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Weather & Climate in Port Antonio, Jamaica
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Port Antonio has a warm climate with an average annual temperature of 78°F (26°C). Winters average 75°F in January while summers reach 81°F in July / relatively mild seasonal variation. The area gets 171 sunny days per year. Annual precipitation totals 90.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 7 feet.
Temperature
75°F Jan (24°C)
81°F Jul (27°C)
| Annual Average | 78.0°F |
| 44% above US avg | |
| January Average | 75°F (24°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 171 days/yr |
Geography
| Elevation | 7 ft (2 m) |
| Area | 409.6 sq mi (1,060.8 km²) |
| Population Density | 35/sq mi |
| Coordinates | 18.1789°N, 76.4522°W |
| Timezone | America/Jamaica |
Precipitation & Snow
Air Quality
Earthquake History
72 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.5.
| Jan 13, 1993 | 3 km N of Easington, Jamaica | M5.5 | 29 km | 16 km |
| Jun 13, 2005 | 8 km E of Ulster Spring, Jamaica | M5.2 | 106 km | 2 km |
| Mar 10, 2012 | 100 km NNE of Oracabessa, Jamaica | M4.8 | 109 km | 10 km |
| Aug 1, 2003 | Cuba region | M4.7 | 131 km | 10 km |
| Apr 15, 2023 | Saint Thomas, Jamaica | M4.6 | 30 km | 10 km |
| Aug 16, 2024 | 7 km NNE of Stony Hill, Jamaica | M4.5 | 33 km | 10 km |
| Aug 10, 2002 | 9 km N of Trinity Ville, Jamaica | M4.5 | 17 km | 33 km |
| Sep 22, 2023 | 9 km S of Buff Bay, Jamaica | M4.4 | 21 km | 10 km |
| Jan 24, 2001 | 75 km NNE of Oracabessa, Jamaica | M4.4 | 89 km | 33 km |
| May 6, 2011 | 7 km ENE of Mavis Bank, Jamaica | M4.2 | 21 km | 5 km |
| Oct 8, 1998 | 83 km WSW of Les Irois, Haiti | M4.2 | 142 km | 21 km |
| Aug 10, 2002 | 5 km WNW of Trinity Ville, Jamaica | M4.1 | 25 km | 15 km |
| May 2, 2024 | 5 km ENE of Buff Bay, Jamaica | M4.1 | 19 km | 10 km |
| Jun 14, 2020 | 8 km NNW of Buff Bay, Jamaica | M4.0 | 28 km | 10 km |
| Mar 3, 2018 | 5 km WSW of Hope Bay, Jamaica | M4.0 | 17 km | 14 km |
| Jun 18, 2024 | 2 km S of Maggotty, Jamaica | M4.0 | 139 km | 10 km |
| Sep 15, 2004 | 96 km E of Manchioneal, Jamaica | M4.0 | 114 km | 28 km |
| Jul 14, 2008 | 2 km SE of Constant Spring, Jamaica | M3.9 | 38 km | 16 km |
| May 27, 2004 | 14 km NE of Port Antonio, Jamaica | M3.9 | 14 km | 10 km |
| Feb 15, 1994 | 5 km SSW of Port Royal, Jamaica | M3.9 | 55 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
15 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Melissa | Category 5 | 190 mph | 97 km |
| 2024 | Beryl | Category 4 | 144 mph | 104 km |
| 2016 | Matthew | Category 4 | 150 mph | 228 km |
| 2012 | Sandy | Category 3 | 115 mph | 14 km |
| 2010 | Tomas | Category 1 | 86 mph | 143 km |
| 2008 | Gustav | Category 1 | 75 mph | 298 km |
| 2007 | Dean | Category 4 | 144 mph | 109 km |
| 2005 | Emily | Category 5 | 155 mph | 248 km |
| 2005 | Dennis | Category 4 | 138 mph | 52 km |
| 2004 | Ivan | Category 5 | 167 mph | 98 km |
| 2004 | Charley | Category 1 | 75 mph | 169 km |
| 2001 | Iris | Category 1 | 86 mph | 114 km |
| 1998 | Georges | Category 1 | 75 mph | 288 km |
| 1988 | Gilbert | Category 4 | 132 mph | 56 km |
| 1980 | Allen | Category 5 | 161 mph | 60 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 2.5 m (8 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1907 | JAMAICA | Earthquake | 2.5 m | 1,000 | 59 km |
| 1692 | PORT ROYAL | Eruption + Earthquake | 1.8 m | 3,000 | 50 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 75°F (24°C) | 7.6 in | Coldest |
| February | 75°F (24°C) | 3.5 in | |
| March | 76°F (25°C) | 3.4 in | Driest |
| April | 78°F (25°C) | 4.8 in | |
| May | 79°F (26°C) | 8.1 in | |
| June | 80°F (27°C) | 7.1 in | |
| July | 81°F (27°C) | 6.1 in | |
| August | 81°F (27°C) | 7.9 in | Warmest |
| September | 80°F (27°C) | 8.6 in | |
| October | 79°F (26°C) | 11.6 in | |
| November | 78°F (25°C) | 12.2 in | Wettest |
| December | 76°F (24°C) | 9.9 in |
Port Antonio has a seasonal temperature swing of 6°F / from 75°F in January to 81°F in August. Total annual precipitation is 90.9 inches, with November being the wettest month (12.2") and March the driest (3.4").