This data the coastal Clachtoll sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Water temperature in Clachtoll today is 14.3°C. Based on our historical data over a period of ten years, the warmest water in this day in Clachtoll was recorded in 2023 and was 13.9°C, and the coldest was recorded in 2015 at 12.4°C. Sea water temperature in Clachtoll is expected to drop to 13°C in the next 10 days. September average water temperature in Clachtoll is 13°C, the minimum temperature is 12°C, and the maximum is 15.1°C.
Throughout the year, the water temperature in Clachtoll does not rise above 20°C and therefore is not suitable for comfortable swimming. The average water temperature in Clachtoll in winter reaches 8.7°C, in spring 8.2°C, in summer the average temperature rises to 12.6°C, and in autumn it is 12.1°C.
5 September 2025 |
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today temp |
14.3°C |
4 September 2025 |
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yesterday temp |
14.1°C |
The sea salinity in Clachtoll is 34.00‰, and the average salinity of the World Ocean is 35‰.
Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Clachtoll. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Clachtoll. Data in table shown for 6 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
0-3 h | 3-6 h | 6-9 h | 9-12 h |
---|---|---|---|
2' 9" | 2' 9" | 2' 11" | 3' 1" |
0.83 m | 0.84 m | 0.88 m | 0.95 m |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
3' 5" | 3' 6" | 3' 6" | 3' 3" |
1.04 m | 1.06 m | 1.07 m | 0.99 m |
Data in a table show Clachtoll temperature today (6 September 2025). For more information and forecast for a few days, go to the weather forecast Clachtoll.
0-3 h | 3-6 h | 6-9 h | 9-12 h |
---|---|---|---|
![]() | ![]() | ![]() | ![]() |
11.9°C | 11.8°C | 11.7°C | 13.2°C |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
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14.2°C | 14.6°C | 14.1°C | 13°C |
You may also be interested in other sections of our site for Clachtoll: Sunrise and Sunset, Tides
These figures shows the average, minimum and maximum monthly sea temperature in Clachtoll. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Clachtoll on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
Month | Avr | Min | Max | |
---|---|---|---|---|
January | 8.6°C | 7.5°C | 10°C | cold |
Sea water temperature in Clachtoll in January | ||||
February | 7.7°C | 6.6°C | 9°C | cold |
Sea water temperature in Clachtoll in February | ||||
March | 7.3°C | 6.1°C | 8.5°C | cold |
Sea water temperature in Clachtoll in March | ||||
April | 7.9°C | 6.3°C | 9.7°C | cold |
Sea water temperature in Clachtoll in April | ||||
May | 9.3°C | 7.4°C | 11.4°C | cold |
Sea water temperature in Clachtoll in May | ||||
June | 11.3°C | 9.1°C | 14°C | cold |
Sea water temperature in Clachtoll in June | ||||
July | 13°C | 11°C | 15.8°C | cold |
Sea water temperature in Clachtoll in July | ||||
August | 13.4°C | 12.3°C | 15.3°C | cold |
Sea water temperature in Clachtoll in August | ||||
September | 13°C | 12°C | 15.1°C | cold |
Sea water temperature in Clachtoll in September | ||||
October | 12.1°C | 10.9°C | 13.3°C | cold |
Sea water temperature in Clachtoll in October | ||||
November | 11.1°C | 9.5°C | 12.3°C | cold |
Sea water temperature in Clachtoll in November | ||||
December | 9.8°C | 8.1°C | 11.2°C | cold |
Sea water temperature in Clachtoll in December |