7-Night Cruise on Marella DiscoveryTropical Isles - Weather

Departing La Romana, Dominican Republic on December 29, 2026, the Marella Cruises ship Marella Discovery runs this 7-night Tropical Isles sailing. It's a classic Caribbean cruise. Travelers sailing in December can generally expect warm, sunny weather with gentle trade winds. Ports of call include La Romana, Dominican Republic, San Juan, Puerto Rico, St Thomas, US Virgin Islands, with 4 more along the way. Scroll the daily outlook below to pack smart for every port of call.

1. Day 1 — Tuesday, Dec 29, 2026 — La Romana, Dominican Republic

   La Romana, Dominican Republic is a scheduled port of call on day 1 of the 7-night Tropical Isles cruise on Marella Discovery. Expected weather: partially cloudy with highs near 82°F.

2. Day 2 — Wednesday, Dec 30, 2026 — At Sea

   Day 2 of 8 is a day at sea aboard Marella Discovery, cruising between ports on the Tropical Isles itinerary.

3. Day 3 — Thursday, Dec 31, 2026 — San Juan, Puerto Rico

   San Juan, Puerto Rico is a scheduled port of call on day 3 of the 7-night Tropical Isles cruise on Marella Discovery. Expected weather: partially cloudy with highs near 80°F.

4. Day 4 — Friday, Jan 1, 2027 — St Thomas, US Virgin Islands

   St Thomas, US Virgin Islands is a scheduled port of call on day 4 of the 7-night Tropical Isles cruise on Marella Discovery. Expected weather: partially cloudy with highs near 78°F.

5. Day 5 — Saturday, Jan 2, 2027 — St Croix, US Virgin Islands

   St Croix, US Virgin Islands is a scheduled port of call on day 5 of the 7-night Tropical Isles cruise on Marella Discovery. Expected weather: partially cloudy with highs near 78°F.

6. Day 6 — Sunday, Jan 3, 2027 — Ponce, Puerto Rico

   Ponce, Puerto Rico is a scheduled port of call on day 6 of the 7-night Tropical Isles cruise on Marella Discovery. Expected weather: partially cloudy with highs near 80°F.

7. Day 7 — Monday, Jan 4, 2027 — Catalina Island, Dominican Republic

   Catalina Island, Dominican Republic is a scheduled port of call on day 7 of the 7-night Tropical Isles cruise on Marella Discovery. Expected weather: partially cloudy with highs near 79°F.

8. Day 8 — Tuesday, Jan 5, 2027 — La Romana, Dominican Republic

   La Romana, Dominican Republic is a scheduled port of call on day 8 of the 7-night Tropical Isles cruise on Marella Discovery. Expected weather: partially cloudy with highs near 82°F.