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Sea Temperature in Holyhead in September
Complete information on the sea temperature range in the Celtic Sea in Holyhead in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Holyhead. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Holyhead in September
14°C
MINIMUN
16°C
AVERAGE
18°C
MAXIMUM
Historical Data of Water Temperature in September in Holyhead
Water Temperature Chart for Celtic Sea in Holyhead in September
Sea Temperature Table in Holyhead in September Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| Sep 1 | 15°C | 16°C | 16°C | 15.5°C |
| Sep 2 | 16°C | 16°C | 15°C | 15.5°C |
| Sep 3 | 16°C | 16°C | 16°C | 16.0°C |
| Sep 4 | 16°C | 16°C | 16°C | 15.8°C |
| Sep 5 | 16°C | 16°C | 14°C | 15.3°C |
| Sep 6 | 16°C | 16°C | 14°C | 15.3°C |
| Sep 7 | 15°C | 16°C | 15°C | 15.3°C |
| Sep 8 | 15°C | 16°C | 15°C | 15.3°C |
| Sep 9 | 14°C | 16°C | 15°C | 15.3°C |
| Sep 10 | 15°C | 16°C | 15°C | 15.3°C |
| Sep 11 | 15°C | 15°C | 15°C | 15.3°C |
| Sep 12 | 14°C | 16°C | 15°C | 15.0°C |
| Sep 13 | 15°C | 16°C | 15°C | 15.3°C |
| Sep 14 | 15°C | 16°C | 15°C | 15.3°C |
| Sep 15 | 15°C | 15°C | 15°C | 15.0°C |
| Sep 16 | 14°C | 16°C | 15°C | 15.0°C |
| Sep 17 | 15°C | 16°C | 15°C | 15.3°C |
| Sep 18 | 16°C | 15°C | 15°C | 15.3°C |
| Sep 19 | 16°C | 16°C | 15°C | 15.5°C |
| Sep 20 | 16°C | 16°C | 15°C | 15.5°C |
| Sep 21 | 16°C | 15°C | 14°C | 15.0°C |
| Sep 22 | 17°C | 15°C | 15°C | 15.5°C |
| Sep 23 | 16°C | 15°C | 15°C | 15.3°C |
| Sep 24 | 16°C | 15°C | 15°C | 15.3°C |
| Sep 25 | 17°C | 15°C | 15°C | 15.5°C |
| Sep 26 | 16°C | 15°C | 15°C | 15.3°C |
| Sep 27 | 16°C | 15°C | 15°C | 15.3°C |
| Sep 28 | 16°C | 15°C | 15°C | 15.3°C |
| Sep 29 | 16°C | 15°C | 15°C | 15.3°C |
Holyhead Climate and Swimming Opportunities in September
17°C
Average Day Air Temperature
11°C
Average Night Air Temperature
82 mm
Precipitation Amount per Month
14 days
Number of Rainy Days
13 hrs
Daylight
per Day
4 hrs
Sunshine
per Day
15 km/h
Average Wind Speed
86%
Average
humidity
Holyhead lies within the Wales in United Kingdom. The average daytime temperature in Holyhead in September is 17°C (63°F), while the nighttime average is 11°C (51°F). There are typically 14 rainy days during the month, with a total precipitation of 82 mm (3.2 inches). The daylight duration in September in Holyhead is 13 hours, with an average of 4 hours of sunshine per day. The average wind speed in September is 15 km/h (9 mph), and the humidity level is around 86%.
The water temperature in Holyhead in September ranges from 15°C to 16°C (59°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 Holyhead for September is 15°C (59°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.
Sea Temperature in September in Nearby Cities
Frequently Asked Questions About Water Temperatures in September in Holyhead
What is the sea temperature in Holyhead in September?
The water temperature in the Celtic Sea in Holyhead in September ranges from 15°C to 16°C (59°F to 61°F).
Is it possible to swim in the Celtic Sea in Holyhead in September?
The average sea temperature in Holyhead in September is 15°C (59°F), and the air temperature is 17°C (63°F), so ideal conditions for a refreshing swim, though some may still find it a bit cool.