All data are in degrees Fahrenheit

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Water temperature in Port Moresby

Detailed information about the current water temperature in Port Moresby. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Port Moresby now

80.9

°F

May 25, 23:10

Trend:

decreasing

Yesterday:

81.6°F

Tomorrow:

80.8°F

Sunrise:

06:19

Sunset:

17:57

Day Length:

11 h. 38 min.

Port Moresby in June

Minimum:

83.7°F

Average:

85.4°F

Maximum:

86.5°F

Sea water temperature in Port Moresby today

As of now, in Port Moresby, the water temperature is 80.9°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.1°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 84.1°F on 2025, while the historical minimum was 82.3°F on 2021.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 80.3°F, the minimum temperature may reach 79.8°F, and the maximum might stay at 80.8°F.

Daily water temperature in Port Moresby

Date Current Year

actual* / forecast**

last year 10 years average
May 11 82.9°F 84.4°F 83.2°F
May 12 83.3°F 84.6°F 83.4°F
May 13 82.9°F 84.3°F 83.3°F
May 14 82.8°F 84.0°F 83.3°F
May 15 82.6°F 84.3°F 83.2°F
May 16 82.8°F 84.2°F 83.3°F
May 17 83.1°F 84.1°F 83.3°F
May 18 83.1°F 83.8°F 83.3°F
May 19 82.7°F 83.8°F 83.4°F
May 20 82.5°F 84.1°F 83.4°F
May 21 82.4°F 83.8°F 83.2°F
May 22 82.2°F 83.5°F 83.2°F
May 23 82.0°F 83.4°F 83.2°F
May 24 81.6°F 84.3°F 83.2°F
May 25 80.9°F 84.1°F 83.0°F
May 26 80.8°F 84.3°F 82.9°F
May 27 80.7°F 84.1°F 82.8°F
May 28 80.6°F 84.4°F 82.7°F
May 29 80.3°F 83.6°F 82.4°F
May 30 80.1°F 82.9°F 82.2°F
May 31 80.0°F 82.7°F 82.1°F
Jun 1 79.8°F 83.1°F 81.9°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Port Moresby by month

In Port Moresby, the water temperature is comfortable for swimming all year round.
The warmest water in Port Moresby was recorded on March 17, 2016, reaching a 88.7°F. While the coldest temperature occurred on September 9, 2019, dipping to 76.8°F. The average readings by season are 85.4°F in Winter, 84.6°F in Spring, 80.0°F in Summer, and 81.1°F in Autumn.