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 8.26°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.

46.9

°F

January 2, 07:50

Trend:

increasing

Yesterday:

46.8°F

Tomorrow:

46.9°F

Sunrise:

08:22

Sunset:

16:18

Day Length:

7 h. 56 min.

Swansea in January

Minimum:

46.5°F

Average:

48.0°F

Maximum:

51.1°F

Sea water temperature in Swansea today

As of now, in Swansea, the water temperature is 46.9°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 1.4°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 stay about the same.

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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 50.8°F on 2016, while the historical minimum was 46.8°F on 2021.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 46.4°F, the minimum temperature may reach 46.1°F, and the maximum might stay at 46.9°F.

Daily water temperature in Swansea

Date	Current Year actual* / forecast**	last year	10 years average
Jan 1	46.8°F	46.5°F	48.0°F
Jan 2	46.9°F	47.0°F	48.2°F
Jan 3	46.9°F	47.2°F	48.2°F
Jan 4	46.8°F	47.3°F	48.2°F
Jan 5	46.5°F	47.0°F	47.9°F
Jan 6	46.4°F	47.0°F	47.7°F
Jan 7	46.2°F	46.6°F	47.5°F
Jan 8	46.1°F	46.7°F	47.4°F
Jan 9	46.1°F	46.5°F	47.4°F
Dec 19	49.8°F	48.9°F	48.4°F
Dec 20	49.7°F	48.5°F	48.5°F
Dec 21	49.6°F	48.8°F	48.3°F
Dec 22	49.5°F	48.5°F	48.3°F
Dec 23	49.4°F	48.7°F	48.2°F
Dec 24	49.3°F	48.1°F	48.2°F
Dec 25	49.0°F	48.7°F	48.3°F
Dec 26	49.0°F	47.4°F	48.2°F
Dec 27	47.8°F	47.1°F	48.0°F
Dec 28	48.2°F	46.9°F	47.9°F
Dec 29	48.3°F	46.9°F	48.1°F
Dec 30	48.3°F	45.8°F	47.9°F
Dec 31	47.1°F	46.5°F	47.8°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, 50.0°F in Spring, 63.1°F in Summer, and 59.2°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Barry	45.6°F	32mi
Cardiff	45.0°F	34mi
Newport	43.4°F	41mi
Aberystwyth	46.3°F	55mi

* current water temperature in this city

** straight line distance from Swansea