Costa Cruises · 4 nights
Costa Diadema weather: 4-night cruise from Itajaí, December 12, 2026
The Costa Diadema (Costa Cruises) leaves Itajaí on December 12, 2026 for a 4-night cruise, with stops in Santos (Sao Paulo) and Ilhabela. It returns to Itajaí on December 16, 2026. Typical afternoon highs along the route run from 82°F to 87°F (28°C to 30°C), and 1 day is at sea, where seas are typically slight (around 4 ft).
Open the interactive forecast for this sailing
This page shows typical conditions for these dates. The interactive forecast adds a live day-by-day forecast, wave heights and weather alerts as the sailing gets closer.
Day-by-day itinerary and typical weather
| Day | Port | High / low | Rain days | Wind | Typical seas |
|---|---|---|---|---|---|
| Day 1Sat, Dec 12 | Itajaí Embark | 83 / 69°F28 / 20°C | 39% | 11 mph17 km/h | – |
| Day 2Sun, Dec 13 | Santos (Sao Paulo) | 82 / 71°F28 / 21°C | 51% | 9 mph15 km/h | – |
| Day 3Mon, Dec 14 | Ilhabela | 85 / 71°F30 / 21°C | 48% | 7 mph12 km/h | – |
| Day 4Tue, Dec 15 | At sea | 84 / 70°F29 / 21°C | 44% | 7 mph11 km/h | 4 ft (1.2 m)Slight; rougher days up to 6 ft |
| Day 5Wed, Dec 16 | Itajaí Disembark | 87 / 72°F30 / 22°C | 46% | 10 mph16 km/h | – |
Seas are significant wave height, the average of the highest third of waves. What that means on board.
Ports on this cruise
More Costa Diadema sailings
- December 16, 2026: 3 nights from Itajaí
- December 19, 2026: 7 nights from Itajaí
- December 26, 2026: 7 nights from Itajaí
- January 2, 2027: 7 nights from Itajaí
- January 9, 2027: 7 nights from Itajaí
- January 16, 2027: 7 nights from Itajaí