This data the coastal Mayo 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 Mayo today is 29.7°C. Based on our historical data over a period of ten years, the warmest water in this day in Mayo was recorded in 2024 and was 30.2°C, and the coldest was recorded in 2019 at 29°C. Sea water temperature in Mayo is expected to drop to 29.4°C in the next 10 days. September average water temperature in Mayo is 29.4°C, the minimum temperature is 28.4°C, and the maximum is 30.8°C.
The swimming season in Mayo lasts from January to December, twelve months per year! During those months, Mayo water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Mayo in winter reaches 28.4°C, in spring 28.8°C, in summer the average temperature rises to 29.5°C, and in autumn it is 29.3°C.
6 September 2025 |
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today temp |
29.7°C |
5 September 2025 |
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yesterday temp |
29.8°C |
The sea salinity in Mayo is 34.11‰, 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 Mayo. 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 Mayo. 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 |
---|---|---|---|
1' 5" | 1' 5" | 1' 5" | 1' 5" |
0.44 m | 0.43 m | 0.43 m | 0.43 m |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
1' 5" | 1' 6" | 1' 6" | 1' 6" |
0.44 m | 0.45 m | 0.46 m | 0.46 m |
Data in a table show Mayo temperature today (6 September 2025). For more information and forecast for a few days, go to the weather forecast Mayo.
0-3 h | 3-6 h | 6-9 h | 9-12 h |
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![]() | ![]() | ![]() | ![]() |
24°C | 23.7°C | 23.9°C | 28.7°C |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
![]() | ![]() | ![]() | ![]() |
29.8°C | 29.3°C | 25.4°C | 24.9°C |
You may also be interested in other sections of our site for Mayo: Sunrise and Sunset, Tides
These figures shows the average, minimum and maximum monthly sea temperature in Mayo. 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 Mayo 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 | |
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January | 28.3°C | 26.8°C | 29.4°C | hot |
Sea water temperature in Mayo in January | ||||
February | 28°C | 26.5°C | 29.1°C | hot |
Sea water temperature in Mayo in February | ||||
March | 28.2°C | 26.8°C | 29.4°C | hot |
Sea water temperature in Mayo in March | ||||
April | 28.8°C | 27.5°C | 29.7°C | hot |
Sea water temperature in Mayo in April | ||||
May | 29.4°C | 28.4°C | 30.6°C | hot |
Sea water temperature in Mayo in May | ||||
June | 29.6°C | 28.4°C | 30.6°C | hot |
Sea water temperature in Mayo in June | ||||
July | 29.5°C | 27.9°C | 30.4°C | hot |
Sea water temperature in Mayo in July | ||||
August | 29.4°C | 27.9°C | 30.4°C | hot |
Sea water temperature in Mayo in August | ||||
September | 29.4°C | 28.4°C | 30.8°C | hot |
Sea water temperature in Mayo in September | ||||
October | 29.4°C | 28.1°C | 30.6°C | hot |
Sea water temperature in Mayo in October | ||||
November | 29.2°C | 27.9°C | 30.1°C | hot |
Sea water temperature in Mayo in November | ||||
December | 28.8°C | 27.1°C | 29.9°C | hot |
Sea water temperature in Mayo in December |