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 15.49°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.

59.9

°F

June 6, 21:42

Trend:

increasing

Yesterday:

59.8°F

Tomorrow:

60.4°F

Sunrise:

05:00

Sunset:

21:29

Day Length:

16 h. 29 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 59.9°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 1.5°F higher 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 rise a bit.

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 60.7°F on 2023, while the historical minimum was 56.8°F on 2021.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 60.6°F, with minimum temperature starting at 60.4°F, while the maximum might reach 60.8°F.

Daily water temperature in Swansea

Date	Current Year actual* / forecast**	last year	10 years average
May 23	56.1°F	59.1°F	56.0°F
May 24	56.1°F	58.9°F	56.2°F
May 25	57.6°F	58.5°F	56.4°F
May 26	58.6°F	58.9°F	56.6°F
May 27	59.3°F	58.4°F	56.8°F
May 28	59.7°F	58.4°F	57.1°F
May 29	58.2°F	58.5°F	57.1°F
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	58.4°F
Jun 7	60.4°F	59.0°F	58.8°F
Jun 8	60.5°F	59.3°F	58.9°F
Jun 9	60.5°F	59.0°F	59.0°F
Jun 10	60.4°F	58.9°F	58.9°F
Jun 11	60.7°F	59.9°F	59.1°F
Jun 12	60.8°F	60.7°F	59.3°F
Jun 13	60.8°F	60.2°F	59.3°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, 50.1°F in Spring, 63.1°F in Summer, and 59.2°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Barry	60.0°F	32mi
Cardiff	61.5°F	34mi
Newport	62.2°F	41mi
Aberystwyth	58.8°F	55mi

* current water temperature in this city

** straight line distance from Swansea