Last updated: August 31, 2025
Experience the tropical charm of Port Moresby in August, where maximum temperatures reach a warm 30°C (86°F) and an inviting average of 25°C (78°F) blankets the city. The nights are pleasantly mild, with a minimum temperature of 21°C (69°F) offering comfort after the day’s warmth. While you might encounter some humidity at 85%, the month brings an average precipitation of 58 mm (2.3 in) spread over approximately 10 days, adding to the lush landscapes. Perfect for those who appreciate subtropical climates, August in Port Moresby promises a blend of warmth, occasional showers, and cultural vibrancy.
In August, Port Moresby, Papua New Guinea, experiences a delightful warmth characterized by mild temperatures. With minimums averaging around 21°C (69°F) and daily highs reaching up to 30°C (86°F), the weather remains comfortable throughout the month. This period marks a slight rise from the cooler temperatures of July, where minimums dropped to 20°C (69°F) and maximums peaked at 30°C (86°F). The average temperature holds steady at 25°C (78°F), reflecting a consistent, tropical climate that is ideal for both outdoor adventures and cultural exploration. As the month progresses, you'll find a gentle transition towards the warmer days of spring, making August a perfect time to embrace the vibrant atmosphere of this coastal city.
In August, Port Moresby experiences a notable shift in precipitation patterns, with rainfall measuring 58 mm (2.3 in) across approximately 10 days. This slight increase from July's meager 45 mm (1.8 in) is indicative of the city's transition towards the wetter months, although it marks one of the lower totals compared to earlier in the year. Throughout the wetter months, heightened rainfall typically reemerges, as seen in trends from previous months—most notably the 307 mm (12.1 in) recorded in March. As August progresses toward September, residents can expect a gradual uptick in precipitation as the weather remains dynamic, signaling the onset of the rainy season that peaks later in the year.
In August, Port Moresby experiences a slight dip in humidity, averaging 85%, which marks a transition towards the cooler and drier months. This month, while still relatively humid, is notably lower compared to the peak levels observed from April to July, where humidity reached as high as 88%. Following this pattern, the city begins to shift towards a more comfortable climate, paving the way for September's even lower humidity of 80%. With a consistent trend of high humidity in the first half of the year, August stands out as a pivotal moment where residents can anticipate a gradual relief from the tropical mugginess, hinting at the arrival of more pleasant conditions ahead.
In August, Port Moresby experiences a UV Index of 13, which falls under the extreme exposure category, highlighting the city's persistent vulnerability to harmful UV rays. This trend of extreme UV levels is consistent throughout the year, with months like January and February peaking at 16. Notably, even as the index slightly dips, the recommended burn time remains a brief 10 minutes, emphasizing the need for sun protection. As the city transitions towards the end of winter, the intensity of solar radiation remains high, reminding residents and visitors alike to stay vigilant against the sun's powerful rays. For more detailed information, check out the Port Moresby UV Index.
UV Risk Categories
August in Port Moresby, Papua New Guinea, shines brightly with 289 hours of sunshine, marking it as one of the sunniest months of the year. The trend reveals a steady increase in sunshine hours as the year progresses, reaching a peak in the latter half. From January's modest 212 hours, the city experiences a significant rise, culminating in a remarkable 297 hours in December. This progressive uptick highlights the vibrant energy of Port Moresby, where the sun seems to linger longer as the year wanes, promising more warm, sun-soaked days ahead for residents and visitors alike.
In Port Moresby, Papua New Guinea, the likelihood of sunny weather in August stands at 27%, marking a notable shift as the region transitions from the cooler months of July, which enjoys a 35% chance of sun. This upward trend in sunshine opportunities begins in May and peaks in November, making the mid-year months a more favorable time for sun-seekers. Despite August's relatively lower chances compared to the preceding months, it offers a pleasant reprieve before the rainy season sets in, making it an ideal time for outdoor activities and exploration. As visitors plan their August adventures, they can relish the possibilities of sunshine against the backdrop of this vibrant city.
In Port Moresby, Papua New Guinea, the daylight duration follows a subtle yet telling pattern throughout the year. From January to March, the city enjoys a consistent 12 hours of sunlight daily, embracing the vibrant energy that this ample light brings. However, as April rolls in, daylight begins to wane slightly, dipping to 11 hours and remaining at this level through August. This transitional period signals a gentle shift towards shorter days, as the city finds itself in the midst of its cooler season. Interestingly, as September approaches, daylight duration bounces back, returning to 12 hours, heralding a gradual return to longer days as the year progresses towards its end. Overall, the rhythm of daylight in Port Moresby reflects a stable yet dynamic interplay between light and seasonal change.
In August, Port Moresby experiences a notable uptick in its average wind speed, reaching 4.2 m/s (9 mph), suggesting a shift towards breezier conditions as the year progresses. This marks a continuation of the increasing wind speeds observed from the calmer months of earlier in the year; May and June both offered a moderate breeze at 4.1 m/s (9 mph) and 3.6 m/s (8 mph) respectively. After August, wind speeds climb further to 5.0 m/s (11 mph) in September, indicating a seasonal trend where late winter transitions into a windier spring. This dynamic shift towards stronger winds not only enhances the coastal ambiance of Port Moresby but also implies a season ripe for outdoor activities and exploration of its stunning natural landscape.
Weather in Port Moresby varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Port Moresby, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in August and January, significant differences emerge. August tends to be milder, with temperatures ranging from a minimum of 21°C (69°F) to a maximum of 30°C (86°F), and an average temperature of 25°C (78°F). The month experiences about 58 mm (2.3 in) of precipitation over 10 days, coupled with relatively high humidity at 85%.
In contrast, January is warmer and wetter, featuring a minimum temperature of 23°C (74°F) and peaking at 33°C (91°F), with an average of 27°C (81°F). Precipitation soars to 276 mm (10.9 in) across 22 days, and the humidity remains fairly consistent at 83%. These conditions can be further explored with detailed information available at Port Moresby weather in January.
When comparing the weather in August and February, we observe notable differences in temperature and precipitation. August features milder temperatures, with an average of 25°C (78°F) and maximums reaching 30°C (86°F), accompanied by 58 mm (2.3 in) of precipitation over about 10 days. In contrast, February experiences warmer conditions, with an average high of 33°C (91°F) and a greater precipitation total of 200 mm (7.9 in) spread across 21 days. Although humidity levels are similar, February tends to be more humid and wetter overall. For more detailed information, you can visit Port Moresby weather in February.
Comparing the weather in August and March reveals some notable differences. August tends to be milder, with temperatures ranging from a minimum of 21°C (69°F) to a maximum of 30°C (86°F) and an average of 25°C (78°F). Rainfall is relatively low in August, with about 58 mm (2.3 in) over 10 days and humidity at 85%.
In contrast, March is warmer and wetter, with average temperatures between a minimum of 23°C (74°F) and a maximum of 32°C (89°F), averaging at 27°C (80°F). The month experiences significantly higher precipitation, totaling 307 mm (12.1 in) over 28 days, and humidity levels remain similar at 84%. For more detailed information, check out Port Moresby weather in March.
When comparing the weather in August and April, we see distinct differences in temperature and precipitation patterns. In August, the temperatures range from a minimum of 21°C (69°F) to a maximum of 30°C (86°F), with an average temperature of 25°C (78°F). Precipitation in August is relatively low at 58 mm (2.3 in) over approximately 10 days, and humidity stands at 85%. In contrast, April exhibits slightly warmer conditions with a minimum of 22°C (72°F) and a maximum of 31°C (88°F), resulting in an average of 26°C (80°F). However, April is significantly wetter, receiving 215 mm (8.5 in) of rain over 24 days, accompanied by very similar humidity levels at 86%. This demonstrates that while both months are warm and humid, April is notably wetter than August. For more detailed information on the April weather, you can visit Port Moresby weather in April.
When comparing the weather in August and May, it’s evident that both months experience warm temperatures, but May tends to be slightly warmer overall. In May, the minimum temperature is 22°C (72°F) with an average of 26°C (80°F) and a maximum of 31°C (89°F). In contrast, August has a minimum temperature of 21°C (69°F) and averages 25°C (78°F), peaking at 30°C (86°F). Additionally, May experiences higher precipitation levels, with 95 mm (3.8 in) of rain over approximately 13 days, compared to August's 58 mm (2.3 in) during about 10 days of rainfall. Both months have high humidity, with May slightly higher at 88% compared to August's 85%. For a more detailed look at the weather in May, you can check out Port Moresby weather in May.
In comparing the weather between June and August, we see that both months feature similar temperature ranges, with minimum temperatures around 21°C (69°F) and maximums reaching 30°C (86°F). June tends to be slightly warmer overall, with an average temperature of 26°C (79°F), compared to August's average of 25°C (78°F). Precipitation levels are also comparable; June receives about 63 mm (2.5 in) over 9 days, while August sees slightly less rainfall at 58 mm (2.3 in) over 10 days. Humidity is quite high in both months, with June at 88% and August at 85%. For more detailed information, check out Port Moresby weather in June.
Comparing the weather in August and July reveals some similarities and slight differences. Both months share an average temperature of 25°C (78°F) and experience the same maximum of 30°C (86°F). However, August has a slightly higher minimum temperature at 21°C (69°F) compared to July's 20°C (69°F). In terms of rainfall, August sees increased precipitation, totaling 58 mm (2.3 in) over 10 days, while July has less with 45 mm (1.8 in) across 8 days. Humidity levels are also quite similar, with August at 85% and July slightly higher at 87%. For more detailed information on July weather, you can check Port Moresby weather in July.
In August, temperatures in Port Moresby typically range from a minimum of 21°C (69°F) to a maximum of 30°C (86°F), with an average temperature of 25°C (78°F). The month experiences about 58 mm (2.3 in) of precipitation over 10 days and maintains a high humidity level of 85%.
Conversely, September shows a slight cooling trend, with minimum temperatures dropping to 19°C (66°F), while the maximum remains at 30°C (87°F), keeping the average temperature steady at 25°C (78°F). Rainfall increases to 81 mm (3.2 in) over 11 days, and humidity decreases slightly to 80%. For a more detailed view of the weather in September, you can check Port Moresby weather in September.
In comparing the weather of August and October, we see a slight increase in average temperature, with October averaging 26°C (79°F) compared to August's 25°C (78°F). The maximum temperatures also rise in October, reaching up to 31°C (88°F), while August peaks at 30°C (86°F). However, October experiences significantly more rainfall, with 119 mm (4.7 in) over 17 days, compared to August's 58 mm (2.3 in) over just 10 days. Additionally, October maintains lower humidity levels at 81%, compared to August's 85%. For more detailed insights, you can check out Port Moresby weather in October.
August and November present contrasting weather patterns. In August, temperatures range from a minimum of 21°C (69°F) to a maximum of 30°C (86°F), with an average of 25°C (78°F). The month experiences relatively lower precipitation, with about 58 mm (2.3 in) over 10 days, and humidity levels are quite high at 85%.
In contrast, November sees slightly warmer conditions, with temperatures varying from 21°C (69°F) to a maximum of 33°C (91°F), averaging 27°C (80°F). However, this month is also wetter, receiving 130 mm (5.1 in) of rain over 17 days, and humidity drops slightly to 81%. For more details, check out Port Moresby weather in November.
In August, the weather is generally warm with temperatures ranging from a minimum of 21°C (69°F) to a maximum of 30°C (86°F), and an average of 25°C (78°F). August experiences moderate rainfall, totaling 58 mm (2.3 in) over about 10 days, accompanied by high humidity levels of 85%.
In contrast, December sees slightly warmer conditions, with temperatures ranging from 23°C (73°F) to 33°C (93°F), averaging 27°C (81°F). However, December is distinctly wetter, receiving 169 mm (6.7 in) of precipitation spread across 22 days, while humidity remains relatively stable at 83%. For more detailed information, visit Port Moresby weather in December.
As August rolls in, Port Moresby's weather showcases a pleasant blend of warmth and gentle humidity, offering a respite from the rainier months. Unlike the peak of the wet season, August maintains a moderate temperature, making it an inviting time for outdoor activities despite experiencing some rainfall across about 10 days. With humidity levels around 85%, visitors can expect a tropical feel, but the rain is typically light, allowing for a comfortable atmosphere. For those looking to explore the unique climate patterns of the region, detailed insights can be found at Port Moresby Climate.