diff --git a/backend/src/lib/summary.js b/backend/src/lib/summary.js
index 5f0fb77..37eef7c 100644
--- a/backend/src/lib/summary.js
+++ b/backend/src/lib/summary.js
@@ -14,6 +14,9 @@ const SNOW_ICONS = new Set(['snow-light', 'snow-heavy'])
 // without touching the logic that uses them.
 const UMBRELLA_SOFT_PRECIP_PCT = 10  // any remaining hour above this -> "might want"
 const JACKET_HIGH_TEMP_C = 12        // today's forecast high below this -> jacket tip
+const SUN_HIGH_TEMP_C = 26           // today's forecast high above this -> sun cream tip
+                                      // (a temp-based stand-in for a proper UV index,
+                                      // which neither provider is currently fetched for)
 
 // summarizeToday(points, nowHour) — `points` is today's hourly forecast_points rows
 // (already icon-normalized), `nowHour` is 0-23 in Europe/London. Returns null if
@@ -97,9 +100,12 @@ export function summarizeToday(points, nowHour) {
   }
 
   // Jacket: keyed off today's forecast high, not "right now" -- same framing
-  // as the big temp above it.
+  // as the big temp above it. Mutually exclusive with the sun tip below (never
+  // both -- one high temp can't be both below 12 and above 26).
   if (highPoint.temp_c < JACKET_HIGH_TEMP_C) {
     tips.push({ key: 'jacket', text: "Don't forget your jacket" })
+  } else if (highPoint.temp_c > SUN_HIGH_TEMP_C) {
+    tips.push({ key: 'sun', text: "Don't forget your sun cream" })
   }
 
   return {
diff --git a/frontend/src/pages/Display.tsx b/frontend/src/pages/Display.tsx
index cc85f14..6e2a8f1 100644
--- a/frontend/src/pages/Display.tsx
+++ b/frontend/src/pages/Display.tsx
@@ -1,5 +1,5 @@
 import { useEffect, useRef, useState } from 'react'
-import { CloudOff, Umbrella, Shirt } from 'lucide-react'
+import { CloudOff, Umbrella, Shirt, Sun } from 'lucide-react'
 import { fetchForecast, fetchDisplayConfig } from '../api'
 import { WeatherIcon } from '../lib/icons'
 import { PointMeta } from '../components/PointMeta'
@@ -14,6 +14,7 @@ const TIP_ICONS: Record<TipKey, typeof Umbrella> = {
   umbrella: Umbrella,
   'umbrella-soft': Umbrella,
   jacket: Shirt,
+  sun: Sun,
 }
 
 const POLL_MS = 5 * 60 * 1000 // client polls more often than the server's hourly
diff --git a/frontend/src/types.ts b/frontend/src/types.ts
index c7d9899..18b6421 100644
--- a/frontend/src/types.ts
+++ b/frontend/src/types.ts
@@ -23,7 +23,7 @@ export interface Astro {
   sunset: string | null
 }
 
-export type TipKey = 'umbrella' | 'umbrella-soft' | 'jacket'
+export type TipKey = 'umbrella' | 'umbrella-soft' | 'jacket' | 'sun'
 
 export interface Summary {
   headline: string        // "Scattered showers today", "Rain likely later", ...