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 15.46°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.

59.8

°F

October 10, 19:25

Trend:

decreasing

Yesterday:

60.0°F

Tomorrow:

59.7°F

Sunrise:

07:31

Sunset:

18:34

Day Length:

11 h. 3 min.

Swansea in October

Minimum:

45.6°F

Average:

47.3°F

Maximum:

49.6°F

Sea water temperature in Swansea today

As of now, in Swansea, the water temperature is 59.8°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. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall 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 61.9°F on 2023, while the historical minimum was 58.6°F on 2020.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 59.4°F, the minimum temperature may reach 59.1°F, and the maximum might stay at 59.7°F.

Daily water temperature in Swansea

Date	Current Year actual* / forecast**	last year	10 years average
Sep 26	61.1°F	61.6°F	62.4°F
Sep 27	61.3°F	61.5°F	62.3°F
Sep 28	60.9°F	61.0°F	62.0°F
Sep 29	60.8°F	61.0°F	61.9°F
Sep 30	60.8°F	60.9°F	61.6°F
Oct 1	60.8°F	60.1°F	61.5°F
Oct 2	60.8°F	60.1°F	61.4°F
Oct 3	60.8°F	59.9°F	61.3°F
Oct 4	60.9°F	60.0°F	61.1°F
Oct 5	60.4°F	59.9°F	60.8°F
Oct 6	60.1°F	59.4°F	60.6°F
Oct 7	60.2°F	59.4°F	60.5°F
Oct 8	60.1°F	59.4°F	60.5°F
Oct 9	60.0°F	59.0°F	60.3°F
Oct 10	59.8°F	59.1°F	60.1°F
Oct 11	59.7°F	58.5°F	60.0°F
Oct 12	59.7°F	58.9°F	60.0°F
Oct 13	59.5°F	58.2°F	59.8°F
Oct 14	59.5°F	58.4°F	59.8°F
Oct 15	59.4°F	58.4°F	59.7°F
Oct 16	59.2°F	58.4°F	59.5°F
Oct 17	59.1°F	57.6°F	59.4°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 47.2°F in Winter, 49.9°F in Spring, 62.9°F in Summer, and 59.1°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Barry	58.8°F	32mi
Cardiff	58.2°F	34mi
Newport	56.8°F	41mi
Aberystwyth	58.2°F	55mi

* current water temperature in this city

** straight line distance from Swansea