Sea Temperature in Dublin in September

Complete information on the sea temperature range in the Irish Sea in Dublin in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Dublin. 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 Dublin in September

55°F

MINIMUN

59°F

AVERAGE

63°F

MAXIMUM

Historical Data of Water Temperature in September in Dublin

Water Temperature Chart for Irish Sea in Dublin in September

Sea Temperature Table in Dublin in September Over the Past Years

Day	2024	2023	2022	Average
Sep 1	57°C	59°C	61°C	59°C
Sep 2	59°C	59°C	57°C	58°C
Sep 3	57°C	59°C	59°C	58°C
Sep 4	57°C	59°C	63°C	59°C
Sep 5	59°C	59°C	63°C	60°C
Sep 6	61°C	59°C	61°C	60°C
Sep 7	57°C	59°C	63°C	59°C
Sep 8	57°C	57°C	59°C	58°C
Sep 9	55°C	59°C	63°C	59°C
Sep 10	57°C	59°C	59°C	58°C
Sep 11	57°C	59°C	61°C	59°C
Sep 12	57°C	59°C	59°C	59°C
Sep 13	57°C	59°C	63°C	59°C
Sep 14	57°C	59°C	59°C	58°C
Sep 15	57°C	57°C	61°C	58°C
Sep 16	57°C	59°C	61°C	59°C
Sep 17	57°C	59°C	59°C	58°C
Sep 18	59°C	59°C	57°C	58°C
Sep 19	61°C	59°C	59°C	59°C
Sep 20	61°C	59°C	61°C	60°C
Sep 21	61°C	57°C	61°C	59°C
Sep 22	61°C	59°C	63°C	60°C
Sep 23	61°C	57°C	59°C	58°C
Sep 24	59°C	57°C	59°C	58°C
Sep 25	59°C	57°C	59°C	58°C
Sep 26	59°C	57°C	59°C	58°C
Sep 27	59°C	59°C	59°C	59°C
Sep 28	59°C	57°C	63°C	59°C
Sep 29	59°C	57°C	61°C	59°C

Dublin Climate and Swimming Opportunities in September

63°F

Average Day Air Temperature

50°F

Average Night Air Temperature

2 in

Precipitation Amount per Month

14 days

Number of Rainy Days

13 hrs

Daylight
per Day

4 hrs

Sunshine
per Day

10 mph

Average Wind Speed

83%

Average
humidity

Dublin lies within the Leinster in Ireland. The average daytime temperature in Dublin in September is 17°C (63°F), while the nighttime average is 10°C (50°F). There are typically 14 rainy days during the month, with a total precipitation of 59 mm (2.3 inches). The daylight duration in September in Dublin is 13 hours, with an average of 4 hours of sunshine per day. The average wind speed in September is 16 km/h (10 mph), and the humidity level is around 83%.

The water temperature in Dublin in September ranges from 14°C to 15°C (57°F to 59°F). At the beginning of the month, the average temperature is around 15°C (59°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 Dublin 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 Dublin

What is the sea temperature in Dublin in September?

The water temperature in the Irish Sea in Dublin in September ranges from 14°C to 15°C (57°F to 59°F).

Is it possible to swim in the Irish Sea in Dublin in September?

The average sea temperature in Dublin 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.