August weather forecast
St. Augustine, FL

August maintains the summer spirit in St. Augustine, albeit with a slightly pronounced tropical feel. The city remains basked in sunshine, interspersed with welcome breaks in the form of showers. The city witnesses the highest average rainfall during this month, summing up to 6.5" (165mm) spread across 15 days. The sea temperature also reaches its peak, making it ideal for water-based activities. Therefore, the month of August unveils a tropical splendor imbued with St. Augustine's characteristic sunny outlook.

Temperature

With the start of August, St. Augustine measures an average high-temperature of a still hot 89.1°F (31.7°C), not significantly differing from July's 90°F (32.2°C). Nighttime temperature in St. Augustine dips to a mean of 73°F (22.8°C) during August.

Rainfall

In St. Augustine, in August, it is raining for 15 days, with typically 6.5" (165mm) of accumulated precipitation. Throughout the year, in St. Augustine, there are 116 rainfall days, and 50" (1270mm) of precipitation is accumulated.

Ocean temperature

August is the month with the warmest seawater in St. Augustine, with an average ocean temperature of 83.8°F (28.8°C).
Note: For swimming, diving, or other water activities, the temperature range of 77°F (25°C) to 84.2°F (29°C) is perceived as exceptionally enjoyable and comfortable even for prolonged periods.

Daylight

The average length of the day in August in St. Augustine is 13h and 11min.
On the first day of August in St. Augustine, sunrise is at 6:44 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 7:48 pm EDT.

Sunshine

March through August, with an average of 9h of sunshine, are months with the most sunshine in St. Augustine.

UV index

In St. Augustine, the average daily maximum UV index in August is 10. A UV Index reading of 8 to 10 represents a very high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In August, the maximum UV index of 10 translates into these guidelines:
Ensure you're protected; unprotected eyes and skin can get hurt in moments. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. During bright days, sunglasses that offer UVA and UVB defense are recommended. Use liberally and reapply a broad-spectrum sunscreen with at least SPF 30 every two hours and right after outdoor activities or a swim. Attention! The reflection of both water and sand can increase the intensity of UV rays.