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 15.0°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.

59.0

°F

June 13, 23:05

Trend:

increasing

Yesterday:

58.3°F

Tomorrow:

59.3°F

Sunrise:

04:58

Sunset:

21:34

Day Length:

16 h. 36 min.

Swansea in June

Minimum:

45.9°F

Average:

47.6°F

Maximum:

49.7°F

Sea water temperature in Swansea today

As of now, in Swansea, the water temperature is 59.0°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 0.3°F lower 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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is slightly 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 60.8°F on 2023, while the historical minimum was 57.4°F on 2017.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 60.0°F, with minimum temperature starting at 59.3°F, while the maximum might reach 60.7°F.

Daily water temperature in Swansea

Date	Current Year actual* / forecast**	last year	10 years average
May 30	58.6°F	58.2°F	57.3°F
May 31	58.5°F	57.9°F	57.4°F
Jun 1	59.8°F	59.6°F	57.9°F
Jun 2	59.6°F	59.4°F	57.8°F
Jun 3	60.3°F	58.6°F	58.3°F
Jun 4	60.1°F	58.6°F	58.5°F
Jun 5	59.8°F	59.4°F	58.4°F
Jun 6	59.9°F	59.3°F	58.5°F
Jun 7	59.7°F	59.0°F	58.9°F
Jun 8	59.1°F	59.3°F	59.0°F
Jun 9	60.0°F	59.0°F	59.1°F
Jun 10	59.7°F	58.9°F	58.9°F
Jun 11	59.4°F	59.9°F	59.2°F
Jun 12	58.3°F	60.7°F	59.2°F
Jun 13	59.0°F	60.2°F	59.3°F
Jun 14	59.3°F	60.0°F	59.5°F
Jun 15	59.6°F	60.7°F	59.8°F
Jun 16	59.8°F	61.4°F	60.1°F
Jun 17	60.1°F	60.6°F	60.4°F
Jun 18	60.3°F	60.6°F	60.5°F
Jun 19	60.2°F	62.1°F	60.5°F
Jun 20	60.7°F	63.5°F	61.0°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, 50.1°F in Spring, 63.1°F in Summer, and 59.2°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Barry	59.0°F	32mi
Cardiff	59.1°F	34mi
Newport	60.2°F	41mi
Aberystwyth	59.0°F	55mi

* current water temperature in this city

** straight line distance from Swansea