A yellow warning of rain for East Sussex has been issued by the Met Office for today (Monday January 27) and tomorrow.
The warning is for overnight today into Tuesday and forecasters say there will be frequent showers, some heavy, bringing a further 10-15 mm and locally up to 25 mm rain to parts of southern England.
They said the public should be aware of the potential for disruption due to localised flooding, especially where the ground is already saturated.
The chief forecaster said: “A very unsettled start to this week is expected as an area of low pressure moves slowly southwards across Britain to most likely be centred over the Irish Sea by the end of Tuesday.
“Bands of heavy showers forming on the southern flank of this area of low pressure will stream across much of southern England.”