Sea Temperature in Letterfrack in September

© Gilles Doubrovsky

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

Letterfrack Climate and Swimming Opportunities in September

Letterfrack lies within the Connacht in Ireland. The average daytime temperature in Letterfrack in September is 17°C (63°F), while the nighttime average is 10°C (51°F). There are typically 14 rainy days during the month, with a total precipitation of 96 mm (3.8 inches). The daylight duration in September in Letterfrack is 13 hours, with an average of 3 hours of sunshine per day. The average wind speed in September is 17 km/h (11 mph), and the humidity level is around 86%.

The water temperature in Letterfrack in September ranges from 14°C to 16°C (57°F to 61°F). At the beginning of the month, the average temperature is around 16°C (61°F), shifting to 15°C (59°F) by mid-September and reaching 15°C (59°F) in the last ten days. Overall, the average sea temperature in Letterfrack for September is 15°C (59°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 Letterfrack