All Countries
Weather & Climate in Alotau, Papua New Guinea
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Alotau has a warm climate with an average annual temperature of 77°F (25°C). Winters average 79°F in January while summers reach 74°F in July / relatively mild seasonal variation. The area gets 130 sunny days per year, below the national average of 205. Annual precipitation totals 113.8 inches (wetter than the 38-inch national average). The city sits at an elevation of 36 feet.
Temperature
79°F Jan (26°C)
74°F Jul (23°C)
| Annual Average | 76.8°F |
| 42% above US avg | |
| January Average | 79°F (26°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 130 days/yr |
Geography
| Elevation | 36 ft (11 m) |
| Area | 313.3 sq mi (811.6 km²) |
| Population Density | 32/sq mi |
| Coordinates | -10.3151°N, 150.4574°W |
| Timezone | Pacific/Port_Moresby |
Precipitation & Snow
Air Quality
Earthquake History
97 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.1.
| May 22, 1995 | 135 km ENE of Alotau, Papua New Guinea | M6.1 | 136 km | 30 km |
| Jun 23, 2022 | 115 km NW of Alotau, Papua New Guinea | M5.5 | 115 km | 10 km |
| Mar 11, 1999 | 131 km NNW of Alotau, Papua New Guinea | M5.4 | 132 km | 33 km |
| Apr 9, 2010 | 103 km NW of Alotau, Papua New Guinea | M5.4 | 104 km | 37 km |
| May 5, 1992 | 138 km NE of Samarai, Papua New Guinea | M5.4 | 144 km | 33 km |
| May 21, 2008 | 60 km NE of Alotau, Papua New Guinea | M5.4 | 60 km | 39 km |
| Apr 16, 1999 | 97 km NNE of Alotau, Papua New Guinea | M5.4 | 98 km | 33 km |
| Aug 5, 1994 | 122 km NNW of Alotau, Papua New Guinea | M5.3 | 123 km | 39 km |
| Oct 7, 2013 | 137 km ENE of Samarai, Papua New Guinea | M5.3 | 149 km | 35 km |
| May 15, 2015 | 65 km N of Alotau, Papua New Guinea | M5.3 | 66 km | 10 km |
| Feb 26, 1990 | 109 km NW of Alotau, Papua New Guinea | M5.2 | 109 km | 33 km |
| May 21, 2008 | 64 km NE of Alotau, Papua New Guinea | M5.2 | 65 km | 36 km |
| Sep 18, 2019 | 55 km NNW of Alotau, Papua New Guinea | M5.1 | 56 km | 10 km |
| Feb 23, 2019 | 80 km NW of Alotau, Papua New Guinea | M5.1 | 80 km | 10 km |
| Apr 17, 2019 | 94 km NNE of Alotau, Papua New Guinea | M5.1 | 95 km | 8 km |
| Apr 17, 2019 | 113 km NNE of Alotau, Papua New Guinea | M5.0 | 113 km | 10 km |
| Jan 16, 2020 | 95 km NE of Alotau, Papua New Guinea | M5.0 | 96 km | 10 km |
| Sep 13, 1991 | 76 km NW of Alotau, Papua New Guinea | M5.0 | 76 km | 28 km |
| Jun 20, 2007 | 122 km N of Alotau, Papua New Guinea | M4.9 | 123 km | 43 km |
| Sep 4, 2010 | 132 km N of Alotau, Papua New Guinea | M4.9 | 133 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
2 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2026 | Narelle | Category 2 | — | 291 km |
| 2014 | Ita | Category 3 | 104 mph | 110 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Iamalele (89 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Iamalele | Lava dome(s) | 200 m (656 ft) | Unknown | 89 km |
| Dawson Strait Group | Volcanic field | 500 m (1,640 ft) | 1350 | 90 km |
| Goodenough | Volcanic field | 220 m (722 ft) | Unknown | 94 km |
| Victory | Stratovolcano | 1,925 m (6,316 ft) | 1935 | 196 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 79°F (26°C) | 9.1 in | |
| February | 79°F (26°C) | 8.9 in | Warmest |
| March | 78°F (26°C) | 9.8 in | |
| April | 77°F (25°C) | 11.9 in | Wettest |
| May | 77°F (25°C) | 10.4 in | |
| June | 75°F (24°C) | 11.0 in | |
| July | 74°F (23°C) | 11.1 in | Coldest |
| August | 74°F (24°C) | 9.2 in | |
| September | 75°F (24°C) | 9.1 in | |
| October | 77°F (25°C) | 9.6 in | |
| November | 78°F (25°C) | 6.0 in | Driest |
| December | 79°F (26°C) | 7.6 in |
Alotau has a seasonal temperature swing of 5°F / from 74°F in July to 79°F in February. Total annual precipitation is 113.8 inches, with April being the wettest month (11.9") and November the driest (6.0").