Southend-on-Sea weather in September
Long-run climate averages for Southend-on-Sea, England in September, plus what the forecast models say for the days ahead.
In September, Southend-on-Sea averages 21°C by day and 13°C at night. The wettest month is usually March.
September in Southend-on-Sea averages a daytime high of 21°C and an overnight low of 13°C, which reads as mild for this part of the world. Across the whole year Southend-on-Sea sees roughly 803 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Southend-on-Sea forecast with every model compared and how much they currently agree.
Southend-on-Sea weather by month
what to expect in Southend-on-Sea through the yearHere is Southend-on-Sea's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Southend-on-Sea by season.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Southend-on-Sea, scoring 92/100 on our CheckWeather Score, ahead of the Met Office at 84. See the full UK accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Southend-on-Sea in September?
Is September a good time to visit Southend-on-Sea?
Does it rain a lot in Southend-on-Sea in September?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .