Water temperature in Portobello

This data the coastal Portobello 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 Portobello

Water temperature in Portobello today is 10.7°C. Based on our historical data over a period of ten years, the warmest water in this day in Portobello was recorded in 2013 and was 11.1°C, and the coldest was recorded in 2008 at 8.7°C. Sea water temperature in Portobello is expected to drop to 10.2°C in the next 10 days. September average water temperature in Portobello is 10.3°C, the minimum temperature is 8.7°C, and the maximum is 11.9°C.

Throughout the year, the water temperature in Portobello does not rise above 20°C and therefore is not suitable for comfortable swimming. The average water temperature in Portobello in winter reaches 10.2°C, in spring 11.2°C, in summer the average temperature rises to 14.4°C, and in autumn it is 13.3°C.

Portobello water temperature now

The sea salinity in Portobello is 34.52‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Portobello 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 Portobello. 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 Portobello. Data in table shown for 5 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Portobello

Portobello weather forecast

Current temperature and weather

Data in a table show Portobello temperature today (5 September 2025). For more information and forecast for a few days, go to the weather forecast Portobello.

0-3 h	3-6 h	6-9 h	9-12 h
9.3°C	8.1°C	8.6°C	10.2°C

12-15 h	15-18 h	18-21 h	21-24 h
13.7°C	12°C	8.6°C	7.1°C

Portobello water temperature by month

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

The nearest beaches and cities from Portobello 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 Chalmers	10.3°C	13°C		0.9 m
Tomahawk Beach	10.6°C	12°C		1.08 m
Timaru	10.2°C	14°C		0.65 m
Invercargill	10.5°C	8°C		2.36 m
Bluff	10.8°C	8°C		2.9 m
Riverton	10.8°C	8°C		3.19 m
Pahia	11.2°C	8°C		3.92 m
Stewart Island	11.9°C	8°C		3.96 m
Milford Sound	12.5°C	-1°C		3.53 m
Jackson Bay	12.8°C	10°C		3.44 m

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Our report for Portobello 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.