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Weather & Climate in Asau, Samoa
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Asau has a warm climate with an average annual temperature of 80°F (27°C). Winters average 79°F in January while summers reach 80°F in July / relatively mild seasonal variation. The area gets 339 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 131.8 inches (wetter than the 38-inch national average). The city sits at an elevation of 43 feet.
Temperature
79°F Jan (26°C)
80°F Jul (26°C)
| Annual Average | 79.9°F |
| 48% above US avg | |
| January Average | 79°F (26°C) |
| July Average | 80°F (26°C) |
| Sunny Days | 339 days/yr |
Geography
| Elevation | 43 ft (13 m) |
| Area | 109.4 sq mi (283.3 km²) |
| Population Density | 61/sq mi |
| Coordinates | -13.5196°N, 172.6378°W |
| Timezone | Pacific/Apia |
Precipitation & Snow
Air Quality
Earthquake History
26 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.4.
| May 3, 1993 | 97 km SW of Gataivai, Samoa | M5.4 | 107 km | 23 km |
| Oct 3, 1995 | 26 km ENE of Samamea, Samoa | M4.9 | 150 km | 38 km |
| Jan 25, 1995 | 148 km SW of Asau, Samoa | M4.9 | 149 km | 33 km |
| Jan 10, 1990 | 41 km NNW of Safotu, Samoa | M4.8 | 42 km | 33 km |
| Jan 11, 2009 | 103 km SSW of Gataivai, Samoa | M4.8 | 120 km | 60 km |
| Nov 20, 2009 | 127 km SSW of Gataivai, Samoa | M4.7 | 143 km | 27 km |
| May 11, 2011 | 84 km WSW of Asau, Samoa | M4.7 | 85 km | 39 km |
| May 9, 2024 | 8 km SE of Samamea, Samoa | M4.7 | 136 km | 10 km |
| Jul 24, 1996 | 115 km SSW of Gataivai, Samoa | M4.7 | 131 km | 33 km |
| Jan 30, 2024 | 96 km S of Gataivai, Samoa | M4.7 | 125 km | 10 km |
| Nov 4, 1990 | 100 km WNW of Asau, Samoa | M4.7 | 100 km | 33 km |
| Apr 17, 2015 | 142 km WSW of Asau, Samoa | M4.6 | 142 km | 10 km |
| Sep 27, 2024 | 39 km NNE of Lufilufi, Samoa | M4.6 | 133 km | 10 km |
| Jul 24, 2008 | 110 km SSW of Gataivai, Samoa | M4.6 | 126 km | 40 km |
| Jun 30, 1997 | 82 km S of Gataivai, Samoa | M4.5 | 113 km | 24 km |
| Aug 23, 2024 | 123 km SW of Gataivai, Samoa | M4.5 | 136 km | 10 km |
| Jun 5, 2022 | 138 km SW of Gataivai, Samoa | M4.5 | 146 km | 10 km |
| Jul 15, 2013 | 83 km SW of Lotofag?, Samoa | M4.4 | 115 km | 10 km |
| Apr 11, 2005 | 131 km SW of Gataivai, Samoa | M4.4 | 139 km | 10 km |
| May 6, 2025 | 133 km SW of Gataivai, Samoa | M4.4 | 141 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
5 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2016 | Amos | Category 2 | 92 mph | 44 km |
| 2005 | Olaf | Category 5 | 132 mph | 149 km |
| 1998 | Ron | Category 5 | 144 mph | 223 km |
| 1992 | Val | Category 4 | 104 mph | 17 km |
| 1987 | Tusi | Category 2 | 75 mph | 298 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.6 m (12 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1907 | MATAVANU VOLCANO | Astronomical | 3.6 m | — | 16 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Savai'i (16 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Savai'i | Shield | 1,858 m (6,096 ft) | 1911 | 16 km |
| Upolu | Shield | 1,100 m (3,609 ft) | Unknown | 109 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 79°F (26°C) | 21.2 in | Wettest |
| February | 74°F (23°C) | 15.8 in | |
| March | 74°F (23°C) | 14.7 in | |
| April | 73°F (23°C) | 11.2 in | |
| May | 73°F (23°C) | 8.8 in | |
| June | 72°F (22°C) | 6.1 in | |
| July | 80°F (26°C) | 5.6 in | Warmest, Driest |
| August | 71°F (22°C) | 6.3 in | Coldest |
| September | 72°F (22°C) | 7.7 in | |
| October | 73°F (23°C) | 12.8 in | |
| November | 73°F (23°C) | 12.8 in | |
| December | 74°F (23°C) | 17.8 in |
Asau has a seasonal temperature swing of 8°F / from 71°F in August to 80°F in July. Total annual precipitation is 140.6 inches, with January being the wettest month (21.2") and July the driest (5.6").