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 19.76°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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.

67.6

°F

August 29, 03:07

Trend:

stable

Yesterday:

67.6°F

Tomorrow:

67.6°F

Sunrise:

06:23

Sunset:

20:10

Day Length:

13 h. 47 min.

Swansea in September

Minimum:

46.0°F

Average:

47.5°F

Maximum:

49.9°F

Sea water temperature in Swansea today

As of now, in Swansea, the water temperature is 67.6°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 2.7°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 stay about the same.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 68.1°F on 2022, while the historical minimum was 63.4°F on 2015.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 67.3°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
Aug 15	67.5°F	66.4°F	65.4°F
Aug 16	67.8°F	65.5°F	65.5°F
Aug 17	68.0°F	65.5°F	65.5°F
Aug 18	67.8°F	65.3°F	65.4°F
Aug 19	67.4°F	65.2°F	65.6°F
Aug 20	67.1°F	65.2°F	65.3°F
Aug 21	67.0°F	65.4°F	65.3°F
Aug 22	66.6°F	65.3°F	65.2°F
Aug 23	66.7°F	65.3°F	65.2°F
Aug 24	67.1°F	65.0°F	65.3°F
Aug 25	67.1°F	64.7°F	65.3°F
Aug 26	67.5°F	64.2°F	65.2°F
Aug 27	67.5°F	64.4°F	65.3°F
Aug 28	67.6°F	64.2°F	64.9°F
Aug 29	67.6°F	63.8°F	64.8°F
Aug 30	67.6°F	64.2°F	64.9°F
Aug 31	67.5°F	63.8°F	64.7°F
Sep 1	67.4°F	64.1°F	64.7°F
Sep 2	67.3°F	64.1°F	64.6°F
Sep 3	67.2°F	64.0°F	64.4°F
Sep 4	67.1°F	64.5°F	64.4°F
Sep 5	67.3°F	64.4°F	64.5°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 59.2°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Barry	67.3°F	32mi
Cardiff	67.2°F	34mi
Newport	66.8°F	41mi
Aberystwyth	66.1°F	55mi

* current water temperature in this city

** straight line distance from Swansea