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 10.1°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.

50.2

°F

April 9, 18:27

Trend:

increasing

Yesterday:

50.0°F

Tomorrow:

50.3°F

Sunrise:

06:34

Sunset:

20:02

Day Length:

13 h. 28 min.

Swansea in April

Minimum:

46.0°F

Average:

48.0°F

Maximum:

50.8°F

Sea water temperature in Swansea today

As of now, in Swansea, the water temperature is 50.2°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 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 50.7°F on 2025, while the historical minimum was 45.3°F on 2018.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 50.5°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Swansea

Date	Current Year actual* / forecast**	last year	10 years average
Mar 26	49.1°F	47.9°F	47.4°F
Mar 27	49.1°F	48.3°F	47.5°F
Mar 28	48.7°F	48.2°F	47.5°F
Mar 29	48.8°F	48.7°F	47.5°F
Mar 30	48.7°F	48.4°F	47.5°F
Mar 31	48.6°F	49.2°F	47.7°F
Apr 1	48.9°F	49.5°F	47.9°F
Apr 2	49.2°F	49.9°F	48.1°F
Apr 3	49.1°F	49.8°F	48.3°F
Apr 4	48.4°F	50.5°F	48.2°F
Apr 5	49.2°F	50.9°F	48.5°F
Apr 6	49.4°F	51.1°F	48.4°F
Apr 7	49.9°F	51.4°F	48.8°F
Apr 8	50.0°F	50.6°F	48.8°F
Apr 9	50.2°F	50.7°F	48.7°F
Apr 10	50.3°F	51.0°F	48.9°F
Apr 11	50.4°F	51.0°F	49.0°F
Apr 12	50.5°F	51.8°F	49.0°F
Apr 13	50.5°F	51.1°F	49.0°F
Apr 14	50.5°F	51.4°F	49.1°F
Apr 15	50.7°F	51.1°F	49.3°F
Apr 16	50.7°F	50.8°F	49.3°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	50.0°F	32mi
Cardiff	50.6°F	34mi
Newport	50.8°F	41mi
Aberystwyth	49.4°F	55mi

* current water temperature in this city

** straight line distance from Swansea