diff --git a/aurora-livecam/WeatherManager.php b/aurora-livecam/WeatherManager.php
index 4bc6dd0..bd96cec 100644
--- a/aurora-livecam/WeatherManager.php
+++ b/aurora-livecam/WeatherManager.php
@@ -1,6 +1,7 @@
 <?php
 /**
- * WeatherManager - Holt und cached Wetterdaten von OpenWeatherMap
+ * WeatherManager - Holt und cached Wetterdaten von Open-Meteo (kostenlos!)
+ * Keine API Key nötig!
  */
 class WeatherManager {
     private $settingsManager;
@@ -20,23 +21,22 @@ class WeatherManager {
             return null;
         }
 
-        // Prüfe API Key
-        $apiKey = $this->settingsManager->getWeatherApiKey();
-        if (empty($apiKey)) {
-            return ['error' => 'API Key fehlt'];
-        }
-
         // Prüfe Cache
         $cached = $this->getCache();
         if ($cached !== null) {
             return $cached;
         }
 
-        // Hole frische Daten von API
+        // Hole frische Daten von API (Open-Meteo)
         $coords = $this->settingsManager->getWeatherCoords();
-        $units = $this->settingsManager->getWeatherUnits();
 
-        $url = "https://api.openweathermap.org/data/2.5/weather?lat={$coords['lat']}&lon={$coords['lon']}&units={$units}&appid={$apiKey}&lang=de";
+        // Open-Meteo API URL - komplett kostenlos, kein API Key!
+        $url = "https://api.open-meteo.com/v1/forecast?" . http_build_query([
+            'latitude' => $coords['lat'],
+            'longitude' => $coords['lon'],
+            'current' => 'temperature_2m,relative_humidity_2m,precipitation,weather_code,wind_speed_10m,wind_direction_10m,pressure_msl,cloud_cover',
+            'timezone' => 'Europe/Zurich'
+        ]);
 
         $ch = curl_init();
         curl_setopt($ch, CURLOPT_URL, $url);
@@ -53,25 +53,27 @@ class WeatherManager {
         }
 
         $data = json_decode($response, true);
-        if (!$data || !isset($data['main'])) {
+        if (!$data || !isset($data['current'])) {
             return ['error' => 'Ungültige API Antwort'];
         }
 
+        $current = $data['current'];
+
         // Formatiere Daten
         $weather = [
-            'temp' => round($data['main']['temp'], 1),
-            'feels_like' => round($data['main']['feels_like'], 1),
-            'humidity' => $data['main']['humidity'],
-            'pressure' => $data['main']['pressure'],
-            'wind_speed' => round($data['wind']['speed'] * 3.6, 1), // m/s -> km/h
-            'wind_deg' => $data['wind']['deg'] ?? 0,
-            'wind_direction' => $this->getWindDirection($data['wind']['deg'] ?? 0),
-            'clouds' => $data['clouds']['all'] ?? 0,
-            'description' => ucfirst($data['weather'][0]['description'] ?? 'Unbekannt'),
-            'icon' => $data['weather'][0]['icon'] ?? '01d',
-            'rain_1h' => $data['rain']['1h'] ?? 0,
-            'snow_1h' => $data['snow']['1h'] ?? 0,
-            'location' => $data['name'] ?? $this->settingsManager->getWeatherLocation(),
+            'temp' => round($current['temperature_2m'], 1),
+            'feels_like' => round($current['temperature_2m'], 1), // Open-Meteo hat keine "feels like"
+            'humidity' => $current['relative_humidity_2m'],
+            'pressure' => round($current['pressure_msl'], 0),
+            'wind_speed' => round($current['wind_speed_10m'], 1), // Schon in km/h!
+            'wind_deg' => $current['wind_direction_10m'],
+            'wind_direction' => $this->getWindDirection($current['wind_direction_10m']),
+            'clouds' => $current['cloud_cover'] ?? 0,
+            'description' => $this->getWeatherDescription($current['weather_code']),
+            'icon' => $this->getWeatherIcon($current['weather_code']),
+            'rain_1h' => $current['precipitation'] ?? 0,
+            'snow_1h' => 0, // Open-Meteo gibt Niederschlag gesamt
+            'location' => $this->settingsManager->getWeatherLocation(),
             'timestamp' => time()
         ];
 
@@ -81,6 +83,59 @@ class WeatherManager {
         return $weather;
     }
 
+    /**
+     * Wandelt WMO Weather Code in Beschreibung um
+     * https://open-meteo.com/en/docs
+     */
+    private function getWeatherDescription($code) {
+        $descriptions = [
+            0 => 'Klar',
+            1 => 'Überwiegend klar',
+            2 => 'Teilweise bewölkt',
+            3 => 'Bewölkt',
+            45 => 'Neblig',
+            48 => 'Nebel mit Reifablagerung',
+            51 => 'Leichter Nieselregen',
+            53 => 'Mäßiger Nieselregen',
+            55 => 'Dichter Nieselregen',
+            61 => 'Leichter Regen',
+            63 => 'Mäßiger Regen',
+            65 => 'Starker Regen',
+            71 => 'Leichter Schneefall',
+            73 => 'Mäßiger Schneefall',
+            75 => 'Starker Schneefall',
+            77 => 'Schneegraupeln',
+            80 => 'Leichte Regenschauer',
+            81 => 'Mäßige Regenschauer',
+            82 => 'Starke Regenschauer',
+            85 => 'Leichte Schneeschauer',
+            86 => 'Starke Schneeschauer',
+            95 => 'Gewitter',
+            96 => 'Gewitter mit leichtem Hagel',
+            99 => 'Gewitter mit starkem Hagel'
+        ];
+
+        return $descriptions[$code] ?? 'Unbekannt';
+    }
+
+    /**
+     * Wandelt WMO Weather Code in Icon-Code um (OpenWeatherMap kompatibel)
+     */
+    private function getWeatherIcon($code) {
+        if ($code == 0) return '01d'; // Klar
+        if ($code >= 1 && $code <= 2) return '02d'; // Teilweise bewölkt
+        if ($code == 3) return '04d'; // Bewölkt
+        if ($code >= 45 && $code <= 48) return '50d'; // Nebel
+        if ($code >= 51 && $code <= 55) return '09d'; // Nieselregen
+        if ($code >= 61 && $code <= 65) return '10d'; // Regen
+        if ($code >= 71 && $code <= 77) return '13d'; // Schnee
+        if ($code >= 80 && $code <= 82) return '09d'; // Regenschauer
+        if ($code >= 85 && $code <= 86) return '13d'; // Schneeschauer
+        if ($code >= 95 && $code <= 99) return '11d'; // Gewitter
+
+        return '01d'; // Default
+    }
+
     /**
      * Wandelt Windrichtung (Grad) in Kompassrichtung um
      */
diff --git a/aurora-livecam/index.php b/aurora-livecam/index.php
index c8f200d..db0e914 100644
--- a/aurora-livecam/index.php
+++ b/aurora-livecam/index.php
@@ -1271,7 +1271,7 @@ class AdminManager {
 
         // Weather Settings
         $output .= '<div class="settings-group">';
-        $output .= '<h4>🌤️ Wetter-Widget</h4>';
+        $output .= '<h4>🌤️ Wetter-Widget <span style="font-size:12px; color:#4CAF50;">(Open-Meteo - 100% kostenlos!)</span></h4>';
 
         $output .= '<div class="setting-row">';
         $output .= '<span class="setting-label">Wetter-Widget anzeigen</span>';
@@ -1283,13 +1283,6 @@ class AdminManager {
         $output .= '</div>';
         $output .= '</div>';
 
-        $output .= '<div class="setting-row">';
-        $output .= '<span class="setting-label">OpenWeatherMap API Key <a href="https://openweathermap.org/api" target="_blank" style="font-size:11px;">(kostenlos registrieren)</a></span>';
-        $output .= '<div class="setting-input">';
-        $output .= '<input type="text" id="setting-weather-api-key" class="text-input" placeholder="Dein API Key hier einfügen..." value="' . htmlspecialchars($settingsManager->get('weather.api_key')) . '">';
-        $output .= '</div>';
-        $output .= '</div>';
-
         $output .= '<div class="setting-row">';
         $output .= '<span class="setting-label">Standort (Stadt,Land)</span>';
         $output .= '<div class="setting-input">';
@@ -3581,10 +3574,6 @@ const AdminSettings = {
             this.updateSetting('weather.enabled', e.target.checked);
         });
 
-        document.getElementById('setting-weather-api-key')?.addEventListener('change', (e) => {
-            this.updateSetting('weather.api_key', e.target.value);
-        });
-
         document.getElementById('setting-weather-location')?.addEventListener('change', (e) => {
             this.updateSetting('weather.location', e.target.value);
         });