Water temperature in Alphonse Island

This data the coastal Alphonse Island 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 Alphonse Island

Water temperature in Alphonse Island today is 26.6°C. Based on our historical data over a period of ten years, the warmest water in this day in the Indian Ocean near Alphonse Island was recorded in 2015 and was 28.6°C, and the coldest was recorded in 2010 at 26.4°C. Sea water temperature in Alphonse Island is expected to rise to 27.8°C in the next 10 days. September average water temperature in Alphonse Island is 27°C, the minimum temperature is 25.4°C, and the maximum is 29°C.

The swimming season in Alphonse Island lasts from January to December, twelve months per year! During those months, Alphonse Island water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Alphonse Island in winter reaches 28.5°C, in spring 29.6°C, in summer the average temperature rises to 26.7°C, and in autumn it is 27.8°C.

Alphonse Island water temperature now

The sea salinity in Alphonse Island is 34.38‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Alphonse Island 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 Alphonse Island. 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 Alphonse Island. Data in table shown for 28 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Alphonse Island

Alphonse Island weather forecast

Current temperature and weather

Data in a table show Alphonse Island temperature today (28 September 2025). For more information and forecast for a few days, go to the weather forecast Alphonse Island.

0-3 h	3-6 h	6-9 h	9-12 h
25.4°C	25.4°C	25.5°C	25.6°C

12-15 h	15-18 h	18-21 h	21-24 h
25.7°C	25.8°C	25.7°C	25.5°C

Alphonse Island water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Alphonse Island. 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 Alphonse Island 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 Alphonse Island

The nearest beaches and cities from Alphonse Island 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
Island Cerf	26.6°C	26°C		1.02 m
Round Island	26.6°C	26°C		1.02 m
North Island	26.6°C	26°C		1.02 m
Cousin Island	26.6°C	26°C		1.02 m
Denis Island	26.6°C	26°C		1.02 m
Bird Island	26.6°C	26°C		1.02 m
Desroches Island	26.6°C	26°C		1.02 m
Frigate Island	26.6°C	26°C		1.02 m
Silhouette Island	26.6°C	26°C		1.02 m
Sainte Anne Island	26.6°C	26°C		1.02 m

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Our report for Alphonse Island 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.