August weather forecast
Port Moresby, Papua New Guinea

The mountains and beautiful clear waters surrounding the beautiful Port Moresby, in Papua New Guinea
The mountains and beautiful clear waters surrounding the beautiful Port Moresby, in Papua New Guinea

Weather in August

August, the last month of the winter in Port Moresby, is also a moderately hot month, with an average temperature ranging between min 22.5°C (72.5°F) and max 27.6°C (81.7°F).

Temperature

July and August, with an average high-temperature of 27.6°C (81.7°F), are the coldest months.

Heat index

The average heat index in August is computed to be a hot 31°C (87.8°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like wind, metabolic differences, differences in body mass, height, and shape, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Port Moresby, the average relative humidity in August is 79%.

Rainfall

In Port Moresby, during 17.1 rainfall days, 71mm (2.8") of precipitation is typically accumulated. In Port Moresby, during the entire year, the rain falls for 249.8 days and collects up to 1311mm (51.61") of precipitation.

Sea temperature

August is the month with the coldest seawater, with an average sea temperature of 25.6°C (78.1°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in August is 11h and 49min.
On the first day of the month, sunrise is at 06:26 and sunset at 18:08. On the last day of August, sunrise is at 06:14 and sunset at 18:09 +10.

Sunshine

In August, the average sunshine is 8.4h.

UV index

February, June through September, with an average maximum UV index of 6, are months with the lowest UV index in Port Moresby. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the coldest month in Port Moresby?

The coldest months are July and August, with an average high-temperature of 27.6°C (81.7°F).

What is the temperature in August in Port Moresby?

In Port Moresby, Papua New Guinea, in August, the average high-temperature is 27.6°C (81.7°F), and the average low-temperature is 22.5°C (72.5°F). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 31°C (87.8°F).

What is the average humidity in August in Port Moresby?

The average relative humidity in August in Port Moresby, Papua New Guinea, is 79%.

How many days does it rain in August in Port Moresby?

In Port Moresby, in August, during 17.1 rainfall days, 71mm (2.8") of precipitation is typically accumulated.

When is the sea coldest in Port Moresby?

With an average sea temperature of 25.6°C (78.1°F), August is the month with the coldest seawater in Port Moresby.

What is the sea water temperature in August in Port Moresby?

In Port Moresby, the average seawater temperature in August is 25.6°C (78.1°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Port Moresby have in August?

In August, the average day length is 11h and 49min.

When is the sunrise / sunset in August in Port Moresby?

In August, on the first day of the month, sunrise is at 06:26 and sunset at 18:08. On the last day of the month, sunrise is at 06:14 and sunset at 18:09 +10.

How long on average sun shines in August in Port Moresby?

The average sunshine duration in August is 8.4h.

When is the lowest UV index in Port Moresby?

February, June through September, with an average maximum UV index of 6, are months with the lowest UV index in Port Moresby.

How high is the UV index in August in Port Moresby?

In Port Moresby, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.

Average temperature in August
Port Moresby, Papua New Guinea

Average temperature in August - Port Moresby, Papua New Guinea
  • Average high temperature in August: 27.6°C

The warmest month (with the highest average high temperature) is December (30.2°C).
The months with the lowest average high temperature are July and August (27.6°C).

  • Average low temperature in August: 22.5°C

The month with the highest average low temperature is December (24.5°C).
The coldest month (with the lowest average low temperature) is August (22.5°C).

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Average pressure in August
Port Moresby, Papua New Guinea

Average pressure in August - Port Moresby, Papua New Guinea
  • Average pressure in August: 1012.1mbar

The month with the highest atmospheric pressure is August (1012.1mbar).
The month with the lowest atmospheric pressure is January (1007.9mbar).

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Average wind speed in August
Port Moresby, Papua New Guinea

Average wind speed in August - Port Moresby, Papua New Guinea
  • Average wind speed in August: 17.8km/h

The windiest month (with the highest average wind speed) is July (18.9km/h).
The calmest month (with the lowest average wind speed) is December (9.7km/h).

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Average humidity in August
Port Moresby, Papua New Guinea

Average humidity in August - Port Moresby, Papua New Guinea
  • Average humidity in August: 79%

The months with the highest relative humidity are May and June (80%).
The months with the lowest relative humidity are January and February (73%).

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Average rainfall in August
Port Moresby, Papua New Guinea

Average rainfall in August - Port Moresby, Papua New Guinea
  • Average rainfall in August: 71mm

The wettest month (with the highest rainfall) is March (203mm).
The driest month (with the least rainfall) is July (46mm).

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Average rainfall days in August
Port Moresby, Papua New Guinea

Average rainfall days in August - Port Moresby, Papua New Guinea
  • Average rainfall days in August: 17.1 days

The month with the highest number of rainy days is March (24.6 days).
The month with the least rainy days is July (14.7 days).

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Average sea temperature in August
Port Moresby, Papua New Guinea

Average sea temperature in August - Port Moresby, Papua New Guinea
  • Average sea temperature in August: 25.6°C

The best month for swimming (with the highest average sea temperature) is January (29.7°C).
The coldest month (with the lowest average sea temperature) is August (25.6°C).

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Average daylight in August /
Average sunshine in August
Port Moresby, Papua New Guinea

Average daylight in August / Average sunshine in August - Port Moresby, Papua New Guinea
  • Average daylight in August: 11h and 49min

The month with the longest days is December (Average daylight: 12h and 40min).
The month with the shortest days is June (Average daylight: 11h and 35min).

  • Average sunshine in August: 8h and 24min

The month with the most sunshine is November (Average sunshine: 11h and 18min).
The month with the least sunshine is May (Average sunshine: 7h and 6min).

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Average sunshine days in August
Port Moresby, Papua New Guinea

Average sunshine days in August - Port Moresby, Papua New Guinea
  • Average sunshine days in August: 11.7 days

The month with the most sunshine days is July (13.4 days).
The months with the least sunshine days are March and April (5.2 days).

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Average UV index in August
Port Moresby, Papua New Guinea

Average UV index in August - Port Moresby, Papua New Guinea
  • Average UV index in August: 6

The months with the highest UV index are January, March, April, May, October, November and December (UV index 7).
The months with the lowest UV index are February, June, July, August and September (UV index 6).

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Average cloud cover in August
Port Moresby, Papua New Guinea

Average cloud cover in August - Port Moresby, Papua New Guinea
  • Average cloud cover in August: 36

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is November (Cloud cover 28).

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Average visibility in August
Port Moresby, Papua New Guinea

Average visibility in August - Port Moresby, Papua New Guinea
  • Average visibility in August: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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