diff --git a/homeassistant/components/weather/__init__.py b/homeassistant/components/weather/__init__.py
index 6f2de6a3cb0..1fdb9173646 100644
--- a/homeassistant/components/weather/__init__.py
+++ b/homeassistant/components/weather/__init__.py
@@ -22,7 +22,9 @@ from homeassistant.const import (
     PRESSURE_INHG,
     PRESSURE_MBAR,
     PRESSURE_MMHG,
+    SPEED_FEET_PER_SECOND,
     SPEED_KILOMETERS_PER_HOUR,
+    SPEED_KNOTS,
     SPEED_METERS_PER_SECOND,
     SPEED_MILES_PER_HOUR,
     TEMP_CELSIUS,
@@ -118,8 +120,10 @@ VALID_UNITS_VISIBILITY: tuple[str, ...] = (
     LENGTH_MILES,
 )
 VALID_UNITS_WIND_SPEED: tuple[str, ...] = (
-    SPEED_METERS_PER_SECOND,
+    SPEED_FEET_PER_SECOND,
     SPEED_KILOMETERS_PER_HOUR,
+    SPEED_KNOTS,
+    SPEED_METERS_PER_SECOND,
     SPEED_MILES_PER_HOUR,
 )
 
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 7b91973a930..698f6bee240 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -608,10 +608,12 @@ CONCENTRATION_PARTS_PER_BILLION: Final = "ppb"
 
 # Speed units
 SPEED_MILLIMETERS_PER_DAY: Final = "mm/d"
+SPEED_FEET_PER_SECOND: Final = "ft/s"
 SPEED_INCHES_PER_DAY: Final = "in/d"
 SPEED_METERS_PER_SECOND: Final = "m/s"
 SPEED_INCHES_PER_HOUR: Final = "in/h"
 SPEED_KILOMETERS_PER_HOUR: Final = "km/h"
+SPEED_KNOTS: Final = "kn"
 SPEED_MILES_PER_HOUR: Final = "mph"
 
 # Signal_strength units
diff --git a/homeassistant/util/speed.py b/homeassistant/util/speed.py
index 14b28bde676..12618e020f8 100644
--- a/homeassistant/util/speed.py
+++ b/homeassistant/util/speed.py
@@ -5,9 +5,11 @@ from numbers import Number
 
 from homeassistant.const import (
     SPEED,
+    SPEED_FEET_PER_SECOND,
     SPEED_INCHES_PER_DAY,
     SPEED_INCHES_PER_HOUR,
     SPEED_KILOMETERS_PER_HOUR,
+    SPEED_KNOTS,
     SPEED_METERS_PER_SECOND,
     SPEED_MILES_PER_HOUR,
     SPEED_MILLIMETERS_PER_DAY,
@@ -15,24 +17,30 @@ from homeassistant.const import (
 )
 
 VALID_UNITS: tuple[str, ...] = (
+    SPEED_FEET_PER_SECOND,
     SPEED_INCHES_PER_DAY,
     SPEED_INCHES_PER_HOUR,
     SPEED_KILOMETERS_PER_HOUR,
+    SPEED_KNOTS,
     SPEED_METERS_PER_SECOND,
     SPEED_MILES_PER_HOUR,
     SPEED_MILLIMETERS_PER_DAY,
 )
 
+FOOT_TO_M = 0.3048
 HRS_TO_SECS = 60 * 60  # 1 hr = 3600 seconds
 IN_TO_M = 0.0254
 KM_TO_M = 1000  # 1 km = 1000 m
 MILE_TO_M = 1609.344
+NAUTICAL_MILE_TO_M = 1852  # 1 nautical mile = 1852 m
 
 # Units in terms of m/s
 UNIT_CONVERSION: dict[str, float] = {
+    SPEED_FEET_PER_SECOND: 1 / FOOT_TO_M,
     SPEED_INCHES_PER_DAY: (24 * HRS_TO_SECS) / IN_TO_M,
     SPEED_INCHES_PER_HOUR: HRS_TO_SECS / IN_TO_M,
     SPEED_KILOMETERS_PER_HOUR: HRS_TO_SECS / KM_TO_M,
+    SPEED_KNOTS: HRS_TO_SECS / NAUTICAL_MILE_TO_M,
     SPEED_METERS_PER_SECOND: 1,
     SPEED_MILES_PER_HOUR: HRS_TO_SECS / MILE_TO_M,
     SPEED_MILLIMETERS_PER_DAY: (24 * HRS_TO_SECS) * 1000,
diff --git a/tests/util/test_speed.py b/tests/util/test_speed.py
index f0a17e6ae15..9c7fd070313 100644
--- a/tests/util/test_speed.py
+++ b/tests/util/test_speed.py
@@ -2,9 +2,11 @@
 import pytest
 
 from homeassistant.const import (
+    SPEED_FEET_PER_SECOND,
     SPEED_INCHES_PER_DAY,
     SPEED_INCHES_PER_HOUR,
     SPEED_KILOMETERS_PER_HOUR,
+    SPEED_KNOTS,
     SPEED_METERS_PER_SECOND,
     SPEED_MILES_PER_HOUR,
     SPEED_MILLIMETERS_PER_DAY,
@@ -61,6 +63,10 @@ def test_convert_nonnumeric_value():
         (5, SPEED_METERS_PER_SECOND, 708661, SPEED_INCHES_PER_HOUR),
         # 5000 in/h / 39.3701 in/m / 3600 s/h = 0.03528 m/s
         (5000, SPEED_INCHES_PER_HOUR, 0.03528, SPEED_METERS_PER_SECOND),
+        # 5 kt * 1852 m/nmi / 3600 s/h = 2.5722 m/s
+        (5, SPEED_KNOTS, 2.5722, SPEED_METERS_PER_SECOND),
+        # 5 ft/s * 0.3048 m/ft = 1.524 m/s
+        (5, SPEED_FEET_PER_SECOND, 1.524, SPEED_METERS_PER_SECOND),
     ],
 )
 def test_convert_different_units(from_value, from_unit, expected, to_unit):