diff --git a/src/lib/isFloat.js b/src/lib/isFloat.js
index 84bdc782c..544fae806 100644
--- a/src/lib/isFloat.js
+++ b/src/lib/isFloat.js
@@ -6,7 +6,10 @@ export default function isFloat(str, options) {
   assertString(str);
   options = options || {};
   const float = new RegExp(`^(?:[-+])?(?:[0-9]+)?(?:\\${options.locale ? decimal[options.locale] : '.'}[0-9]*)?(?:[eE][\\+\\-]?(?:[0-9]+))?$`);
-  if (str === '' || str === '.' || str === ',' || str === '-' || str === '+') {
+  const decimalSep = options.locale ? decimal[options.locale] : '.';
+  if (str === '' || str === '.' || str === ',' || str === '-' || str === '+'
+    || str === '+.' || str === '-.' || str === '+,' || str === '-,'
+    || str === `+${decimalSep}` || str === `-${decimalSep}`) {
     return false;
   }
   const value = parseFloat(str.replace(',', '.'));
diff --git a/test/validators.test.js b/test/validators.test.js
index 7d9d12690..8f361c18b 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -4657,6 +4657,8 @@ describe('Validators', () => {
         'foo',
         '20.foo',
         '2020-01-06T14:31:00.135Z',
+        '+.',
+        '-.',
       ],
     });
 
@@ -4711,6 +4713,8 @@ describe('Validators', () => {
         '',
         '.',
         'foo',
+        '+,',
+        '-,',
       ],
     });
 
@@ -4738,6 +4742,8 @@ describe('Validators', () => {
         '',
         '.',
         'foo',
+        '+٫',
+        '-٫',
       ],
     });