Vitamin D in Saint Martin in December: sun, UV and what to expect

Good Good. A full dose takes about 9 minutes at midday, and the usable window is about 6.8 hours a day.

6.8 hsun window (UV 2.5+)

6.2peak UV Index

9 minto a full dose

27°Cafternoon high

9/30rainy days

30/30sunny days

Best places in Saint Martin in December: Pic Paradis (good), Marigot (good), Grand Case (good), Orient Bay (good), Anse Marcel (good).

Open Saint Martin for December on the map Find stays in Saint Martin

How long in the sun in December?

Plan your sun session around midday (roughly 11:00 to 15:00), when the UV Index peaks at about 6.2. With about a quarter of your skin bare, a full dose takes around 9 minutes for skin type III at age 30, and about 16 minutes at age 65.
Stop well before your skin turns pink. At this UV level skin type III can start to burn after about 32 minutes of midday sun, so cover up, find shade and use SPF 30+ on skin that stays out.
Water, sand and light surfaces reflect UV, so at the beach you get a little more sun than the number suggests, for the good and the bad.

Skin type	Full dose, age 30	Full dose, age 65	Time to burn
Type I	6 min	11 min	22 min
Type II	7 min	13 min	27 min
Type III	9 min	16 min	32 min
Type IV	13 min	24 min	48 min
Type V	17 min	32 min	65 min
Type VI	29 min	54 min	1.8 h

Minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, at Grand Case, the median coastal place. Time to burn is the time to reach one minimal erythemal dose and does not depend on age. A rough planning guide, not medical advice.

Places in Saint Martin in December

Place	Rating	Sun window	Full dose	Afternoon high	Rainy days
Pic Paradis	Good	6.8 h	8 min	27°C	9/30
Marigot	Good	6.8 h	9 min	27°C	9/30
Grand Case	Good	6.8 h	9 min	27°C	9/30
Orient Bay	Good	6.8 h	9 min	27°C	9/30
Anse Marcel	Good	6.8 h	9 min	27°C	9/30

Other months in Saint Martin

Best months: October to July. Full Saint Martin guide

Other sunny places in December

All best places for vitamin D in December