Portsmouth Harbour - Haslar Marina Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - Haslar MarinaToday 16 Aug5%Mon 17 Aug30%Tue 18 Aug45%Wed 19 Aug40%Thu 20 Aug60%Fri 21 Aug30%Sat 22 Aug15%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Portsmouth Harbour - Haslar Marina rainfall forecast issued today at 7:09 am. Next forecast at approx. 9:09 pm. Rainfall Rainfall AccumulationDean Hill (Wiltshire) RadarGet WillyWeather+ to remove ads