All Countries
Portsmouth, Dominica
Saint John Parish · Dominica
Portsmouth is a small town in Saint John Parish, Dominica with a population of 3,633. Elevation: 3 ft (1 m). Average temperature: 77°F (25°C).
Data updated June 2026
Discover Portsmouth, Dominica
Explore over 40 sections covering people, economy, housing, health, crime, climate, community, costs, trends, schools, colleges, hospitals, treatment centers, industries, museums, libraries, breweries, farmers markets, grocery stores, pharmacies, campgrounds, parks, trails, stadiums, ski resorts, daycare centers, nursing homes, churches, fire stations, cell towers, bridges, power plants, EV stations, prisons, radio stations, airports, police stations, post offices, Amtrak stations, superfund sites, UNESCO sites, and more.
Use the tabs and dropdown menus below to navigate every data point we track for this city.
About Portsmouth
Portsmouth is the second largest town in Dominica, with 3,630 inhabitants. It is located on the shore of a natural Harbor, Prince Rupert Bay, in Saint John Parish on the north-west coast of Dominica. The area was called Ouyouhao by the Kalinago and Grand Anse by the French. The Indian River is Portsmouth’s southern border and Cabrits National Park is located on a peninsula to the north of town.
People
Climate
| Population | 3,633 |
| Population Density | 1,747 / sq mi |
| Elevation | 3 ft (1 m) |
| Coordinates | 15.5829°, -61.4559° |
| Timezone | America/Dominica |
| Country | 🇩🇲 Dominica |
| State / Province | Saint John Parish |
| Average Temperature | 77°F (25°C) |
| January Average | 74°F (23°C) |
| July Average | 79°F (26°C) |
| Annual Precipitation | 76.3 inches (1,937 mm) |
| Annual Snowfall | 0.0 inches (0 cm) |
About Portsmouth
Portsmouth is a small town in Dominica (Saint John Parish) with a population of 3,633. The city sits at an elevation of 3 feet (1 meters) above sea level. The average annual temperature is 77°F (25°C). Temperatures range from 74°F in January to 79°F in July. Annual precipitation averages 76.3 inches. The timezone is America/Dominica.
Temperature
| Annual Average | 77.1°F |
| 43% above Dominica avg | |
| January Average | 74°F (23°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 198 days/yr |
Geography
| Elevation | 3 ft (1 m) |
| Area | 2.1 sq mi (5.4 km²) |
| Population Density | 1,747/sq mi |
| Coordinates | 15.5829°N, 61.4559°W |
| Timezone | America/Dominica |
Precipitation & Snow
Air Quality
Tsunami History
15 tsunamis recorded within 500 km. Highest wave on record: 5.0 m (16 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1902 | MOUNT PELEE | Explosion | 5.0 m | 23 | 90 km |
| 2003 | SOUFRIERE HILLS VOLCANO | Astronomical | 4.0 m | - | 148 km |
| 1902 | MOUNT PELEE | Astronomical | 4.0 m | - | 90 km |
| 1997 | WHITE RIVER VALLEY | Explosion | 3.0 m | - | 148 km |
| 1902 | MOUNT PELEE | Astronomical | 3.0 m | 1,500 | 90 km |
| 2004 | BASSE-TERRE, LES SAINTES | Earthquake | 2.0 m | 1 | 29 km |
| 1999 | SOUFRIERE HILLS VOLCANO | Astronomical | 2.0 m | - | 148 km |
| 1843 | POINTE-A-PITRE | Earthquake | 1.2 m | 5,000 | 129 km |
| 2006 | SOUFRIERE HILLS VOLCANO | Astronomical | 1.0 m | - | 148 km |
| 1902 | FORT-DE-FRANCE | Astronomical | 1.0 m | - | 117 km |
| 1902 | MARTINIQUE | Astronomical | 0.6 m | - | 124 km |
| 2005 | DOMINICA PASSAGE | Earthquake | - | - | 38 km |
| 1839 | MARTINIQUE | Earthquake | - | 390 | 119 km |
| 1823 | SAINT PIERRE | Earthquake | - | - | 140 km |
| 1767 | MARTINIQUE & BARBADOS | Earthquake | - | - | 140 km |
Nearby Volcanoes
9 volcanoes within 200 km. Closest: Diables, Morne aux (4 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Diables, Morne aux | Lava dome(s) | 861 m (2,825 ft) | Unknown | 4 km |
| Diablotins, Morne | Stratovolcano | 1,430 m (4,692 ft) | Unknown | 11 km |
| Trois Pitons, Morne | Complex | 1,387 m (4,551 ft) | 920 | 27 km |
| Watt, Morne | Stratovolcano(es) | 1,224 m (4,016 ft) | 1997 | 35 km |
| Plat Pays, Morne | Stratovolcano | 940 m (3,084 ft) | 1270 | 39 km |
| Soufriere Guadeloupe | Stratovolcano | 1,467 m (4,813 ft) | 1977 | 56 km |
| Pelee | Stratovolcano | 1,394 m (4,573 ft) | 1932 | 92 km |
| Soufriere Hills | Stratovolcano | 915 m (3,002 ft) | 2013 | 148 km |
| Qualibou | Caldera | 777 m (2,549 ft) | 1766 | 200 km |
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 74°F (23°C) | 5.5 in | Coldest |
| February | 74°F (23°C) | 3.4 in | |
| March | 75°F (24°C) | 3.3 in | Driest |
| April | 77°F (25°C) | 3.5 in | |
| May | 78°F (26°C) | 5.4 in | |
| June | 79°F (26°C) | 6.4 in | |
| July | 79°F (26°C) | 6.4 in | |
| August | 79°F (26°C) | 8.5 in | Warmest |
| September | 79°F (26°C) | 9.1 in | |
| October | 78°F (26°C) | 8.6 in | |
| November | 77°F (25°C) | 9.2 in | Wettest |
| December | 75°F (24°C) | 7.0 in |
Portsmouth has a seasonal temperature swing of 5°F / from 74°F in January to 79°F in August. Total annual precipitation is 76.3 inches, with November being the wettest month (9.2") and March the driest (3.3").
Schools in Portsmouth
6 public schools (NCES 2022-23 data).
| School | Level | Enrollment | Teachers | Student/Teacher |
|---|---|---|---|---|
| St. John's School | - | - | - | - |
| Portsmouth Seventh Day Adventist Secondary School | - | - | - | - |
| St. John's Academy | - | - | - | - |
| Roosevelt Douglas Primary School | - | - | - | - |
| Portsmouth Secondary School | - | - | - | - |
| Roosevelt Douglas Primary School | - | - | - | - |
Radio Stations near Portsmouth
4 stations within ~55 km.
| Station | Genre | Quality | |
|---|---|---|---|
| DBS Radio | - | MP3 96 kbps | |
| Voice of Life Radio | - | MP3 128 kbps | |
| Dominica Catholic Radio | - | MP3 128 kbps | |
| En Ba Mango | - | MP3 128 kbps |
Museums in Portsmouth
| Name | Type | Address | Phone | Annual Revenue |
|---|---|---|---|---|
| Interpretation room | ||||
| Old Mill Cultural Centre |
Libraries in Portsmouth
| Name | Address | Staff | Annual Visits | Circulation | Collection | Programs |
|---|---|---|---|---|---|---|
| Marigot Library | 0.0 | |||||
| Portsmouth Public Library | 0.0 | |||||
| Ross University School of Medicine - Anne Ross Library | 0.0 | |||||
| Tunubuku Library & Computer Centre | 0.0 |
Farmers Markets in Portsmouth
| Name | Address | Season | Hours | Organic | Website |
|---|---|---|---|---|---|
| Portsmouth Market |
Hotels in Portsmouth
8 hotels within city radius - OpenStreetMap data
Restaurants in Portsmouth
36 restaurants within city radius - OpenStreetMap data
Cafes in Portsmouth
3 cafes within city radius - OpenStreetMap data
Dentists in Portsmouth
1 dentists within city radius - OpenStreetMap data
Gas Stations in Portsmouth
3 gas stations within city radius - OpenStreetMap data
Banks in Portsmouth
4 banks within city radius - OpenStreetMap data
Airports Near Portsmouth
8 airports within the area.
| Airport | IATA | Type |
|---|---|---|
| Maryse Condé International Airport | PTP | Large Airport |
| Canefield Airport | DCF | Medium Airport |
| Douglas-Charles Airport | DOM | Medium Airport |
| Marie-Galante Airport | GBJ | Medium Airport |
| Basse-Terre Baillif Airport | BBR | Small Airport |
| La Désirade Airport | DSD | Small Airport |
| St-François Airport | SFC | Small Airport |
| Terre-de-Haut Airport | LSS | Small Airport |
Post Offices in Portsmouth
1 post offices.
| Post Office | Address |
|---|---|
| Portsmouth Post Office |
Churches & Religious Organizations in Portsmouth
12 religious organizations (IRS tax-exempt data).
| Name | Address |
|---|---|
| (R&D) Reconciliation & Deliverance Holiness Tabernacle | |
| Anglican Church | |
| Catholic Chapel of our Lady of Guadalupe | |
| Church of God of Prophesy | |
| First Olivette Baptist Church | |
| God's Family House of Worship | |
| Grace Baptist Church | |
| Portsmouth Christian Union Church | |
| Portsmouth Congregation of Jehovah's Witnesses | |
| Portsmouth Methodist Church | |
| Portsmouth Roman Catholic Church | |
| Portsmouth Seventh Day Adventist Church |
Explore Near Portsmouth
Quick Facts
🇩🇲 About Dominica
Download Full City Report
Get a comprehensive, print-ready PDF with all data for Portsmouth.
Get ReportFrequently Asked Questions About Portsmouth
What is the population of Portsmouth?
Portsmouth has a population of 3,633 residents and is located in Dominica. The population density is 1,747 people per square mile, spread across 2.1 square miles.
What is the weather like in Portsmouth?
Portsmouth has a warm climate with an average annual temperature of 77°F (25°C). Winter temperatures average 74°F in January, while summers reach an average of 79°F in July. The area receives 198 sunny days per year. Annual rainfall totals 76.3 inches.