diff --git a/src/core/environment.js b/src/core/environment.js
index 06e678c6b9..0de830c7c4 100644
--- a/src/core/environment.js
+++ b/src/core/environment.js
@@ -772,6 +772,11 @@ p5.prototype.windowHeight = 0;
 p5.prototype._onresize = function(e) {
   this._setProperty('windowWidth', getWindowWidth());
   this._setProperty('windowHeight', getWindowHeight());
+  // Update mouse coordinates when window resizes
+  // This ensures mouseX/mouseY reflect the mouse position relative to the new canvas size
+  if (this._hasMouseInteracted && this._lastMouseEvent) {
+    this._updateNextMouseCoords(this._lastMouseEvent);
+  }
   const context = this._isGlobal ? window : this;
   let executeDefault;
   if (typeof context.windowResized === 'function') {
diff --git a/src/events/mouse.js b/src/events/mouse.js
index 7d83626962..34a9b848c5 100644
--- a/src/events/mouse.js
+++ b/src/events/mouse.js
@@ -820,6 +820,8 @@ p5.prototype._updateNextMouseCoords = function(e) {
       e
     );
 
+    // Store the last mouse event for recalculating coordinates on resize
+    this._setProperty('_lastMouseEvent', e);
 
     this._setProperty('mouseX', mousePos.x);
     this._setProperty('mouseY', mousePos.y);