Ritidian Point, Guam: vitamin D, best months and travel guide
Wildlife refuge with a quiet white beach. Best for: nature lovers, couples.
Ritidian Point gives little vitamin D from the sun in any month for skin type III at age 30. Rainy or stormy all year.
Ritidian Point month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Bad weather | 7.2 h | 6.9 | 8 min | 29°C | 21/30 |
| February | Bad weather | 7.8 h | 8.1 | 7 min | 28°C | 18/30 |
| March | Bad weather | 8.4 h | 9.0 | 6 min | 29°C | 19/30 |
| April | Bad weather | 8.8 h | 9.2 | 6 min | 30°C | 26/30 |
| May | Bad weather | 8.9 h | 8.9 | 6 min | 30°C | 25/30 |
| June | Bad weather | 9.0 h | 8.8 | 6 min | 31°C | 22/30 |
| July | Bad weather | 8.8 h | 8.5 | 6 min | 30°C | 28/30 |
| August | Bad weather | 7.9 h | 8.2 | 7 min | 30°C | 27/30 |
| September | Bad weather | 7.0 h | 7.8 | 7 min | 30°C | 29/30 |
| October | Bad weather | 7.0 h | 7.6 | 7 min | 29°C | 29/30 |
| November | Bad weather | 7.2 h | 7.1 | 8 min | 30°C | 26/30 |
| December | Bad weather | 7.2 h | 6.9 | 8 min | 31°C | 21/30 |
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 Ritidian Point
Wildlife refuge with a quiet white beach. Warm all year, a drier season from January to May and typhoon risk from June to November. Shopping and beach resorts cluster in Tumon.
In Ritidian Point afternoon highs average from 28°C in February to 31°C in December. The wettest month is September (about 29 rainy days out of 30) and the driest is February (18). Midday UV peaks at 9.2 in April, which is very strong, so protect your skin.
Questions about Ritidian Point
When is the best time to visit Ritidian Point for vitamin D?
Ritidian Point gives little vitamin D from the sun in any month for skin type III at age 30.
What is the weather like in Ritidian Point?
Afternoon highs average from 28°C in February to 31°C in December. The wettest month is September, with about 29 rainy days out of 30.
Which months should I avoid in Ritidian Point?
For a beach stay, avoid the months when it is rainy or stormy all year.