diff --git a/homeassistant/components/accuweather/weather.py b/homeassistant/components/accuweather/weather.py
index c97cc44aea3..00726f6db38 100644
--- a/homeassistant/components/accuweather/weather.py
+++ b/homeassistant/components/accuweather/weather.py
@@ -62,6 +62,9 @@ class AccuWeatherEntity(CoordinatorEntity, WeatherEntity):
         """Initialize."""
         super().__init__(coordinator)
         self._unit_system = API_METRIC if coordinator.is_metric else API_IMPERIAL
+        self._attr_wind_speed_unit = self.coordinator.data["Wind"]["Speed"][
+            self._unit_system
+        ]["Unit"]
         self._attr_name = name
         self._attr_unique_id = coordinator.location_key
         self._attr_temperature_unit = (
diff --git a/tests/components/accuweather/test_weather.py b/tests/components/accuweather/test_weather.py
index 6c1bc76e9b1..02ace5d3f1d 100644
--- a/tests/components/accuweather/test_weather.py
+++ b/tests/components/accuweather/test_weather.py
@@ -46,7 +46,7 @@ async def test_weather_without_forecast(hass):
     assert state.attributes.get(ATTR_WEATHER_TEMPERATURE) == 22.6
     assert state.attributes.get(ATTR_WEATHER_VISIBILITY) == 16.1
     assert state.attributes.get(ATTR_WEATHER_WIND_BEARING) == 180
-    assert state.attributes.get(ATTR_WEATHER_WIND_SPEED) == 14.5
+    assert state.attributes.get(ATTR_WEATHER_WIND_SPEED) == 4.03
     assert state.attributes.get(ATTR_ATTRIBUTION) == ATTRIBUTION
 
     entry = registry.async_get("weather.home")
@@ -68,7 +68,7 @@ async def test_weather_with_forecast(hass):
     assert state.attributes.get(ATTR_WEATHER_TEMPERATURE) == 22.6
     assert state.attributes.get(ATTR_WEATHER_VISIBILITY) == 16.1
     assert state.attributes.get(ATTR_WEATHER_WIND_BEARING) == 180
-    assert state.attributes.get(ATTR_WEATHER_WIND_SPEED) == 14.5
+    assert state.attributes.get(ATTR_WEATHER_WIND_SPEED) == 4.03
     assert state.attributes.get(ATTR_ATTRIBUTION) == ATTRIBUTION
     forecast = state.attributes.get(ATTR_FORECAST)[0]
     assert forecast.get(ATTR_FORECAST_CONDITION) == "lightning-rainy"
@@ -78,7 +78,7 @@ async def test_weather_with_forecast(hass):
     assert forecast.get(ATTR_FORECAST_TEMP_LOW) == 15.4
     assert forecast.get(ATTR_FORECAST_TIME) == "2020-07-26T05:00:00+00:00"
     assert forecast.get(ATTR_FORECAST_WIND_BEARING) == 166
-    assert forecast.get(ATTR_FORECAST_WIND_SPEED) == 13.0
+    assert forecast.get(ATTR_FORECAST_WIND_SPEED) == 3.61
 
     entry = registry.async_get("weather.home")
     assert entry