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 20.2°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.

68.4

°F

July 12, 03:08

Trend:

increasing

Yesterday:

68.2°F

Tomorrow:

68.9°F

Sunrise:

05:12

Sunset:

21:30

Day Length:

16 h. 18 min.

Swansea in July

Minimum:

46.0°F

Average:

47.4°F

Maximum:

49.4°F

Sea water temperature in Swansea today

As of now, in Swansea, the water temperature is 68.4°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 5.1°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 66.8°F on 2025, while the historical minimum was 60.6°F on 2016.

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. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 69.3°F, with minimum temperature starting at 68.9°F, while the maximum might reach 70.0°F.

Daily water temperature in Swansea

Date	Current Year actual* / forecast**	last year	10 years average
Jun 28	66.4°F	64.2°F	62.5°F
Jun 29	66.0°F	63.9°F	62.4°F
Jun 30	65.4°F	64.7°F	62.7°F
Jul 1	65.2°F	64.6°F	62.5°F
Jul 2	64.4°F	64.4°F	62.6°F
Jul 3	65.3°F	64.7°F	62.7°F
Jul 4	66.2°F	64.3°F	62.8°F
Jul 5	65.8°F	64.4°F	62.7°F
Jul 6	65.2°F	64.1°F	62.8°F
Jul 7	66.3°F	64.5°F	63.0°F
Jul 8	66.2°F	65.1°F	63.3°F
Jul 9	67.0°F	64.9°F	63.5°F
Jul 10	67.2°F	65.9°F	63.6°F
Jul 11	68.2°F	65.4°F	63.1°F
Jul 12	68.4°F	66.8°F	63.3°F
Jul 13	68.9°F	67.4°F	63.8°F
Jul 14	69.3°F	68.5°F	64.2°F
Jul 15	69.2°F	67.7°F	64.1°F
Jul 16	69.1°F	66.4°F	64.0°F
Jul 17	69.2°F	66.1°F	64.2°F
Jul 18	69.5°F	66.2°F	64.5°F
Jul 19	70.0°F	66.0°F	64.9°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, 63.2°F in Summer, and 59.2°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Barry	68.3°F	32mi
Cardiff	69.8°F	34mi
Newport	70.7°F	41mi
Aberystwyth	67.2°F	55mi

* current water temperature in this city

** straight line distance from Swansea