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Weather & Climate in Castro Marim, Portugal
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Castro Marim enjoys a temperate climate with an average annual temperature of 64°F (18°C). Winters average 52°F in January while summers reach 77°F in July. The area gets 300 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 19.8 inches (drier than the 38-inch national average). The city sits at an elevation of 20 feet.
Temperature
52°F Jan (11°C)
77°F Jul (25°C)
| Annual Average | 63.8°F |
| 18% above US avg | |
| January Average | 52°F (11°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 300 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 33.1 sq mi (85.7 km²) |
| Population Density | 154/sq mi |
| Coordinates | 37.2207°N, 7.4435°W |
| Timezone | Europe/Lisbon |
Precipitation & Snow
Air Quality
Earthquake History
367 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Jan 3, 2005 | 45 km SSE of Fuzeta, Portugal | M4.7 | 61 km | 60 km |
| Jan 10, 2006 | 82 km SSE of Fuzeta, Portugal | M4.5 | 98 km | 3 km |
| Aug 25, 2010 | 13 km WSW of Chiclana de la Frontera, Spain | M4.5 | 140 km | 44 km |
| Jul 5, 2000 | 64 km S of Faro, Portugal | M4.5 | 97 km | 10 km |
| Apr 8, 2006 | 36 km S of Mazagón, Spain | M4.4 | 67 km | 42 km |
| Mar 24, 2025 | 76 km S of Faro, Portugal | M4.4 | 107 km | 10 km |
| Jun 22, 1993 | 71 km SSW of Faro, Portugal | M4.4 | 110 km | 32 km |
| Sep 24, 1994 | 41 km SSE of Faro, Portugal | M4.3 | 72 km | 34 km |
| May 27, 2005 | 26 km SSW of Carvoeiro, Portugal | M4.3 | 107 km | 34 km |
| Nov 9, 1993 | 44 km SSE of Olhão, Portugal | M4.3 | 68 km | 29 km |
| Sep 8, 2009 | 103 km S of Faro, Portugal | M4.3 | 134 km | 21 km |
| Mar 2, 2016 | 93 km SSW of Faro, Portugal | M4.3 | 130 km | 10 km |
| Jul 4, 1994 | 13 km ENE of El Cerro de Andévalo, Spain | M4.3 | 85 km | 10 km |
| Jan 1, 2022 | 80 km SSE of Olhão, Portugal | M4.3 | 102 km | 7 km |
| May 23, 2005 | Strait of Gibraltar | M4.3 | 84 km | 25 km |
| Feb 16, 1993 | 49 km SSE of Senhora da Luz, Portugal | M4.2 | 118 km | 34 km |
| Mar 14, 2004 | 84 km S of Carvoeiro, Portugal | M4.2 | 131 km | 11 km |
| Aug 18, 2009 | 113 km S of Faro, Portugal | M4.2 | 143 km | 10 km |
| Jan 1, 2008 | 97 km SSE of Sagres, Portugal | M4.2 | 147 km | 45 km |
| Feb 23, 2005 | 91 km S of Olhão, Portugal | M4.1 | 115 km | 36 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 0.1 m (0 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1978 | CADIZ | Earthquake | 0.1 m | — | 103 km |
| 881 | CADIZ | Earthquake | — | — | 145 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 52°F (11°C) | 2.9 in | Coldest |
| February | 54°F (12°C) | 2.0 in | |
| March | 57°F (14°C) | 1.5 in | |
| April | 60°F (15°C) | 1.8 in | |
| May | 65°F (18°C) | 1.1 in | |
| June | 72°F (22°C) | 0.5 in | |
| July | 77°F (25°C) | 0.1 in | Warmest, Driest |
| August | 77°F (25°C) | 0.2 in | |
| September | 73°F (23°C) | 0.7 in | |
| October | 66°F (19°C) | 2.3 in | |
| November | 59°F (15°C) | 3.0 in | |
| December | 54°F (12°C) | 3.7 in | Wettest |
Castro Marim has a seasonal temperature swing of 25°F / from 52°F in January to 77°F in July. Total annual precipitation is 19.8 inches, with December being the wettest month (3.7") and July the driest (0.1").