What is the current water temperature in Swansea?

Q: What is the current water temperature in Swansea?

As of now, in Swansea, the water temperature is 10.02°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United Kingdom > Swansea

Water temperature in Swansea

Detailed information about the current water temperature in Swansea. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

50.0

°F

December 7, 23:55

Trend:

decreasing

Yesterday:

50.1°F

Tomorrow:

49.9°F

Sunrise:

08:07

Sunset:

16:07

Day Length:

8 h. 0 min.

Swansea in December

Minimum:

45.5°F

Average:

46.9°F

Maximum:

48.9°F

Sea water temperature in Swansea today

As of now, in Swansea, the water temperature is 50.0°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.5°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 52.0°F on 2015, while the historical minimum was 49.5°F on 2019.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 49.3°F, the minimum temperature may reach 48.8°F, and the maximum might stay at 49.9°F.

Daily water temperature in Swansea

Date	Current Year actual* / forecast**	last year	10 years average
Nov 23	52.7°F	53.4°F	53.2°F
Nov 24	52.4°F	53.3°F	53.0°F
Nov 25	52.0°F	53.2°F	52.8°F
Nov 26	51.4°F	52.9°F	52.5°F
Nov 27	51.5°F	52.6°F	52.4°F
Nov 28	51.3°F	52.3°F	52.2°F
Nov 29	51.4°F	52.2°F	52.0°F
Nov 30	50.6°F	52.0°F	51.8°F
Dec 1	50.8°F	51.8°F	51.4°F
Dec 2	50.9°F	51.9°F	51.4°F
Dec 3	50.6°F	51.7°F	51.2°F
Dec 4	50.4°F	51.5°F	50.8°F
Dec 5	50.2°F	51.2°F	50.8°F
Dec 6	50.1°F	51.1°F	50.5°F
Dec 7	50.0°F	50.9°F	50.6°F
Dec 8	49.9°F	50.8°F	50.4°F
Dec 9	49.6°F	50.8°F	50.1°F
Dec 10	49.5°F	50.5°F	50.0°F
Dec 11	49.2°F	49.5°F	49.8°F
Dec 12	49.1°F	49.6°F	49.7°F
Dec 13	49.0°F	49.5°F	49.5°F
Dec 14	48.8°F	49.5°F	49.3°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Swansea by month

In an average year, Swansea offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Swansea was recorded on July 14, 2025, reaching a 68.5°F. While the coldest temperature occurred on March 10, 2018, dipping to 42.2°F. The average readings by season are 47.2°F in Winter, 49.9°F in Spring, 62.9°F in Summer, and 59.1°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Barry	49.5°F	32mi
Cardiff	48.7°F	34mi
Newport	47.5°F	41mi
Aberystwyth	49.4°F	55mi

* current water temperature in this city

** straight line distance from Swansea