphome/components/openthread/__init__.py
+++ b/esphome/components/openthread/__init__.py
@@ -3,6 +3,9 @@ from esphome.components.esp32 import (
     VARIANT_ESP32C5,
     VARIANT_ESP32C6,
     VARIANT_ESP32H2,
+    VARIANT_ESP32H4,
+    VARIANT_ESP32H21,
+    VARIANT_ESP32S31,
     add_idf_sdkconfig_option,
     get_esp32_variant,
     include_builtin_idf_component,
@@ -187,7 +190,14 @@ def _validate_platform(config):
     if CORE.using_zephyr:
         return config
     return only_on_variant(
-        supported=[VARIANT_ESP32C5, VARIANT_ESP32C6, VARIANT_ESP32H2]
+        supported=[
+            VARIANT_ESP32C5,
+            VARIANT_ESP32C6,
+            VARIANT_ESP32H2,
+            VARIANT_ESP32H4,
+            VARIANT_ESP32H21,
+            VARIANT_ESP32S31,
+        ]
     )(config)
 
 
diff --git a/esphome/components/wifi/__init__.py b/esphome/components/wifi/__init__.py
index 1cfd2b9821..512fd63e12 100644
--- a/esphome/components/wifi/__init__.py
+++ b/esphome/components/wifi/__init__.py
@@ -76,14 +76,20 @@ _LOGGER = logging.getLogger(__name__)
 
 AUTO_LOAD = ["network"]
 
-NO_WIFI_VARIANTS = [const.VARIANT_ESP32H2, const.VARIANT_ESP32P4]
+NO_WIFI_VARIANTS = [
+    const.VARIANT_ESP32H2,
+    const.VARIANT_ESP32H4,
+    const.VARIANT_ESP32H21,
+    const.VARIANT_ESP32P4,
+]
 
 
 def variant_has_wifi(variant: str) -> bool:
     """Return True if *variant* has a native WiFi PHY.
 
-    Variants without a native PHY (ESP32-H2, ESP32-P4) need the
-    ``esp32_hosted`` co-processor to use ``wifi:``.
+    Variants without a native PHY (see ``NO_WIFI_VARIANTS`` — currently
+    ESP32-H2, ESP32-H4, ESP32-H21, ESP32-P4) need the ``esp32_hosted``
+    co-processor to use ``wifi:``.
 
     Case-insensitive on *variant* so external callers can pass either
     the upstream uppercase form (e.g. ``"ESP32H2"`` from