Water temperature in Isle of Bute

This data the coastal Isle of Bute 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.

Current sea temperature in Isle of Bute

Water temperature in Isle of Bute today is 14.5°C. Based on our historical data over a period of ten years, the warmest water in this day in Isle of Bute was recorded in 2023 and was 14.7°C, and the coldest was recorded in 2013 at 12.6°C. Sea water temperature in Isle of Bute is expected to drop to 13.2°C in the next 10 days. September average water temperature in Isle of Bute is 13.7°C, the minimum temperature is 12.1°C, and the maximum is 16.5°C.

Throughout the year, the water temperature in Isle of Bute does not rise above 20°C and therefore is not suitable for comfortable swimming. The average water temperature in Isle of Bute in winter reaches 8.2°C, in spring 8.5°C, in summer the average temperature rises to 13.9°C, and in autumn it is 12.3°C.

Isle of Bute water temperature now

The sea salinity in Isle of Bute is 33.78‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Isle of Bute for today

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 Isle of Bute. 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 Isle of Bute. Data in table shown for 17 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Isle of Bute

Isle of Bute weather forecast

Current temperature and weather

Data in a table show Isle of Bute temperature today (17 September 2025). For more information and forecast for a few days, go to the weather forecast Isle of Bute.

0-3 h	3-6 h	6-9 h	9-12 h
11.5°C	11°C	11.2°C	12°C

12-15 h	15-18 h	18-21 h	21-24 h
13.1°C	15.5°C	14.7°C	13.5°C

Isle of Bute water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Isle of Bute. 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 Isle of Bute 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

Chart monthly average water temperature in Isle of Bute

The nearest beaches and cities from Isle of Bute with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Port Bannatyne	14.5°C	16°C		0.43 m
Largs	14.5°C	15°C		0.57 m
Loch Fyne	13.9°C	15°C		0.23 m
Lochranza	14.4°C	17°C		0.46 m
Port Glasgow	14.4°C	15°C		0.16 m
Seamill	14.5°C	15°C		0.65 m
Saltcoats	14.5°C	15°C		0.7 m
Dumbarton	14.2°C	14°C		0.16 m
Erskine	14.2°C	14°C		0.16 m
Brodick	14.6°C	16°C		0.61 m

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Our report for Isle of Bute is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.