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Adacao, Guam
Mangilao · Guam
Adacao is a small town in Mangilao, Guam with a population of 3,638. Elevation: 16 ft (5 m). Average temperature: 80°F (27°C).
Data updated June 2026
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About Adacao
Adacao is a settlement in the north-east of Guam. It is located on the east coast, 11 miles east of Hagåtña, in the village of Mangilao.
People
Climate
| Population | 3,638 |
| Population Density | 110 / sq mi |
| Elevation | 16 ft (5 m) |
| Coordinates | 13.4924°, 144.8447° |
| Timezone | Pacific/Guam |
| Country | 🇬🇺 Guam |
| State / Province | Mangilao |
| Average Temperature | 80°F (27°C) |
| January Average | 78°F (26°C) |
| July Average | 81°F (27°C) |
| Annual Precipitation | 85.5 inches (2,171 mm) |
| Annual Snowfall | 0.0 inches (0 cm) |
About Adacao
Adacao is a small town in Guam (Mangilao) with a population of 3,638. The city sits at an elevation of 16 feet (5 meters) above sea level. The average annual temperature is 80°F (27°C). Temperatures range from 78°F in January to 81°F in July. Annual precipitation averages 85.5 inches. The timezone is Pacific/Guam.
Climate in Adacao
Adacao has an average annual temperature of 27.6°C (82°F). The hottest month is Jun (28.4°C), the coldest is Feb (26.8°C). Average annual precipitation is 2510 mm.
Temperature
| Annual Average | 80.1°F |
| 48% above Guam avg | |
| January Average | 78°F (26°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 182 days/yr |
Geography
| Elevation | 16 ft (5 m) |
| Area | 33.0 sq mi (85.5 km²) |
| Population Density | 110/sq mi |
| Coordinates | 13.4924°N, 144.8447°W |
| Timezone | Pacific/Guam |
Precipitation & Snow
Air Quality
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 2.4 m (8 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1993 | GUAM, MARIANA ISLANDS | Earthquake | 2.4 m | — | 57 km |
| 1909 | GUAM, MARIANA ISLANDS | Earthquake | — | — | 112 km |
Nearby Volcanoes
1 volcano within 200 km. Closest: NW Rota-1 (124 km).
| Name | Type | Elevation | Last Eruption | Distance |
| NW Rota-1 | Submarine | -517 m (-1,696 ft) | 2010 | 124 km |
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 78°F (26°C) | 4.1 in | |
| February | 78°F (26°C) | 3.6 in | Coldest |
| March | 79°F (26°C) | 2.9 in | Driest |
| April | 81°F (27°C) | 3.1 in | |
| May | 81°F (27°C) | 5.1 in | |
| June | 82°F (28°C) | 5.6 in | Warmest |
| July | 81°F (27°C) | 9.6 in | |
| August | 80°F (27°C) | 13.5 in | Wettest |
| September | 80°F (27°C) | 12.4 in | |
| October | 81°F (27°C) | 11.7 in | |
| November | 80°F (27°C) | 8.4 in | |
| December | 80°F (27°C) | 5.6 in |
Adacao has a seasonal temperature swing of 3°F / from 78°F in February to 82°F in June. Total annual precipitation is 85.5 inches, with August being the wettest month (13.5") and March the driest (2.9").
Museums in Adacao
| Name | Type | Address | Phone | Annual Revenue |
|---|---|---|---|---|
| Guam Museum | ||||
| Pacific War Museum | ||||
| T. Stell Newman Visitor Center |
Libraries in Adacao
| Name | Address | Staff | Annual Visits | Circulation | Collection | Programs |
|---|---|---|---|---|---|---|
| Agat Public Library | 0.0 | |||||
| Dededo Public Library | 0.0 | |||||
| Guam Territorial Law Library | 0.0 | |||||
| Library | 0.0 | |||||
| Nieves M Flores Memorial Library | 0.0 | |||||
| Umatac Outdoor Library | 0.0 |
Farmers Markets in Adacao
| Name | Address | Season | Hours | Organic | Website |
|---|---|---|---|---|---|
| Kimi Market 2 | |||||
| Young Pagat Market |
Cafes in Adacao
1 cafes within city radius — OpenStreetMap data
Gas Stations in Adacao
2 gas stations within city radius — OpenStreetMap data
Golf Courses in Adacao
1 golf courses within city radius — OpenStreetMap data
Stadiums & Teams in Adacao
| Team | League | Division |
|---|---|---|
Airports Near Adacao
4 airports within the area.
| Airport | IATA | Type |
|---|---|---|
| Antonio B. Won Pat International Airport | GUM | Large Airport |
| Rota International Airport | ROP | Large Airport |
| Andersen Air Force Base | UAM | Medium Airport |
| Northwest Field | — | Small Airport |
Churches & Religious Organizations in Adacao
3 religious organizations (IRS tax-exempt data).
| Name | Address |
|---|---|
| Guam Buddhism Society | |
| Pacific Presbyterian Church | |
| Sto Nino de Maligaya Chapel |
Quick Facts
🇬🇺 About Guam
Frequently Asked Questions About Adacao
What is the population of Adacao?
Adacao has a population of 3,638 residents and is located in Guam. The population density is 110 people per square mile, spread across 33.0 square miles.
What is the weather like in Adacao?
Adacao has a warm climate with an average annual temperature of 80°F (27°C). Winter temperatures average 78°F in January, while summers reach an average of 81°F in July. The area receives 182 sunny days per year. Annual rainfall totals 85.5 inches.