Hi, Freescale's i.mx515 processor is certified for ambient temperatures that you are highly unlikely to experience at a beach in Spain. Even with a plastic bag, you should be fine.
To get a general idea about the temperatures inside your computer, you can check how hot your battery is. Just open a terminal and type:
Code:
cat /sys/devices/platform/imx-i2c.1/i2c-adapter/i2c-1/1-000b/power_supply/battery/temp
If you divide the shown value by ten, you will get the temperature of your battery in Celsius.