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Hotels in Grassy Key

Choose from 2196 Grassy Key Hotel Deals

Rainbow Bend Resort

Rainbow Bend Resort

2.5 out of 5
57784 Overseas Hwy Marathon FL
  • 22 min walk from Dolphin Research Center
Book a stay at this beach hotel in Marathon. Enjoy a private beach, daily housekeeping, and a garden. Our guests praise the breakfast and the helpful staff in ...
8.2/10 Very Good! (899 reviews)
We enjoyed our visit here. The best part was the lounge chairs - as they had arm rests. The pool was enjoyable. The rooms were sufficient - although we could hear someone snoring from another room. The bathroom was remodeled and

Reviewed on Mar 30, 2026

Rainbow Bend Resort
Grassy Flats Resort & Beach Club

Grassy Flats Resort & Beach Club

4 out of 5
58182 Overseas Hwy Marathon FL
  • 14 min walk from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and 2 outdoor pools. Our guests praise the helpful staff and the property condition in our reviews. ...
9.4/10 Exceptional! (421 reviews)
The pool and pool area was nice. We liked how there was a separate adult pool from the kids pool. Also, the room was clean and had clean towels everyday. But, they allow dogs which was not a pleasant experience. Yipey dogs during the day & night was very disturbing and annoying.

Reviewed on Mar 26, 2026

Grassy Flats Resort & Beach Club
Gulf View Waterfront Resort

Gulf View Waterfront Resort

2.5 out of 5
58743 OVERSEAS HWY Marathon FL
  • 4 min walk from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and daily housekeeping. Our guests praise the helpful staff and the clean rooms in our reviews. ...
8.4/10 Very Good! (562 reviews)
It is a cute little place to stay. We enjoyed the pool, outdoor games and relaxed on the little beach area

Reviewed on Mar 19, 2026

Gulf View Waterfront Resort
Isla Bella Beach Resort & Spa

Isla Bella Beach Resort & Spa

5 out of 5
1 Knights Key Boulevard Marathon FL
  • 29 min drive from Dolphin Research Center
Book a stay at this luxury hotel in Marathon. Enjoy free WiFi, 5 outdoor pools, and a full-service spa. Our guests praise the pool and the helpful staff in our ...
9.2/10 Wonderful! (1,113 reviews)
Beautiful property and staff that goes out of their way to provide an amazing experience. Don’t expect a swimming beach, but plenty of room for chairs by the water or the multiple pools. Shanda at the sushi bar went above and beyond to accommodate our group and the sushi was delicious. Mahina was ...

Reviewed on Mar 28, 2026

Isla Bella Beach Resort & Spa
Hawks Cay Resort

Hawks Cay Resort

4 out of 5
61 Hawks Cay Blvd Marathon FL
  • 6 min drive from Dolphin Research Center
Book a stay at this luxury hotel in Marathon. Enjoy free WiFi, 5 outdoor pools, and a full-service spa. Our guests praise the pool and the helpful staff in our ...
8/10 Very Good! (1,010 reviews)
They dont strive to serve. Our room had a sliding bathroom door that did not lock or remain closed. It took them 3 days to fix it. The last day, the entire floor smelled fish. They sprayed copious amounts of air freshener but it didnt help. Overall, its a nice place with great views and amenities ...

Reviewed on Mar 31, 2026

Hawks Cay Resort
Lime Tree Bay Resort

Lime Tree Bay Resort

3.5 out of 5
68500 Overseas Hwy Long Key FL
  • 23 min drive from Dolphin Research Center
Book a stay at this beach resort in Long Key. Enjoy free WiFi, free parking, and 3 outdoor pools. Our guests praise the pool and the helpful staff in our reviews. ...
9.2/10 Wonderful! (1,211 reviews)
The room was spacious and had a feather bed that was almost too soft. A/C was good, and we really liked having a ceiling fan too. Shower was huge! But not a shelf or place to put a bar of soap or hang a washcloth. The laminate floors were very dirty, which we didn't notice until after taking showers ...

Reviewed on Mar 30, 2026

Lime Tree Bay Resort
Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys

Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys

3 out of 5
2146 Overseas Hwy Marathon FL
  • 26 min drive from Dolphin Research Center
Book a stay at this beach hotel in Marathon. Enjoy free WiFi, 2 outdoor pools, and a beach locale. Our guests praise the pool and the helpful staff in our reviews. ...
9/10 Wonderful! (1,003 reviews)
My best experience there was the pool area. The rooms were not that great for the price I paid. The carpet seemed dirty and the AC did not work well. The staff was excellent. I was on a family vacation, hoping to get my kids off my back for a few hours;however, they had a game room many of the amenities ...

Reviewed on Mar 23, 2026

Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys
Kingsail Resort

Kingsail Resort

2 out of 5
7050 Overseas Highway Marathon FL
  • 20 min drive from Dolphin Research Center
Stay at this motel in Marathon. Enjoy free WiFi, free parking, and a marina. Our guests praise the helpful staff and the clean rooms in our reviews. Popular ...
8.6/10 Excellent! (1,032 reviews)
My review is against Charlotte the “manager” I brought up the pet fee as it’s specified on the website as per stay per night but, I was charge per dog. She mention changing the verbiage & adjusting the fee. However, she charge me the full amount. She didn’t provided a receipt. Just un-trust worthy. ...

Reviewed on Mar 30, 2026

Kingsail Resort
Fairfield Inn & Suites by Marriott Marathon Florida Keys

Fairfield Inn & Suites by Marriott Marathon Florida Keys

3 out of 5
13201 Overseas Hwy Marathon FL
  • 13 min drive from Dolphin Research Center
Book a stay at this business-friendly hotel in Marathon. Enjoy free breakfast, free WiFi, and 2 outdoor pools. Our guests praise the breakfast and the restaurant ...
9.2/10 Wonderful! (1,106 reviews)
Clean, friendly staff, nice pool and great breakfast with plenty of options. Fitness center was fantastic the one day of our trip we were able to use it before they closed it for renovations. On-site restaurant had a good selection of food and drinks and had live music every night.

Reviewed on Mar 29, 2026

Fairfield Inn & Suites by Marriott Marathon Florida Keys
Tranquility Bay Beachfront Hotel and Resort

Tranquility Bay Beachfront Hotel and Resort

4 out of 5
2600 Overseas Hwy Marathon FL
  • 26 min drive from Dolphin Research Center
Book a stay at this beach hotel in Marathon. Enjoy free WiFi, free parking, and 3 outdoor pools. Our guests praise the pool and the helpful staff in our reviews. ...
8.8/10 Excellent! (1,005 reviews)
Excellent

Reviewed on Mar 29, 2026

Tranquility Bay Beachfront Hotel and Resort
Coconut Cay Resort & Marina

Coconut Cay Resort & Marina

3 out of 5
7196 Overseas Highway Marathon FL
  • 20 min drive from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and a marina. Our guests praise the helpful staff and the clean rooms in our reviews. Popular ...
8.4/10 Very Good! (1,031 reviews)
A charming but dated hotel. It is physically clean and well kept but our room has musty and old lingering smell, overpowering especially upon entering the room. Location is very good, walkable to some restaurants, close to groceries and beach.

Reviewed on Mar 29, 2026

Coconut Cay Resort & Marina
Floating Sea Cove Resort & Marina

Floating Sea Cove Resort & Marina

2 out of 5
12685 Overseas Highway Marathon FL
  • 12 min drive from Dolphin Research Center
Stay at this hotel in Marathon. Enjoy free parking and air conditioning. Our guests praise the helpful staff and the clean rooms in our reviews. Popular attractions ...
5/10 (1,003 reviews)
Great place to get into, fit a full size truck to park and had room to park a boat also if i would've brought mine. Friendly staff, clean rooms ac worked as it should. No pool but who needs a pool when you're that close to the ocean and in paradise. Very relaxed and private atmosphere

Reviewed on Mar 30, 2026

Floating Sea Cove Resort & Marina
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

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