Sea Temperature in Shannon in September

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

55°F

MINIMUN

60°F

AVERAGE

64°F

MAXIMUM

Historical Data of Water Temperature in September in Shannon

Water Temperature Chart for Celtic Sea in Shannon in September

Sea Temperature Table in Shannon in September Over the Past Years

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

Shannon Climate and Swimming Opportunities in September

63°F

Average Day Air Temperature

50°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

85%

Average
humidity

Shannon lies within the Munster in Ireland. The average daytime temperature in Shannon 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 85 mm (3.4 inches). The daylight duration in September in Shannon is 13 hours, with an average of 4 hours of sunshine per day. The average wind speed in September is 14 km/h (9 mph), and the humidity level is around 85%.

The water temperature in Shannon 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 Shannon 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 Shannon

What is the sea temperature in Shannon in September?

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

Is it possible to swim in the Celtic Sea in Shannon in September?

The average sea temperature in Shannon 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.