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 9.46°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.

49.0

°F

March 19, 16:54

Trend:

stable

Yesterday:

48.5°F

Tomorrow:

48.9°F

Sunrise:

06:22

Sunset:

18:27

Day Length:

12 h. 5 min.

Swansea in March

Minimum:

46.5°F

Average:

48.1°F

Maximum:

50.3°F

Sea water temperature in Swansea today

As of now, in Swansea, the water temperature is 49.0°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 2.8°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 48.2°F on 2024, while the historical minimum was 43.6°F on 2018.

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 suggests a gradual increase. The average temperature is expected to rise up to 49.4°F, with minimum temperature starting at 48.9°F, while the maximum might reach 50.0°F.

Daily water temperature in Swansea

Date	Current Year actual* / forecast**	last year	10 years average
Mar 5	47.9°F	45.2°F	45.5°F
Mar 6	47.4°F	45.4°F	45.5°F
Mar 7	47.5°F	45.6°F	45.5°F
Mar 8	47.2°F	45.7°F	45.4°F
Mar 9	47.4°F	45.2°F	45.4°F
Mar 10	47.0°F	45.4°F	45.4°F
Mar 11	47.7°F	45.9°F	45.6°F
Mar 12	48.0°F	46.6°F	45.7°F
Mar 13	47.9°F	46.6°F	45.8°F
Mar 14	47.2°F	46.4°F	45.8°F
Mar 15	46.9°F	46.5°F	45.9°F
Mar 16	47.5°F	46.1°F	46.1°F
Mar 17	47.3°F	46.3°F	46.2°F
Mar 18	48.5°F	46.3°F	46.3°F
Mar 19	49.0°F	46.6°F	46.3°F
Mar 20	48.9°F	46.2°F	46.2°F
Mar 21	49.0°F	46.7°F	46.3°F
Mar 22	49.1°F	46.7°F	46.4°F
Mar 23	49.4°F	47.8°F	46.7°F
Mar 24	49.5°F	48.2°F	46.8°F
Mar 25	49.9°F	48.4°F	47.1°F
Mar 26	50.0°F	47.9°F	47.3°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 47.1°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	48.6°F	32mi
Cardiff	49.0°F	34mi
Newport	48.7°F	41mi
Aberystwyth	48.5°F	55mi

* current water temperature in this city

** straight line distance from Swansea