Best time to cruise · Shoulder season
Caribbean cruises in August
The busiest part of hurricane season starts in August, and itineraries change most often from now through October, usually a swapped or skipped port rather than anything dramatic. Once US schools go back in mid to late August, demand and fares drop sharply. Buy travel insurance, keep shore plans loose, and favor Southern Caribbean routes or short trips that are easy to rebook.
- Shoulder season
- Avg high 85°F
- 13 hrs daylight
Photo: Clavius66, CC BY-SA 3.0, via Wikimedia Commons
Caribbean in August: Shoulder season
The busiest part of hurricane season starts in August, and itineraries change most often from now through October, usually a swapped or skipped port rather than anything dramatic. Once US schools go back in mid to late August, demand and fares drop sharply. Buy travel insurance, keep shore plans loose, and favor Southern Caribbean routes or short trips that are easy to rebook.
Across Caribbean cruise ports, August brings average highs around 85°F (30°C) and lows near 83°F, with about 3.7 inches of rain over the month and roughly 13 hours of daylight.
- Verdict
- Shoulder season
- Season
- Year-round; driest and busiest December to April. Hurricane season June 1 to November 30, most active August to October.
- Average high / low
- 85°F / 83°F
- Rainfall (month)
- 3.7 in
- Daylight
- About 13 hours
- Typical cruise length
- 4 to 7 nights; 8 to 12 nights for most Southern Caribbean routes from Florida
What to pack: light, breathable clothes, swimwear, a sun hat, sunglasses and reef-safe sunscreen, plus a light layer for air-conditioned rooms.
How August compares with the rest of the year
- Jan: Best time to go
- Feb: Best time to go
- Mar: Best time to go
- Apr: Best time to go
- May: Good time to go
- Jun: Good time to go
- Jul: Good time to go
- Aug: Shoulder season
- Sep: Shoulder season
- Oct: Shoulder season
- Nov: Good time to go
- Dec: Best time to go
- No regular sailings
- Shoulder season
- Good time to go
- Best time to go
Caribbean weather in August
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F (°C) | 8027 | 8027 | 8127 | 8228 | 8329 | 8429 | 8529 | 8530 | 8630 | 8529 | 8328 | 8228 |
| Low °F (°C) | 7725 | 7725 | 7825 | 7926 | 8127 | 8228 | 8228 | 8328 | 8328 | 8228 | 8127 | 7926 |
| Rain in (mm) | 2.154 | 1.334 | 1.334 | 1.435 | 2.460 | 4.0101 | 3.179 | 3.793 | 4.1104 | 5.6143 | 5.3136 | 2.769 |
| Daylight (hrs) | 11 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 11 | 11 |
August weather port by port
| Port | Avg high | Avg low | Rain | Daylight |
|---|---|---|---|---|
| Cozumel | 86°F | 82°F | 5.6 in | 13 h |
| St. Thomas | 85°F | 83°F | 3.3 in | 13 h |
| St. Maarten | 85°F | 83°F | 2.3 in | 13 h |
| Grand Cayman | 86°F | 84°F | 3.6 in | 13 h |
| Roatán | 85°F | 83°F | 7.5 in | 13 h |
| Costa Maya | 86°F | 83°F | 5.4 in | 13 h |
| San Juan | 88°F | 81°F | 4.9 in | 13 h |
| Aruba | 85°F | 82°F | 1.1 in | 13 h |
| Curaçao | 84°F | 83°F | 0.8 in | 13 h |
| Barbados | 84°F | 82°F | 2.8 in | 13 h |
| St. Lucia | 85°F | 83°F | 2.7 in | 13 h |
| Perfect Day at CocoCay | 86°F | 84°F | 3.9 in | 13 h |
Average daily highs and lows, 2015–2024, from NASA POWER, adjusted to sea level. Rain is the average monthly total.
Other great cruise destinations in August
Caribbean in August: FAQs
Is August a good time to cruise Caribbean?
It can be, as a shoulder-season month. The busiest part of hurricane season starts in August, and itineraries change most often from now through October, usually a swapped or skipped port rather than anything dramatic. Once US schools go back in mid to late August, demand and fares drop sharply. Buy travel insurance, keep shore plans loose, and favor Southern Caribbean routes or short trips that are easy to rebook.
What is the weather like on a Caribbean cruise in August?
Across Caribbean cruise ports, August brings average highs around 85°F (30°C) and lows near 83°F, with about 3.7 inches of rain over the month and roughly 13 hours of daylight. Conditions vary from port to port and day to day.
What should I pack for a Caribbean cruise in August?
Pack light, breathable clothes, swimwear, a sun hat, sunglasses and reef-safe sunscreen, plus a light layer for air-conditioned rooms. Check your cruise line's dress code for evenings.
When is the best time to cruise Caribbean?
Year-round; driest and busiest December to April. Hurricane season June 1 to November 30, most active August to October.. The best months are usually January, February, March, April, December.
Where else can I cruise in August?
August is also a top month for Alaska, Canada & New England, Northern Europe, Norwegian Fjords, Baltic Sea.
Updated November 2026 by the BookMyDreamCruise editorial team. How we research and fact-check.
Sources: NASA POWER climate data.