Hi firefly333,
At night it's gotten as cool as the upper-50s, but if you're outside it can feel cooler than that with a strong breeze or wind. I only brought short sleeves, a fleece hoodie, and a light jacket, and anytime I've been cool I just throw the fleece hoodie over my shirt and I've been OK. I think our cruise has been a bit cooler because the Captain took a more northerly route. When I did the Symphony transatlantic last year - which was a few weeks prior to this one - the Captain stuck to a more southerly route and I remember it being much warmer.
It does get windy on the pool deck depending on what way the ship's going and what way the wind is blowing. Sometimes it's pretty calm, but on the first day or two, there was quite a strong breeze. It's not so bad when the sun is out.
The Azores wasn't a planned stop and we didn't dock there (Oasis is too large to dock there) - we diverted that way due to a medical emergency and sat offshore while the lifeboat transported an injured passenger ashore.