Water not hot enough

[purpleme12]

The water isn't hot enough to have a bath it's (fairly) warm but nowhere near hot enough to have a bath in and keep you warm. I know it's because of the cold cos it's not like this when it's warmer.
But my question is.
Is this normal?
Does this happen to everyone else's?

Run the bath really slowly. I feel your pain!

Combi boilers are designed to raise the temperature of the incoming supply by 35 degrees before delivering water to the hot tap. This will be at the flow rate specified by the manufacturer.

this means as other posters have suggested that with the cold weather the lower temperature on the incoming mains water will impact the temperature at the hot tap.

It looks like you have either a baxi duotec or the potterton equivalent. Assuming it’s a 24 kw boiler that should give you 9 litres per minute at that temperature rise. If you slow the tap down you will get hotter water and by Sunday it will have warmed up a bit

If you aren't heating your house and the pipes aren't lagged(insulated) inside the house then that will also make the water get cold on its way to the bath. It's a cheap job to lag the pipes but messy as will involve taking floor boards up to get to them. A competent handy person should be able to sort it out for you.

If you have a combi boiler, then, yes, it is normal.

Let's suppose you have a combi boiler that is capable of heating 13.3 litres of water per minute,
by 30 degrees.

It is only capable of heating 10 litres of water by 35 degrees.

The colder the incoming supply, the less hot the tap water will be.

You can maximise the temperature
by reducing the flow.

This is one of the reasons I am not keen on combis

You can change the temp , it involves getting behind the taps but it's possible .. dh turned ours up when we bought this house

Sounds like you have a blender valve. I don't think the OP does.

Thank you for everyone's comments.
I really appreciate it