diff --git a/apps/web/src/components/timeline/TimelineTooltip.tsx b/apps/web/src/components/timeline/TimelineTooltip.tsx
index 54abdce..db4aa77 100644
--- a/apps/web/src/components/timeline/TimelineTooltip.tsx
+++ b/apps/web/src/components/timeline/TimelineTooltip.tsx
@@ -1,5 +1,6 @@
 "use client";
 
+import { createPortal } from "react-dom";
 import { formatCents, formatDateLong } from "~/lib/format.js";
 
 function getVacationTitle(vacation: VacationHoverData): string {
@@ -78,9 +79,11 @@ export function TimelineTooltip({
   demandHover,
 }: TimelineTooltipProps) {
   const vacationTitle = vacationHover ? getVacationTitle(vacationHover) : null;
+  const renderTooltip = (content: React.ReactNode) =>
+    typeof document === "undefined" ? content : createPortal(content, document.body);
 
   if (demandHover && demandTooltipRef && demandTooltipPos) {
-    return (
+    return renderTooltip(
       <div
         ref={demandTooltipRef}
         style={{
@@ -150,13 +153,13 @@ export function TimelineTooltip({
             </div>
           ) : null}
         </div>
-      </div>
+      </div>,
     );
   }
 
   // When both are active, render a single merged tooltip using the heatmap position
   if (heatmapHover && vacationHover) {
-    return (
+    return renderTooltip(
       <div
         ref={(el) => {
           // Wire both refs to the same element so position updates work from either handler
@@ -230,13 +233,13 @@ export function TimelineTooltip({
             <div className="mt-1 text-[11px] text-amber-200/60">{vacationHover.note}</div>
           ) : null}
         </div>
-      </div>
+      </div>,
     );
   }
 
   // Heatmap only
   if (heatmapHover) {
-    return (
+    return renderTooltip(
       <div
         ref={heatmapTooltipRef}
         style={{
@@ -289,13 +292,13 @@ export function TimelineTooltip({
             <div className="text-[11px] text-gray-400">No bookings on this day.</div>
           )}
         </div>
-      </div>
+      </div>,
     );
   }
 
   // Vacation only
   if (vacationHover) {
-    return (
+    return renderTooltip(
       <div
         ref={vacationTooltipRef}
         style={{
@@ -312,7 +315,7 @@ export function TimelineTooltip({
         {vacationHover.note && vacationHover.type !== "PUBLIC_HOLIDAY" ? (
           <div className="mt-2 text-[11px] text-amber-100/80">{vacationHover.note}</div>
         ) : null}
-      </div>
+      </div>,
     );
   }