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 14.78°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.

58.6

°F

May 30, 21:35

Trend:

increasing

Yesterday:

58.2°F

Tomorrow:

58.7°F

Sunrise:

05:06

Sunset:

21:21

Day Length:

16 h. 15 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 58.6°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 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 59.5°F on 2020, while the historical minimum was 55.0°F on 2021.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 59.4°F, with minimum temperature starting at 58.7°F, while the maximum might reach 59.8°F.

Daily water temperature in Swansea

Date	Current Year actual* / forecast**	last year	10 years average
May 16	54.6°F	57.5°F	54.3°F
May 17	54.4°F	58.0°F	54.6°F
May 18	54.8°F	58.6°F	54.8°F
May 19	54.7°F	58.7°F	54.9°F
May 20	55.1°F	58.9°F	55.3°F
May 21	54.8°F	58.3°F	55.5°F
May 22	56.0°F	58.7°F	55.8°F
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	57.2°F
May 31	58.7°F	57.9°F	57.3°F
Jun 1	59.1°F	59.6°F	57.7°F
Jun 2	59.2°F	59.4°F	57.8°F
Jun 3	59.5°F	58.6°F	58.1°F
Jun 4	59.8°F	58.6°F	58.4°F
Jun 5	59.7°F	59.4°F	58.3°F
Jun 6	59.7°F	59.3°F	58.4°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	59.1°F	32mi
Cardiff	60.5°F	34mi
Newport	61.8°F	41mi
Aberystwyth	59.2°F	55mi

* current water temperature in this city

** straight line distance from Swansea