March weather forecast
Saint Helena Island, Saint Helena, Ascension and Tristan da Cunha

As March approaches, the warmth persists and reaches its peak, resulting in the highest average temperature for the year. Walking tours during daylight hours can be a pleasure, as the hours of sunshine increase during the month. Despite the tropical rainfall patterns, days without precipitation are quite common. With a higher likelihood of rainfall in March, which is expected to peak at 90mm (3.54"), many flora species bloom into vibrant colors. March then, presents the optimal opportunity for photography and gardening enthusiasts.

Temperature

Saint Helena Island experiences peak temperatures, averaging a high-temperature of 23°C (73.4°F) during February and March.

Rainfall

March is the month with the most rainfall in Saint Helena Island. Rain falls for 15 days and accumulates 90mm (3.54") of precipitation.

Sea temperature

February through April, with an average sea temperature of 25°C (77°F), are months with the warmest seawater.
Note: Water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm, making water activities enjoyable for prolonged periods without any uncomfortable sensations.

Daylight

The average length of the day in March in Saint Helena Island is 12h and 11min.
On the first day of the month, sunrise is at 06:23 and sunset at 18:46. On the last day of March, sunrise is at 06:28 and sunset at 18:25 GMT.

Sunshine

The average sunshine in March in Saint Helena Island is 15h.

UV index

The months with the highest UV index are January through March, October through December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 12 during March translates into the following guidance:
Adopt all important safety measures, unprotected skin may burn rapidly. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. A sunscreen boasting a minimum SPF of 30 should be generously applied and reapplied even on cloudy days, post swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.