Its very difficult to advise re this topic, the weather is definately changeable at the moment and I am still wearing jackets at night,and showers are forecast next week but they dont always happen Today was 25c on my thermometer in the shade in my garden, pleasant but not too hot, I would advise summer clothes with 1 jacket and long trousers in case cool at night, you can travel in those Hope you have a good journey and enjoy your holiday! I am a little jealous that because I live here now I dont have a better holiday to look forward to!