You can take a travel kettle and it is 3 pin sockets. use room service to bring the jug of hot water etc., transfer to kettle, boil and enjoy the cuppa whenever you want.
They have a saying in Boston "If you don't like the weather...wait a minute" which basically sums up the weather for the whole of that area. The earlier in September the better the weather and it can be hot but unfortunately it can also be cold and sometimes wet. so take layers and you will not go wrong as you can strip right down accordingly. Secondly ... you're on holiday, use room service and pamper yourself .. Neil