Looks okay. I bet the spots are from 1) some kind of mechanical damage like a pine needle wounding the leaf and 2) some kind of fungus/bacteria that is taking advantage of the initial wound. If over half of the leaf surface looked bad then you might have a problem. You could spray for fungus in the future and set up some kind of screening to keep falling debris from injuring the leaves. Or just let nature do what it does best...

Leaf spot like that is pretty common late in the season on Hydrangeas. As Luis pointed out it's usually caused by some sort of fungus growing due to hot, moist conditions. For small amounts like in your photo I would not worry too much. It's mostly just a cosmetic problem. And as pointed out there are some clean-up steps and proper watering you can do to help avoid the problem in the future.

For more info try Googling "hydrangea leaf spots" and you'll find a lot of info.

It is approaching the end of the growing season. It is normal for leaves on many, many plants- herbaceous an woodies- to have spots, be partially eaten, torn whatever. I'd bet a hundred bucks if you walk all around your garden and look at all the plants there's hardly a one that doesn't show the effect of a long hot summer.....or even a normal one. I would not go to the expense or time to spray for something like this. As others say, remove the ones that annoy you and turn your attention somewhere else.

Thanks, everyone! So nice to know I don't need to worry about this one!

Emily,

You are good to go. Go have a cup of coffee or your favorite beverage and think of other things that put you at ease because your hydrangea is just nearing its end of the season ritual - maybe think/dream of new hydrangeas for next year.