diff --git a/doc/whats-new.rst b/doc/whats-new.rst
index cbafe4d5999..5826211923a 100644
--- a/doc/whats-new.rst
+++ b/doc/whats-new.rst
@@ -55,6 +55,9 @@ Documentation
 ~~~~~~~~~~~~~
 - New section on :ref:`add_a_backend` in the "Internals" chapter aimed to backend developers
   (:issue:`4803`, :pull:`4810`). By `Aureliana Barghini <https://github.com/aurghs>`_.
+- Add :py:meth:`Dataset.polyfit` and :py:meth:`DataArray.polyfit` under "See also" in
+  the docstrings of :py:meth:`Dataset.polyfit` and :py:meth:`DataArray.polyfit`
+  (:issue:`5016`, :pull:`5020`). By `Aaron Spring <https://github.com/aaronspring>`_.
 
 
 Internal Changes
diff --git a/xarray/core/dataarray.py b/xarray/core/dataarray.py
index dd871eb21bc..5f944354901 100644
--- a/xarray/core/dataarray.py
+++ b/xarray/core/dataarray.py
@@ -3781,6 +3781,8 @@ def polyfit(
         See Also
         --------
         numpy.polyfit
+        numpy.polyval
+        xarray.polyval
         """
         return self._to_temp_dataset().polyfit(
             dim, deg, skipna=skipna, rcond=rcond, w=w, full=full, cov=cov
diff --git a/xarray/core/dataset.py b/xarray/core/dataset.py
index db45157e7c1..d76d136be8b 100644
--- a/xarray/core/dataset.py
+++ b/xarray/core/dataset.py
@@ -6399,6 +6399,8 @@ def polyfit(
         See Also
         --------
         numpy.polyfit
+        numpy.polyval
+        xarray.polyval
         """
         variables = {}
         skipna_da = skipna