Water temperature in Port Moresby

This data the coastal Port Moresby 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 Port Moresby

Water temperature in Port Moresby today is 27°C. Based on our historical data over a period of ten years, the warmest water in this day in Port Moresby was recorded in 2022 and was 28°C, and the coldest was recorded in 2007 at 25.1°C. Sea water temperature in Port Moresby is expected to drop to 26.1°C in the next 10 days. September average water temperature in Port Moresby is 25.8°C, the minimum temperature is 24.3°C, and the maximum is 29°C.

The swimming season in Port Moresby lasts from January to December, twelve months per year! During those months, Port Moresby water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Port Moresby in winter reaches 26.3°C, in spring 26.7°C, in summer the average temperature rises to 29.5°C, and in autumn it is 28.9°C.

Port Moresby water temperature now

The sea salinity in Port Moresby is 35.07‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Port Moresby 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 Port Moresby. 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 Port Moresby. Data in table shown for 25 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Port Moresby

Port Moresby weather forecast

Current temperature and weather

Data in a table show Port Moresby temperature today (25 September 2025). For more information and forecast for a few days, go to the weather forecast Port Moresby.

0-3 h	3-6 h	6-9 h	9-12 h
24.3°C	24°C	24°C	26.3°C

12-15 h	15-18 h	18-21 h	21-24 h
27.2°C	27.8°C	25.8°C	24.7°C

Port Moresby water temperature by month

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

The nearest beaches and cities from Port Moresby 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
Kerema	27.6°C	26°C		0.96 m
Finschhafen	28.8°C	27°C		0.51 m
Milne Bay	27.4°C	26°C		0.37 m
Samarai	26.8°C	26°C		1.54 m
Daru	27.4°C	26°C		0.93 m
Kandrian	28.8°C	28°C		0.53 m
Madang	29.3°C	29°C		0.46 m
Cape York	26.8°C	29°C		0.7 m
Thursday Island	26.8°C	29°C		0.59 m
Kimbe	30.1°C	29°C		0.08 m

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Our report for Port Moresby 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.