September Honeymoon ideas!

Pretty much any tropical location has excursions you can do. Riviera Maya in Mexico is nice, and you can check out the Mayan ruins and cenotes and stuff. Excellence brand hotels are fantastic adults only luxury resorts, and they have 2 in the area: Playa Mujeres and Riviera Cancun. Aruba is also gorgeous and there's the natural bridge, the old fort, and a really cool national park.

RIU Montego Bay in Jamaica is a great time.

Exumas, Greece islands, Maldives, anywhere in the French Polynesia. Not many people go to Seychelles, but it is one of the most beautiful places I have visited and I always recommend it to friends.

We went to Sandals St. Lucia for our honeymoon and it was fantastic!! All inclusive, we did super fun excursions and it was well worth all the money- highly recommend any of the Sandals resorts!!

All the above are great, just make sure you get trip insurance. September is prime hurricane month, and people are already expecting a strong hurricane season! I would suggest Hawaii, since, though also in hurricane season, it is very unlikely of a hurricane.