Will this ripen before winter

Just looked at my sunniest one and it has 10 fruit on that are now half red half white. I think not totally ripe but i tried one and it had a flavour of a mix of pine needles and strawberries, some sweetness and low acid. The seeds are a bit bitter and peppery but not awful. Quite pleasant if you dont mind piney flavours, hopefully it gets sweeter.

 

I picked my few peregrine peaches a couple of weeks ago, my Indian red peaches are still no where near ready.
There is often some variation between varieties of the same plant regarding when they ripen.

 

It depends where you are @hi2u_uk . I very much doubt that plant [Ugni] would survive where I live. This is why it's very important to know where you are for giving suitable advice. It's also why you need to do sufficient research before buying anything new.
Temps of minus 5, [and lower] as mentioned by another poster, is a pretty regular occurrence in winter here where I am, even in these increasingly mild winters, but that mildness also means even more rain, therefore it's wet cold- which is worse.
I'd need to grow it indoors - ie a greenhouse [probably heated] or a conservatory or similar. The growing season isn't long enough here either, and that's also a problem with fruiting plants.

 

Oh Interesting im thinking about whether to pick my peaches that are on the tree as I think it is getting colder and wetter

 

I just give them a gentle pull each day, when ripe they should come away easily, maybe a gentle twist but nothing strong.
They will feel soft and should smell.
There is no rush, yet,unless the gales blow them off.

 

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so the rain wont make them bad ? assuming they are good

 

No, the biggest problems are birds I find, they peck them just before they are ripe, as they do with lots of fruit.
You do have a very short window to pick them, as they can be not really ready one day, ready the next and getting over ripe or falling off the next.