Tortola, British Virgin Islands: vitamin D, best months and travel guide
Largest island and the sailing base, with beaches and hills. Best for: sailors, couples.
The best months for vitamin D in Tortola are October to July, when a full dose takes about 6 minutes at midday. Rainy or stormy from August to September.
Tortola month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Excellent | 7.1 h | 6.7 | 8 min | 26°C | 12/30 |
| February | Excellent | 7.4 h | 7.5 | 7 min | 26°C | 15/30 |
| March | Excellent | 8.4 h | 8.7 | 6 min | 26°C | 5/30 |
| April | Excellent | 8.7 h | 8.9 | 6 min | 27°C | 13/30 |
| May | Excellent | 9.0 h | 8.9 | 6 min | 28°C | 15/30 |
| June | Excellent | 8.9 h | 8.8 | 6 min | 29°C | 15/30 |
| July | Excellent | 8.8 h | 8.6 | 6 min | 29°C | 15/30 |
| August | Bad weather | 8.5 h | 8.8 | 6 min | 29°C | 16/30 |
| September | Bad weather | 8.5 h | 8.6 | 6 min | 30°C | 15/30 |
| October | Excellent | 7.4 h | 7.4 | 7 min | 29°C | 15/30 |
| November | Good | 6.6 h | 6.3 | 8 min | 28°C | 15/30 |
| December | Good | 6.8 h | 6.2 | 9 min | 27°C | 10/30 |
Sun window is the number of hours a day with UV Index 2.5 or higher. Full dose is the minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, for skin type III. Rainy days are days with at least 1 mm out of 30.
What to expect in Tortola
Largest island and the sailing base, with beaches and hills. A dry, breezy season from December to April and hurricane risk from June to November. Many visitors charter a boat. Prices are high and facilities are simple.
In Tortola afternoon highs average from 26°C in February to 30°C in September. The wettest month is August (about 16 rainy days out of 30) and the driest is March (5). Midday UV peaks at 8.9 in April, which is very strong, so protect your skin.
More about British Virgin Islands · British Virgin Islands in March · Best places in March
Questions about Tortola
When is the best time to visit Tortola for vitamin D?
The best months for vitamin D in Tortola are October to July, when a full dose takes about 6 minutes at midday.
What is the weather like in Tortola?
Afternoon highs average from 26°C in February to 30°C in September. The wettest month is August, with about 16 rainy days out of 30.
Which months should I avoid in Tortola?
For a beach stay, avoid the months when it is rainy or stormy from August to September.