Sea Temperature in Saint-Cast-le-Guildo in December

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

9°C

MINIMUN

11.5°C

AVERAGE

14°C

MAXIMUM

Historical Data of Water Temperature in December in Saint-Cast-le-Guildo

Water Temperature Chart for Celtic Sea in Saint-Cast-le-Guildo in December

Sea Temperature Table in Saint-Cast-le-Guildo in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	12°C	13°C	13°C	12.8°C
Dec 2	13°C	13°C	13°C	12.8°C
Dec 3	13°C	13°C	13°C	12.8°C
Dec 4	12°C	12°C	13°C	12.3°C
Dec 5	12°C	12°C	13°C	12.3°C
Dec 6	12°C	12°C	13°C	12.3°C
Dec 7	12°C	12°C	12°C	12.0°C
Dec 8	12°C	12°C	12°C	12.0°C
Dec 9	12°C	12°C	12°C	12.0°C
Dec 10	12°C	11°C	12°C	11.8°C
Dec 11	12°C	11°C	12°C	11.5°C
Dec 12	12°C	11°C	12°C	11.5°C
Dec 13	12°C	11°C	12°C	11.5°C
Dec 14	11°C	11°C	12°C	11.3°C
Dec 15	11°C	11°C	11°C	11.0°C
Dec 16	11°C	11°C	11°C	11.0°C
Dec 17	11°C	11°C	11°C	11.0°C
Dec 18	11°C	11°C	11°C	11.0°C
Dec 19	11°C	11°C	10°C	10.8°C
Dec 20	10°C	10°C	10°C	10.3°C
Dec 21	11°C	10°C	10°C	10.5°C
Dec 22	11°C	10°C	10°C	10.5°C
Dec 23	11°C	11°C	10°C	10.8°C
Dec 24	11°C	10°C	10°C	10.5°C
Dec 25	10°C	11°C	11°C	10.8°C
Dec 26	10°C	10°C	11°C	10.3°C
Dec 27	11°C	10°C	11°C	10.5°C
Dec 28	10°C	10°C	10°C	10.0°C
Dec 29	9°C	10°C	10°C	9.8°C
Dec 30	9°C	11°C	10°C	10.0°C

Saint-Cast-le-Guildo Climate and Swimming Opportunities in December

10°C

Average Day Air Temperature

5°C

Average Night Air Temperature

87 mm

Precipitation Amount per Month

15 days

Number of Rainy Days

8 hrs

Daylight
per Day

2 hrs

Sunshine
per Day

23 km/h

Average Wind Speed

85%

Average
humidity

Saint-Cast-le-Guildo lies within the Brittany in France. The average daytime temperature in Saint-Cast-le-Guildo in December is 10°C (51°F), while the nighttime average is 5°C (40°F). There are typically 15 rainy days during the month, with a total precipitation of 87 mm (3.4 inches). The daylight duration in December in Saint-Cast-le-Guildo is 8 hours, with an average of 2 hours of sunshine per day. The average wind speed in December is 23 km/h (14 mph), and the humidity level is around 85%.

The water temperature in Saint-Cast-le-Guildo 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 11°C (52°F) by mid-December and reaching 10°C (50°F) in the last ten days. Overall, the average sea temperature in Saint-Cast-le-Guildo for December is 11°C (52°F). The water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in Saint-Cast-le-Guildo

What is the sea temperature in Saint-Cast-le-Guildo in December?

The water temperature in the Celtic Sea in Saint-Cast-le-Guildo in December ranges from 9°C to 12°C (48°F to 54°F).

Is it possible to swim in the Celtic Sea in Saint-Cast-le-Guildo in December?

The average sea temperature in Saint-Cast-le-Guildo in December is 11°C (52°F), and the air temperature is 10°C (51°F), so the water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.