All data are in degrees Fahrenheit

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Water temperature in Cardiff

Detailed information about the current water temperature in Cardiff. 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.
Sea temperature in Cardiff now

47.6

°F

March 26, 20:36

Trend:

increasing

Yesterday:

47.2°F

Tomorrow:

47.6°F

Sunrise:

06:03

Sunset:

18:35

Day Length:

12 h. 32 min.

Cardiff in April

Minimum:

45.1°F

Average:

46.4°F

Maximum:

48.4°F

Sea water temperature in Cardiff today

As of now, in Cardiff, the water temperature is 47.6°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 1.0°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 48.5°F on 2024, while the historical minimum was 41.6°F on 2018.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 47.9°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Cardiff

Date Current Year

actual* / forecast**

last year 10 years average
Mar 12 45.8°F 45.9°F 44.7°F
Mar 13 45.9°F 45.9°F 44.8°F
Mar 14 45.7°F 46.0°F 44.9°F
Mar 15 46.1°F 46.1°F 45.1°F
Mar 16 45.8°F 47.3°F 45.3°F
Mar 17 45.9°F 46.9°F 45.4°F
Mar 18 45.3°F 47.5°F 45.3°F
Mar 19 45.9°F 47.4°F 45.4°F
Mar 20 44.8°F 47.3°F 45.2°F
Mar 21 45.2°F 47.4°F 45.2°F
Mar 22 45.8°F 47.3°F 45.5°F
Mar 23 46.3°F 48.3°F 45.6°F
Mar 24 46.4°F 48.7°F 45.8°F
Mar 25 47.2°F 48.6°F 46.3°F
Mar 26 47.6°F 48.5°F 46.6°F
Mar 27 47.6°F 48.3°F 46.6°F
Mar 28 47.6°F 48.3°F 46.6°F
Mar 29 47.6°F 47.6°F 46.7°F
Mar 30 47.8°F 48.1°F 46.9°F
Mar 31 48.0°F 48.6°F 47.0°F
Apr 1 48.2°F 48.5°F 47.2°F
Apr 2 48.3°F 49.0°F 47.3°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 Cardiff by month

In an average year, Cardiff offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Cardiff was recorded on August 15, 2022, reaching a 70.0°F. While the coldest temperature occurred on March 4, 2018, dipping to 39.0°F. The average readings by season are 45.7°F in Winter, 49.9°F in Spring, 64.1°F in Summer, and 58.3°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Barry 47.4°F 7mi
Newport 48.7°F 11mi
Bristol 47.8°F 25mi
Swansea 47.9°F 34mi

* current water temperature in this city

** straight line distance from Cardiff