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

61.0

°F

October 16, 19:06

Trend:

stable

Yesterday:

60.1°F

Tomorrow:

60.9°F

Sunrise:

07:38

Sunset:

18:18

Day Length:

10 h. 40 min.

Cardiff in October

Minimum:

42.8°F

Average:

45.3°F

Maximum:

47.3°F

Sea water temperature in Cardiff today

As of now, in Cardiff, the water temperature is 61.0°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 2.6°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 considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 60.4°F on 2023, while the historical minimum was 56.5°F on 2020.

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 shows a gradual cooling trend. The average temperature is expected to be 60.3°F, the minimum temperature may reach 59.9°F, and the maximum might stay at 60.9°F.

Daily water temperature in Cardiff

Date Current Year

actual* / forecast**

last year 10 years average
Oct 2 64.2°F 59.8°F 61.1°F
Oct 3 64.2°F 59.7°F 61.1°F
Oct 4 63.7°F 59.7°F 60.8°F
Oct 5 62.2°F 59.5°F 60.4°F
Oct 6 61.5°F 58.8°F 60.2°F
Oct 7 61.0°F 58.7°F 60.1°F
Oct 8 62.7°F 58.6°F 60.0°F
Oct 9 61.9°F 59.0°F 59.7°F
Oct 10 62.3°F 58.2°F 59.5°F
Oct 11 61.6°F 58.4°F 59.3°F
Oct 12 61.3°F 58.6°F 59.2°F
Oct 13 60.2°F 58.8°F 58.8°F
Oct 14 60.8°F 58.7°F 58.9°F
Oct 15 60.1°F 58.4°F 58.8°F
Oct 16 61.0°F 58.2°F 58.3°F
Oct 17 60.9°F 58.0°F 58.2°F
Oct 18 60.7°F 57.7°F 58.0°F
Oct 19 60.3°F 57.5°F 57.7°F
Oct 20 60.2°F 57.1°F 57.6°F
Oct 21 60.2°F 57.6°F 57.5°F
Oct 22 60.1°F 56.8°F 57.5°F
Oct 23 59.9°F 56.7°F 57.2°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, 2026, reaching a 71.5°F. While the coldest temperature occurred on March 4, 2018, dipping to 39.0°F. The average readings by season are 45.6°F in Winter, 50.2°F in Spring, 64.7°F in Summer, and 58.4°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Barry 61.6°F 7mi
Newport 60.6°F 11mi
Bristol 59.4°F 25mi
Swansea 61.7°F 34mi

* current water temperature in this city

** straight line distance from Cardiff