I believe it is completely dependent on the breed...
I have always had gun dogs (which obv a springer is) and they seem perfectly happy whatever the weather...
Infact my flat coat would rather be in n out of the water and wet all day as then she would not get too hot.
What sort of length is your springers coat? (the natural one tht she was born with...)
As long as she is constantly moving i would of thought she'd be fine, if u are intending on camping then a fleece / blanket for her to sleep on and to pull over her like a bed would keep her comfy enough.
It's really short haired dogs that needs coats, gundog breeds have been bred to be outside no matter what the weather...
To respond to Cumbrian, my dog is water obsessed, she is always in the sea and rivers any chance she gets but if we are on our yacht and off shore she always has a lifejacket on... if she went over board in a wave I doubt she would be able to keep 'doggy paddling' offshore for too long through the swells and rolling waves. So i just wont risk it, she may look a bit silly to ppl but if it keeps her alive its worth it.
Badger one thing i would say is 7 months is still quite young and at that age you should still restrict the amount of exercise your springer has. Non-stop exercise all day could damage her hips as they are still forming...
Have fun though
J