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Si’umu, Samoa
Tuamasaga · Samoa
Si’umu is a small town in Tuamasaga, Samoa with a population of 1,183. Elevation: 69 ft (21 m). Average temperature: 80°F (27°C).
Data updated June 2026
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About Si’umu
Si’umu is a village on the central south coast of Upolu island in Samoa. The population is 1183. There is also a sub-village Siumu Uta which has a population of 304.
People
Climate
| Population | 1,183 |
| Population Density | 25 / sq mi |
| Elevation | 69 ft (21 m) |
| Coordinates | -14.0094°, -171.7768° |
| Timezone | Pacific/Apia |
| Country | 🇼🇸 Samoa |
| State / Province | Tuamasaga |
| Average Temperature | 80°F (27°C) |
| January Average | 80°F (27°C) |
| July Average | 79°F (26°C) |
| Annual Precipitation | 92.0 inches (2,336 mm) |
| Annual Snowfall | 0.0 inches (0 cm) |
About Si’umu
Si’umu is a small town in Samoa (Tuamasaga) with a population of 1,183. The city sits at an elevation of 69 feet (21 meters) above sea level. The average annual temperature is 80°F (27°C). Temperatures range from 80°F in January to 79°F in July. Annual precipitation averages 92.0 inches. The timezone is Pacific/Apia.
Climate in Si’umu
Si’umu has an average annual temperature of 0°C (32°F). The hottest month is Jan (0°C), the coldest is Jan (0°C). Average annual precipitation is 2932 mm.
Temperature
| Annual Average | 79.9°F |
| 48% above Samoa avg | |
| January Average | 80°F (27°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 343 days/yr |
Geography
| Elevation | 69 ft (21 m) |
| Area | 47.8 sq mi (123.8 km²) |
| Population Density | 25/sq mi |
| Coordinates | -14.0094°N, 171.7768°W |
| Timezone | Pacific/Apia |
Precipitation & Snow
Air Quality
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 | — | 92 km |
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Upolu (10 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Upolu | Shield | 1,100 m (3,609 ft) | Unknown | 10 km |
| Savai'i | Shield | 1,858 m (6,096 ft) | 1911 | 92 km |
| Tutuila | Tuff cone(s) | 653 m (2,142 ft) | 440 | 120 km |
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 80°F (27°C) | 17.2 in | Wettest |
| February | 80°F (27°C) | 13.7 in | Warmest |
| March | 80°F (27°C) | 13.2 in | |
| April | 80°F (26°C) | 9.3 in | |
| May | 79°F (26°C) | 9.6 in | |
| June | 78°F (26°C) | 6.7 in | Driest |
| July | 79°F (26°C) | 7.2 in | |
| August | 77°F (25°C) | 6.8 in | Coldest |
| September | 78°F (25°C) | 7.8 in | |
| October | 78°F (26°C) | 13.0 in | |
| November | 79°F (26°C) | 10.8 in | |
| December | 80°F (26°C) | 14.5 in |
Si’umu has a seasonal temperature swing of 3°F / from 77°F in August to 80°F in February. Total annual precipitation is 129.6 inches, with January being the wettest month (17.2") and June the driest (6.7").
Schools in Si’umu
4 public schools (NCES 2022-23 data).
| School | Level | Enrollment | Teachers | Student/Teacher |
|---|---|---|---|---|
| Mulivai Primary School | — | — | — | — |
| Palalaua College | — | — | — | — |
| Si'umu Primary School | — | — | — | — |
| Tafitoala Primary School | — | — | — | — |
Museums in Si’umu
| Name | Type | Address | Phone | Annual Revenue |
|---|---|---|---|---|
| 1927 Magiagi Hydro Scheme Building Ruins | ||||
| Museum of Samoa | ||||
| Museum of Samoa | ||||
| Robert Louis Stevenson's Museum |
Libraries in Si’umu
| Name | Address | Staff | Annual Visits | Circulation | Collection | Programs |
|---|---|---|---|---|---|---|
| Library & Cafeteria | 0.0 | |||||
| Medical Records | 0.0 | |||||
| Mulivai Primary School Library and Technology Center | 0.0 | |||||
| Nelson Memorial Public Library | 0.0 | |||||
| Public Library | 0.0 | |||||
| USP Library | 0.0 |
Farmers Markets in Si’umu
| Name | Address | Season | Hours | Organic | Website |
|---|---|---|---|---|---|
| Accident Compensation Corporation Farmers Market | |||||
| Ah Fook Vegetable Stand | |||||
| Farmers Produce Market | |||||
| Fugalei Fresh Produce Market | |||||
| Laumua O Tumua Farmers Market | |||||
| Produce Stand | |||||
| Satui Fleamarket | |||||
| Savalalo Fish Market | |||||
| Vaitele Market | |||||
| Vegetable Market |
Stadiums & Teams in Si’umu
| Team | League | Division |
|---|---|---|
Airports Near Si’umu
3 airports within the area.
| Airport | IATA | Type |
|---|---|---|
| Faleolo International Airport | APW | Large Airport |
| Fagali'i Airport | FGI | Small Airport |
| Maota Airport | MXS | Small Airport |
Churches & Religious Organizations in Si’umu
11 religious organizations (IRS tax-exempt data).
| Name | Address |
|---|---|
| Livingstone Evangelism Ministries | |
| Maninoa Methodist Church | |
| Mulivai Catholic Church | |
| Sa'aga Siumu Church of Jesus Christ & the Latter-Day Saints | |
| Siumu Church of Jesus Christ and the Latter-day Saints | |
| Siumu Tai Church | |
| Siumu Tai Church | |
| Siumu Uta Church | |
| Siumu Worship Centre | |
| Tafitoala Catholic Church | |
| Tafitoala Congregational Christian Church |
Explore Near Si’umu
Quick Facts
🇼🇸 About Samoa
Frequently Asked Questions About Si’umu
What is the population of Si’umu?
Si’umu has a population of 1,183 residents and is located in Samoa. The population density is 25 people per square mile, spread across 47.8 square miles.
What is the weather like in Si’umu?
Si’umu has a warm climate with an average annual temperature of 80°F (27°C). Winter temperatures average 80°F in January, while summers reach an average of 79°F in July. The area receives 343 sunny days per year, well above the national average of 205. Annual rainfall totals 92.0 inches.