Grytviken UV Index

Grytviken, South Georgia and the South Sandwich Islands experiences significant seasonal variation in UV radiation at latitude 54.3°S. The UV index ranges from 2 in May to 8 in January, with an annual average of 4.7. This variation follows the pattern typical of mid-latitude cities.

The highest UV levels in Grytviken occur in January, when the UV index reaches 8 (very high). During this period, unprotected skin can burn in as little as 15-20 minutes during peak hours (11am to 3pm). SPF 50+ sunscreen, protective clothing, and seeking shade are strongly recommended.

The lowest UV levels occur in May, with an average UV index of 2 (low). During this period, the risk of sunburn is minimal for most skin types, though some UV exposure still occurs.

The World Health Organization recommends sun protection measures when the UV index is 3 or above. In Grytviken, the UV index exceeds this threshold for 9 months of the year. For 2 months, the UV index reaches "very high" or "extreme" levels, requiring extra precautions.