Reference Data in Southend-on-Sea 11 indicators covering reference data for Southend-on-Sea. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 4.47 Degree days 2025 down 42.0% 1154th Cooling and heating degree days - Cities and FUAs — Change in cooling -3.99 Degree days 2025 down 431.5% 564th Cooling and heating degree days - Cities and FUAs 1,491 Degree days 2025 down 5.7% 691st Cooling and heating degree days - Cities and FUAs — Change in heating -296.93 Degree days 2025 down 43.9% 613th Precipitation - Cities and FUAs — Extreme precipitation days 3 Days per year 2024 up 87.6% 982nd Precipitation - Cities and FUAs — Change in extreme precipitation 1.21 Days per year 2024 up 723.2% 622nd Dependency ratio - Cities and FUAs 30.7 Percentage of population aged 15-64 years 2024 up 3.0% 533rd Wind threats - Cities and FUAs — Exposure to wind threats 0 Percentage of area 2023 down 100.0% 273rd Coastal flooding - Cities and FUAs — Built-up area exposure to 1.06 Percentage of built-up area 2022 up 9.1% 105th Internet speed - Cities and FUAs — Downloading speed 10.7 Percentage of national value 2025 down 33.1% 455th Internet speed - Cities and FUAs — Uploading speed 40.1 Percentage of national value 2025 up 641.9% 118th