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

57°F

MINIMUN

61°F

AVERAGE

64°F

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	59°C	61°C	61°C	60°C
Sep 2	61°C	61°C	59°C	60°C
Sep 3	61°C	61°C	61°C	61°C
Sep 4	61°C	61°C	61°C	60°C
Sep 5	61°C	61°C	57°C	60°C
Sep 6	61°C	61°C	57°C	60°C
Sep 7	59°C	61°C	59°C	60°C
Sep 8	59°C	61°C	59°C	60°C
Sep 9	57°C	61°C	59°C	60°C
Sep 10	59°C	61°C	59°C	60°C
Sep 11	59°C	59°C	59°C	60°C
Sep 12	57°C	61°C	59°C	59°C
Sep 13	59°C	61°C	59°C	60°C
Sep 14	59°C	61°C	59°C	60°C
Sep 15	59°C	59°C	59°C	59°C
Sep 16	57°C	61°C	59°C	59°C
Sep 17	59°C	61°C	59°C	60°C
Sep 18	61°C	59°C	59°C	60°C
Sep 19	61°C	61°C	59°C	60°C
Sep 20	61°C	61°C	59°C	60°C
Sep 21	61°C	59°C	57°C	59°C
Sep 22	63°C	59°C	59°C	60°C
Sep 23	61°C	59°C	59°C	60°C
Sep 24	61°C	59°C	59°C	60°C
Sep 25	63°C	59°C	59°C	60°C
Sep 26	61°C	59°C	59°C	60°C
Sep 27	61°C	59°C	59°C	60°C
Sep 28	61°C	59°C	59°C	60°C
Sep 29	61°C	59°C	59°C	60°C

Holyhead Climate and Swimming Opportunities in September

63°F

Average Day Air Temperature

52°F

Average Night Air Temperature

3 in

Precipitation Amount per Month

14 days

Number of Rainy Days

13 hrs

Daylight
per Day

4 hrs

Sunshine
per Day

9 mph

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.