Ribeira Seca, Portugal

Full City Profile

1,025 Population 80/sq mi density

499 ft Elevation 152 meters

62°F Avg Temperature 17°C

Ribeira Seca enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 56°F in January while summers reach 69°F in July. The area gets 241 sunny days per year. Annual precipitation totals 52.6 inches. The area receives 0.0 inches of snow annually.

Temperature

56°F Jan (13°C) 69°F Jul (20°C)

Annual Average	61.8°F
	14% above US avg
January Average	56°F (13°C)
July Average	69°F (20°C)
Sunny Days	241 days/yr

Geography

Elevation	499 ft (152 m)
Area	12.9 sq mi (33.4 km²)
Population Density	80/sq mi
Coordinates	38.6000°N, 27.9833°W
Timezone	Atlantic/Azores

Precipitation & Snow

Annual Rainfall 52.6"

38% above US avg

Snowfall 0.0"

Wettest Month (Jan) 6.57"

Driest Month (Jul) 1.89"

Air Quality

Earthquake History

74 earthquakes (M2.5+) within 150 km since 1990. Strongest: M6.2. Most recent: M4.4 on Mar 25, 2025.

Jul 9, 1998	12 km N of Horta, Portugal	M6.2	56 km
Jun 27, 1997	50 km SE of Porto Martins, Portugal	M5.9	117 km
Jan 11, 2021	69 km NW of Castelo Branco, Portugal	M5.4	124 km
Jan 20, 1993	49 km W of Castelo Branco, Portugal	M5.4	113 km
Jun 27, 1997	51 km SE of Porto Judeu, Portugal	M5.2	112 km
Aug 1, 2000	39 km NW of Castelo Branco, Portugal	M5.1	92 km
Jun 28, 1997	45 km SE of Porto Judeu, Portugal	M5.1	107 km
Jan 12, 1993	45 km WSW of Castelo Branco, Portugal	M5.0	109 km
Jan 14, 2024	4 km W of Fonte Bastardo, Portugal	M4.9	75 km
Jan 28, 1993	46 km W of Castelo Branco, Portugal	M4.9	110 km
Mar 24, 1996	53 km SE of Porto Martins, Portugal	M4.9	121 km
Apr 11, 2014	66 km WNW of Mosteiros, Portugal	M4.9	139 km
Aug 27, 1997	69 km SE of Porto Martins, Portugal	M4.9	133 km
Feb 23, 1998	80 km NW of Castelo Branco, Portugal	M4.8	129 km
Jun 28, 1997	49 km SSE of Porto Judeu, Portugal	M4.8	108 km
Jun 14, 2015	37 km WNW of Castelo Branco, Portugal	M4.8	98 km
Feb 15, 1993	42 km W of Castelo Branco, Portugal	M4.7	107 km
Apr 30, 2015	49 km WNW of Castelo Branco, Portugal	M4.7	110 km
Jul 11, 1998	9 km WSW of Castelo Branco, Portugal	M4.7	73 km
Feb 16, 1993	73 km NW of Castelo Branco, Portugal	M4.7	121 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

3 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 1.

Year	Name	Category	Closest
2012	Gordon	Category 1	273 km
2006	Gordon	Category 1	111 km
1998	Ivan	Category 1	235 km

Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

3 tsunamis recorded within 500 km. Highest wave on record: 9.0 m (30 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1641	AZORES	Unknown	9.0 m	—	24 km
1980	AZORES	Earthquake	0.4 m	69	25 km
1757	AZORES	Earthquake	—	1,053	10 km

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

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Pico (39 km).

Name	Type	Elevation	Last Eruption	Distance
Pico	Stratovolcano	2,351 m (7,713 ft)	1720	39 km
Graciosa	Stratovolcano	402 m (1,319 ft)	-1950	47 km
Terceira	Stratovolcano(es)	1,023 m (3,356 ft)	2000	59 km
Fayal	Stratovolcano	1,043 m (3,422 ft)	1958	65 km

Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	56°F (13°C)	6.6 in	Wettest
February	56°F (13°C)	5.1 in	Coldest
March	56°F (14°C)	4.9 in
April	57°F (14°C)	3.8 in
May	60°F (16°C)	3.3 in
June	64°F (18°C)	2.3 in
July	69°F (20°C)	1.9 in	Driest
August	71°F (21°C)	2.7 in	Warmest
September	69°F (21°C)	4.3 in
October	65°F (18°C)	5.5 in
November	61°F (16°C)	5.9 in
December	58°F (14°C)	6.3 in

Ribeira Seca has a seasonal temperature swing of 15°F / from 56°F in February to 71°F in August. Total annual precipitation is 52.6 inches, with January being the wettest month (6.6") and July the driest (1.9").

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