Foz do Arelho, Portugal

Full City Profile

1,339 Population 361/sq mi density

72 ft Elevation 22 meters

62°F Avg Temperature 17°C

Foz do Arelho enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 51°F in January while summers reach 68°F in July. The area gets 319 sunny days per year. Annual precipitation totals 36.0 inches. The area receives 0.0 inches of snow annually.

Temperature

51°F Jan (11°C) 68°F Jul (20°C)

Annual Average	61.7°F
	14% above US avg
January Average	51°F (11°C)
July Average	68°F (20°C)
Sunny Days	319 days/yr

Geography

Elevation	72 ft (22 m)
Area	3.7 sq mi (9.6 km²)
Population Density	361/sq mi
Coordinates	39.4367°N, 9.2137°W
Timezone	Europe/Lisbon

Precipitation & Snow

Annual Rainfall 36.0"

5% below US avg

Snowfall 0.0"

Wettest Month (Dec) 3.78"

Driest Month (Jul) 0.24"

Air Quality

Earthquake History

84 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.8. Most recent: M2.9 on Apr 16, 2025.

Feb 17, 2025	1 km NE of Charneca de Caparica, Portugal	M4.8	90 km
Aug 19, 2016	84 km W of Peniche, Portugal	M4.4	100 km
Aug 17, 2017	5 km N of Arruda dos Vinhos, Portugal	M4.2	46 km
Mar 27, 2010	13 km SE of Vale da Amoreira, Portugal	M4.1	148 km
Jan 15, 2018	25 km NNW of Évora, Portugal	M4.1	130 km
Aug 4, 2007	92 km W of Colares, Portugal	M4.0	125 km
Apr 3, 1995	4 km E of Tocha, Portugal	M3.9	107 km
Mar 7, 1997	66 km NW of Peniche, Portugal	M3.9	72 km
Jul 31, 1998	23 km W of Estremoz, Portugal	M3.8	133 km
Sep 20, 1999	0 km SW of Caxias, Portugal	M3.8	82 km
Mar 9, 1990	116 km W of Ericeira, Portugal	M3.8	138 km
Apr 10, 2001	6 km SSE of Louriçal, Portugal	M3.7	72 km
Feb 1, 2017	4 km WSW of Porto de Mós, Portugal	M3.6	35 km
Sep 4, 1996	4 km E of Santo Isidoro, Portugal	M3.6	51 km
Feb 18, 1990	2 km ENE of Abrigada, Portugal	M3.6	37 km
Jan 6, 2007	36 km SSW of Cascais, Portugal	M3.6	120 km
Apr 30, 1999	7 km WNW of Marinha Grande, Portugal	M3.6	41 km
Jan 11, 2005	12 km WSW of Montemor-o-Novo, Portugal	M3.5	121 km
Jun 20, 1991	3 km SE of Tavarede, Portugal	M3.5	86 km
May 10, 1990	69 km W of Gafanha da Encarnação, Portugal	M3.5	146 km

Source: USGS (M2.5+, 1990–2025)

Tsunami History

1 tsunami recorded within 500 km.

Year	Location	Cause	Max Wave	Deaths	Distance
1531	TAGUS RIVER, LISBON	Earthquake	—	30,000	83 km

Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	51°F (11°C)	3.6 in	Coldest
February	54°F (12°C)	2.9 in
March	56°F (13°C)	1.9 in
April	57°F (14°C)	2.2 in
May	60°F (16°C)	2.1 in
June	65°F (18°C)	0.8 in
July	68°F (20°C)	0.2 in	Warmest, Driest
August	68°F (20°C)	0.4 in
September	67°F (19°C)	1.1 in
October	63°F (17°C)	3.0 in
November	58°F (14°C)	3.5 in
December	54°F (12°C)	3.8 in	Wettest

Foz do Arelho has a seasonal temperature swing of 17°F / from 51°F in January to 68°F in July. Total annual precipitation is 25.5 inches, with December being the wettest month (3.8") and July the driest (0.2").

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