Sea Temperature in Sennen in September

© Mark Salmon

Complete information on the sea temperature range in the Celtic Sea in Sennen in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Sennen. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Sennen Climate and Swimming Opportunities in September

Sennen lies within the England in United Kingdom. The average daytime temperature in Sennen in September is 20°C (67°F), while the nighttime average is 12°C (54°F). There are typically 10 rainy days during the month, with a total precipitation of 76 mm (3.0 inches). The daylight duration in September in Sennen is 12 hours, with an average of 6 hours of sunshine per day. The average wind speed in September is 19 km/h (12 mph), and the humidity level is around 84%.

The water temperature in Sennen in September ranges from 15°C to 17°C (59°F to 63°F). At the beginning of the month, the average temperature is around 17°C (63°F), shifting to 16°C (61°F) by mid-September and reaching 16°C (61°F) in the last ten days. Overall, the average sea temperature in Sennen for September is 16°C (61°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Frequently Asked Questions About Water Temperatures in September in Sennen