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Weather & Climate in Portswood, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Portswood experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 41°F in January while summers reach 62°F in July. The area gets 228 sunny days per year, above the national average. Annual precipitation totals 40.6 inches. The area receives 4.1 inches of snow annually. The city sits at an elevation of 66 feet.
Temperature
41°F Jan (5°C)
62°F Jul (17°C)
| Annual Average | 52.8°F |
| 2% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 62°F (17°C) |
| Sunny Days | 228 days/yr |
Geography
| Elevation | 66 ft (20 m) |
| Area | 1.1 sq mi (2.8 km²) |
| Population Density | 13,732/sq mi |
| Coordinates | 50.9272°N, 1.3903°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
32 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Jul 14, 2011 | 62 km SSE of Ventnor, United Kingdom | M3.9 | 101 km | 10 km |
| May 12, 1994 | 4 km S of Shipston on Stour, United Kingdom | M3.7 | 123 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.7 | 113 km | 7 km |
| Jan 1, 1994 | Wales-England region, United Kingdom | M3.6 | 147 km | 10 km |
| Sep 23, 2003 | 41 km WNW of Étretat, France | M3.6 | 141 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.6 | 113 km | 7 km |
| Oct 10, 2001 | 2 km SSE of Caerphilly, United Kingdom | M3.5 | 144 km | 10 km |
| Jun 20, 2002 | 3 km N of Marshfield, United Kingdom | M3.4 | 138 km | 14 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 40 km | 10 km |
| Sep 23, 1992 | 1 km NNE of Tiverton, United Kingdom | M3.3 | 147 km | 10 km |
| Feb 27, 2019 | 3 km SE of Dorking, United Kingdom | M3.3 | 83 km | 10 km |
| Jan 29, 2004 | 2 km E of North Petherton, United Kingdom | M3.3 | 113 km | 7 km |
| Jun 17, 1999 | 7 km NNE of Ross on Wye, United Kingdom | M3.0 | 140 km | 10 km |
| May 19, 2019 | 7 km ESE of Swanage, United Kingdom | M3.0 | 52 km | 10 km |
| Aug 26, 2002 | 40 km NNW of Étretat, France | M3.0 | 138 km | 4 km |
| Nov 26, 1991 | 50 km N of Urville-Nacqueville, France | M3.0 | 91 km | 10 km |
| Jan 28, 2002 | 1 km S of Abercarn, United Kingdom | M3.0 | 145 km | 10 km |
| Feb 11, 1998 | 4 km SE of Newport, United Kingdom | M2.9 | 130 km | 10 km |
| Mar 23, 1998 | 11 km W of Chickerell, United Kingdom | M2.9 | 97 km | 5 km |
| Aug 17, 1992 | 1 km E of Machen, United Kingdom | M2.9 | 142 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 0.4 m (1 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2011 | PLYMOUTH, ENGLAND | Avalanche | 0.4 m | — | 123 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 3.3 in | Coldest |
| February | 41°F (5°C) | 2.3 in | |
| March | 45°F (7°C) | 2.4 in | |
| April | 48°F (9°C) | 1.9 in | |
| May | 54°F (12°C) | 1.8 in | |
| June | 59°F (15°C) | 2.2 in | |
| July | 62°F (17°C) | 1.5 in | Driest |
| August | 63°F (17°C) | 2.1 in | Warmest |
| September | 58°F (15°C) | 2.6 in | |
| October | 52°F (11°C) | 3.1 in | |
| November | 46°F (8°C) | 3.4 in | Wettest |
| December | 43°F (6°C) | 3.4 in |
Portswood has a seasonal temperature swing of 22°F / from 41°F in January to 63°F in August. Total annual precipitation is 29.9 inches, with November being the wettest month (3.4") and July the driest (1.5").