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Weather & Climate in Portslade, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Portslade experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 41°F in January while summers reach 62°F in July. The area gets 227 sunny days per year, above the national average. Annual precipitation totals 40.5 inches. The area receives 4.3 inches of snow annually. The city sits at an elevation of 131 feet.
Temperature
41°F Jan (5°C)
62°F Jul (17°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 62°F (17°C) |
| Sunny Days | 227 days/yr |
Geography
| Elevation | 131 ft (40 m) |
| Area | 201.2 sq mi (521.1 km²) |
| Population Density | 99/sq mi |
| Coordinates | 50.8429°N, 0.2161°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
35 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Oct 6, 1999 | 34 km NNW of Fécamp, France | M4.6 | 94 km | 1 km |
| Apr 28, 2007 | 1 km WNW of Lympne, United Kingdom | M4.6 | 90 km | 10 km |
| Dec 14, 1991 | 3 km SSE of Longfossé, France | M4.0 | 146 km | 10 km |
| Jul 14, 2011 | 62 km SSE of Ventnor, United Kingdom | M3.9 | 88 km | 10 km |
| Jan 27, 1998 | 27 km W of Le Touquet-Paris-Plage, France | M3.8 | 107 km | 2 km |
| May 22, 2015 | 3 km SSE of Ramsgate, United Kingdom | M3.7 | 126 km | 12 km |
| Sep 23, 2003 | 41 km WNW of Étretat, France | M3.6 | 111 km | 10 km |
| Jan 27, 1992 | 6 km SSE of Longfossé, France | M3.5 | 148 km | 10 km |
| Sep 24, 2003 | 22 km WNW of Cauville-sur-Mer, France | M3.5 | 127 km | 17 km |
| Mar 3, 2009 | 1 km ENE of Hawkinge, United Kingdom | M3.5 | 102 km | 4 km |
| Jun 16, 1998 | 18 km NNW of Yport, France | M3.3 | 111 km | 5 km |
| Sep 9, 1995 | 0 km WNW of East Wittering, United Kingdom | M3.3 | 47 km | 10 km |
| Feb 27, 2019 | 3 km SE of Dorking, United Kingdom | M3.3 | 41 km | 10 km |
| Feb 13, 1997 | 26 km W of Le Touquet-Paris-Plage, France | M3.2 | 107 km | 5 km |
| May 4, 1990 | 0 km NE of Coquelles, France | M3.1 | 142 km | 10 km |
| May 19, 2019 | 7 km ESE of Swanage, United Kingdom | M3.0 | 120 km | 10 km |
| May 1, 1997 | 21 km W of Fort-Mahon-Plage, France | M3.0 | 118 km | 5 km |
| Aug 26, 2002 | 40 km NNW of Étretat, France | M3.0 | 90 km | 4 km |
| Nov 26, 1991 | 50 km N of Urville-Nacqueville, France | M3.0 | 132 km | 10 km |
| Jul 16, 2005 | 3 km WSW of Southwater, United Kingdom | M2.9 | 22 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 6.0 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1858 | NORTH SEA | Unknown | 6.0 m | — | 130 km |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | — | 106 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 3.4 in | |
| February | 40°F (4°C) | 2.3 in | Coldest |
| March | 43°F (6°C) | 2.4 in | |
| April | 47°F (8°C) | 1.9 in | |
| May | 53°F (12°C) | 1.8 in | |
| June | 58°F (14°C) | 2.1 in | |
| July | 62°F (17°C) | 1.6 in | Warmest, Driest |
| August | 62°F (16°C) | 2.1 in | |
| September | 57°F (14°C) | 2.6 in | |
| October | 51°F (11°C) | 3.2 in | |
| November | 45°F (7°C) | 3.4 in | |
| December | 41°F (5°C) | 3.6 in | Wettest |
Portslade has a seasonal temperature swing of 22°F / from 40°F in February to 62°F in July. Total annual precipitation is 30.2 inches, with December being the wettest month (3.6") and July the driest (1.6").