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Weather & Climate in Wewak, Papua New Guinea
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Wewak has a warm climate with an average annual temperature of 79°F (26°C). Winters average 79°F in January while summers reach 78°F in July / relatively mild seasonal variation. The area gets 196 sunny days per year. Annual precipitation totals 77.3 inches (wetter than the 38-inch national average). The city sits at an elevation of 144 feet.
Temperature
79°F Jan (26°C)
78°F Jul (26°C)
| Annual Average | 79.0°F |
| 46% above US avg | |
| January Average | 79°F (26°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 196 days/yr |
Geography
| Elevation | 144 ft (44 m) |
| Area | 317.9 sq mi (823.3 km²) |
| Population Density | 57/sq mi |
| Coordinates | -3.5496°N, 143.6323°W |
| Timezone | Pacific/Port_Moresby |
Precipitation & Snow
Air Quality
Earthquake History
811 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.6.
| Sep 8, 2002 | 68 km ESE of Aitape, Papua New Guinea | M7.6 | 81 km | 13 km |
| Apr 2, 2023 | 40 km ESE of Ambunti, Papua New Guinea | M7.0 | 100 km | 70 km |
| Mar 23, 2024 | 36 km ENE of Ambunti, Papua New Guinea | M6.9 | 85 km | 41 km |
| Jan 10, 2002 | 11 km SE of Aitape, Papua New Guinea | M6.7 | 139 km | 11 km |
| Aug 29, 1997 | 64 km NNE of Angoram, Papua New Guinea | M6.6 | 81 km | 23 km |
| Apr 16, 2013 | 23 km ESE of Aitape, Papua New Guinea | M6.6 | 127 km | 13 km |
| Jul 31, 2011 | 103 km NE of Angoram, Papua New Guinea | M6.6 | 133 km | 10 km |
| May 20, 2025 | 89 km ENE of Angoram, Papua New Guinea | M6.5 | 133 km | 17 km |
| Jun 7, 1990 | 68 km NE of Angoram, Papua New Guinea | M6.5 | 89 km | 29 km |
| Nov 7, 2017 | 67 km WSW of Angoram, Papua New Guinea | M6.5 | 79 km | 111 km |
| May 17, 1991 | 22 km SSW of Ambunti, Papua New Guinea | M6.4 | 138 km | 59 km |
| Apr 1, 2009 | 52 km E of Wewak, Papua New Guinea | M6.4 | 52 km | 10 km |
| Sep 16, 2002 | 41 km ESE of Aitape, Papua New Guinea | M6.3 | 109 km | 10 km |
| Feb 13, 1999 | 101 km ENE of Angoram, Papua New Guinea | M6.2 | 133 km | 10 km |
| Sep 5, 2024 | 59 km NNE of Angoram, Papua New Guinea | M6.2 | 63 km | 7 km |
| Oct 7, 2001 | 67 km ESE of Aitape, Papua New Guinea | M6.2 | 83 km | 10 km |
| Feb 12, 2003 | 49 km NNE of Angoram, Papua New Guinea | M6.2 | 69 km | 10 km |
| Apr 1, 2016 | 119 km NE of Angoram, Papua New Guinea | M6.2 | 141 km | 6 km |
| May 22, 1992 | 63 km NNE of Angoram, Papua New Guinea | M6.2 | 66 km | 33 km |
| Mar 24, 2006 | 63 km WNW of Wewak, Papua New Guinea | M6.1 | 64 km | 12 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 15.0 m (49 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1998 | PAPUA NEW GUINEA | Eruption + Earthquake | 15.0 m | 1,636 | 135 km |
| 2002 | BISMARCK SEA | Earthquake | 5.5 m | 4 | 83 km |
| 2018 | KADOVAR ISLAND, PAPUA NEW GUINEA | Astronomical | 1.0 m | — | 106 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
1 volcano within 200 km. Closest: Manam (167 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Manam | Stratovolcano | 1,807 m (5,928 ft) | 2020 | 167 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 79°F (26°C) | 6.0 in | |
| February | 79°F (26°C) | 6.0 in | |
| March | 79°F (26°C) | 7.0 in | |
| April | 79°F (26°C) | 7.3 in | |
| May | 80°F (26°C) | 6.9 in | Warmest |
| June | 79°F (26°C) | 5.4 in | |
| July | 78°F (26°C) | 5.3 in | Coldest, Driest |
| August | 79°F (26°C) | 5.4 in | |
| September | 79°F (26°C) | 5.4 in | |
| October | 79°F (26°C) | 7.6 in | |
| November | 79°F (26°C) | 8.1 in | Wettest |
| December | 79°F (26°C) | 7.1 in |
Wewak has a seasonal temperature swing of 1°F / from 78°F in July to 80°F in May. Total annual precipitation is 77.3 inches, with November being the wettest month (8.1") and July the driest (5.3").