The canaries are lovely. I 'discovered ' them just three years ago and september will be my 11 th visit.
It does get hot but there's a cooling breeze but do be careful as it is so easy to get burnt.
Where are you staying? Tenerife? Las Americas? Adeje? I know Los Cris and las Americas pretty well if you want any more specifics.
You will love it.
There's no need to panic. The island is a very chilled out place to go . The people are lovely and really make us feel welcome.
You do get pestered by the Lookee Lookee men ( street sellers) and the hair braiders, but usually a firm 'no' is all that's needed.
In las Americas the hospiten, hospital is just up from the vulcano hotel and along the road el camison, there is a doctors clinic that appears to open pretty late.
If it is tenerife and las americas there are lots of shops. The beach shops right up to ones selling high end products like €600 for shoes so you might want to bring spare cash for shopping. Booze, you can bring a litre of spirit home with you. Soberano brandy for eg is €9 or there abouts for a litre.
Anyone still smoke? faggies are cheap too.
You can get all your beauty products here. The Spanish are very beauty conscious. If you are staying at a hotel with a spa, you might want to treat yourself to a pamper treatment. Some of the big hotels have hairdressers etc
You should also find the hotels to be very clean as a general rule and I have no problem with using the water in las Americas.
The great thing is, you are still in the uk time zone and just 4 to 4.5 hours away.
We go in winter and autumn just to shorten our English winter.
You will love it.