September marks the end of the southwest monsoon at Unawatuna Beach, with the weather becoming drier and sunnier. This is a good time for sunbathing, swimming, snorkeling, and diving, as water conditions improve. Surfing conditions are also favorable, with consistent swells and moderate winds. Also consider one of our other suggestions for September.
September is still part of the low season, and the crowds at Unawatuna Beach remain relatively low. The Binara Full Moon Poya Day, a public holiday, falls in September, but it does not have a significant impact on the crowd levels at the beach.
The average maximum temperature in Unawatuna Beach in September is 30°. The average maximum temperature is 30° in the previous month and 30° in the next month.
The average temperature in Unawatuna Beach in September is 28°. The average temperature ranges is 28° in the previous month and 27° in the next month.
The average minimum temperature in Unawatuna Beach in September is 25°. The minimum temperature is 26° in the previous month and 25° in the next month.
The average day light hours per day in Unawatuna Beach in September are 12.2 and there are 8.8 hours of sunshine per day on average during September making it a sunny month with few clouds.
The ultraviolet index in Unawatuna Beach in September is typically 14.3 during September. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The average sea water temperature in Unawatuna Beach in September is 28.3° which is very warm and ideal for relaxing and swimming for the whole day.
The average total rainfall in Unawatuna Beach in September is 0.5cm and on average there are 13.8 rainy days in September making it a slightly wet time to visit the beach.
The maximum dew point (an indicator of humidity) in Unawatuna Beach in September is 25° which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning. The dew point is 24° in the previous month and 24° in the next month.
The average maximum relative humidity in Unawatuna Beach in September is typically 90.1%. The maximum relative humidity is 87.6% in the previous month and 92.8% in the next month.
The average relative humidity in Unawatuna Beach in September is typically 79.8%. The average relative humidity is 78.7% in the previous month and 81.1% in the next month.
The average maximum wind speed in Unawatuna Beach in September is typically 22kmh. The average maximum wind speed is 23kmh in the previous month and 19kmh in the next month.
The average wind speed in Unawatuna Beach in September is typically 13kmh. The average wind speed is 15kmh in the previous month and 10kmh in the next month.
The average wind direction in Unawatuna Beach in September is from the South West.
