diff --git a/cosmos/profiles/postgres/user_pass.py b/cosmos/profiles/postgres/user_pass.py
index 59188d2675..731d600794 100644
--- a/cosmos/profiles/postgres/user_pass.py
+++ b/cosmos/profiles/postgres/user_pass.py
@@ -40,8 +40,8 @@ class PostgresUserPasswordProfileMapping(BaseProfileMapping):
     def profile(self) -> dict[str, Any | None]:
         "Gets profile. The password is stored in an environment variable."
         profile = {
-            **self.mapped_params,
             "port": 5432,
+            **self.mapped_params,
             **self.profile_args,
             # password should always get set as env var
             "password": self.get_env_var_format("password"),
@@ -55,6 +55,6 @@ def mock_profile(self) -> dict[str, Any | None]:
         parent_mock = super().mock_profile
 
         return {
-            **parent_mock,
             "port": 5432,
+            **parent_mock,
         }
diff --git a/cosmos/profiles/redshift/user_pass.py b/cosmos/profiles/redshift/user_pass.py
index 2a4676b079..0dd3e115f4 100644
--- a/cosmos/profiles/redshift/user_pass.py
+++ b/cosmos/profiles/redshift/user_pass.py
@@ -41,8 +41,8 @@ class RedshiftUserPasswordProfileMapping(BaseProfileMapping):
     def profile(self) -> dict[str, Any | None]:
         "Gets profile."
         profile = {
-            **self.mapped_params,
             "port": 5439,
+            **self.mapped_params,
             **self.profile_args,
             # password should always get set as env var
             "password": self.get_env_var_format("password"),
@@ -56,6 +56,6 @@ def mock_profile(self) -> dict[str, Any | None]:
         parent_mock = super().mock_profile
 
         return {
-            **parent_mock,
             "port": 5439,
+            **parent_mock,
         }
diff --git a/tests/profiles/postgres/test_pg_user_pass.py b/tests/profiles/postgres/test_pg_user_pass.py
index db1a457014..3492450b5e 100644
--- a/tests/profiles/postgres/test_pg_user_pass.py
+++ b/tests/profiles/postgres/test_pg_user_pass.py
@@ -30,6 +30,25 @@ def mock_postgres_conn():  # type: ignore
         yield conn
 
 
+@pytest.fixture()
+def mock_postgres_conn_custom_port():  # type: ignore
+    """
+    Sets the connection as an environment variable.
+    """
+    conn = Connection(
+        conn_id="my_postgres_connection",
+        conn_type="postgres",
+        host="my_host",
+        login="my_user",
+        password="my_password",
+        port=7472,
+        schema="my_database",
+    )
+
+    with patch("airflow.hooks.base.BaseHook.get_connection", return_value=conn):
+        yield conn
+
+
 def test_connection_claiming() -> None:
     """
     Tests that the postgres profile mapping claims the correct connection type.
@@ -89,6 +108,11 @@ def test_profile_mapping_selected(
     assert isinstance(profile_mapping, PostgresUserPasswordProfileMapping)
 
 
+def test_profile_mapping_keeps_custom_port(mock_postgres_conn_custom_port: Connection) -> None:
+    profile = PostgresUserPasswordProfileMapping(mock_postgres_conn_custom_port.conn_id, {"schema": "my_schema"})
+    assert profile.profile["port"] == 7472
+
+
 def test_profile_args(
     mock_postgres_conn: Connection,
 ) -> None: