Sea Temperature in Llansteffan in December

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

8°C

MINIMUN

10.5°C

AVERAGE

13°C

MAXIMUM

Historical Data of Water Temperature in December in Llansteffan

Water Temperature Chart for Celtic Sea in Llansteffan in December

Sea Temperature Table in Llansteffan in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	12°C	12°C	13°C	12.3°C
Dec 2	12°C	12°C	12°C	12.0°C
Dec 3	12°C	11°C	12°C	11.8°C
Dec 4	11°C	11°C	12°C	11.5°C
Dec 5	11°C	11°C	12°C	11.3°C
Dec 6	11°C	11°C	12°C	11.3°C
Dec 7	11°C	11°C	12°C	11.3°C
Dec 8	11°C	11°C	10°C	11.0°C
Dec 9	11°C	11°C	10°C	11.0°C
Dec 10	11°C	11°C	11°C	11.0°C
Dec 11	11°C	10°C	11°C	10.8°C
Dec 12	11°C	10°C	11°C	10.5°C
Dec 13	11°C	10°C	11°C	10.8°C
Dec 14	10°C	11°C	11°C	10.5°C
Dec 15	10°C	10°C	10°C	10.0°C
Dec 16	9°C	10°C	11°C	10.0°C
Dec 17	10°C	9°C	10°C	10.0°C
Dec 18	10°C	9°C	10°C	9.8°C
Dec 19	10°C	9°C	10°C	9.8°C
Dec 20	9°C	9°C	10°C	9.5°C
Dec 21	9°C	10°C	9°C	9.5°C
Dec 22	10°C	10°C	10°C	10.3°C
Dec 23	10°C	10°C	9°C	9.8°C
Dec 24	9°C	10°C	9°C	9.5°C
Dec 25	9°C	10°C	10°C	9.8°C
Dec 26	9°C	10°C	10°C	9.8°C
Dec 27	8°C	10°C	9°C	9.3°C
Dec 28	8°C	9°C	9°C	9.0°C
Dec 29	8°C	10°C	9°C	9.3°C
Dec 30	8°C	9°C	9°C	9.0°C

Llansteffan Climate and Swimming Opportunities in December

9°C

Average Day Air Temperature

3°C

Average Night Air Temperature

109 mm

Precipitation Amount per Month

17 days

Number of Rainy Days

8 hrs

Daylight
per Day

2 hrs

Sunshine
per Day

16 km/h

Average Wind Speed

92%

Average
humidity

Llansteffan lies within the Wales in United Kingdom. The average daytime temperature in Llansteffan in December is 9°C (47°F), while the nighttime average is 3°C (38°F). There are typically 17 rainy days during the month, with a total precipitation of 109 mm (4.3 inches). The daylight duration in December in Llansteffan is 8 hours, with an average of 2 hours of sunshine per day. The average wind speed in December is 16 km/h (10 mph), and the humidity level is around 92%.

The water temperature in Llansteffan in December ranges from 9°C to 12°C (48°F to 54°F). At the beginning of the month, the average temperature is around 12°C (54°F), shifting to 10°C (50°F) by mid-December and reaching 10°C (50°F) in the last ten days. Overall, the average sea temperature in Llansteffan for December is 10°C (50°F). Still too cold for most swimmers. Only short dips in proper gear are advisable.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in Llansteffan

What is the sea temperature in Llansteffan in December?

The water temperature in the Celtic Sea in Llansteffan in December ranges from 9°C to 12°C (48°F to 54°F).

Is it possible to swim in the Celtic Sea in Llansteffan in December?

The average sea temperature in Llansteffan in December is 10°C (50°F), and the air temperature is 9°C (47°F), so still too cold for most swimmers. Only short dips in proper gear are advisable.