FloodRadar
Log inCreate free account
FloodRadar
Log inCreate free account
How much rain fell in Portsmouth, Hampshire? Daily, weekly and monthly totals averaged over the Environment Agency rain gauges within 15km, updated every 15 minutes.
Next 24 hours: little or no rain forecast for the area around Portsmouth (under 0.2mm).
A computer model forecast (DWD ICON) for a square about 15 km across, updated 11:05 UK time. It is a forecast, not a measurement, and not a Met Office forecast. Weather data by Open-Meteo (CC BY 4.0).
Daily totals for UK days from the same computer model; "dry" means under 0.2mm. Forecasts further ahead are less certain.
Chance of rain in Portsmouth
Met Office forecast for the next 24 hours: less than 5% chance of more than 1 mm, less than 5% chance of more than 4 mm and less than 5% chance of more than 12 mm.
Next 48 hours: 5% chance of more than 1 mm.
Updated 16:40 on Tue 27 Oct. For the Met Office forecast point under 1 km from Portsmouth. Powered by Met Office data.
| Gauge | Distance | Yesterday | 7 days | October | Today |
|---|---|---|---|---|---|
| Rainfall gauge nr Portsmouth | 0.6km | 2.8mm | 94.1mm | 116.3mm | 2.5mm |
| Rainfall gauge nr Havant nr Havant | 7.8km | 3.4mm | 92.0mm | 120.3mm | 1.8mm |
| Rainfall gauge nr Ryde nr Ryde | 10.3km | 4.1mm | 78.8mm | 108.9mm | 3.3mm |
Daily totals 27 Sep–26 Oct. Wettest day: 26.0mm.
16 days with at least 0.2mm of rain so far this October at Rainfall gauge nr Portsmouth, against a full-month average of 18.0 rain days (based on 2 months of records at this gauge).
The rain gauges near Portsmouth do not have a long enough daily record yet, so this is the Met Office series for the wider region.
Yearly rainfall 1986–2025, with the dashed line at the 1991–2020 average. Wettest: 2000 (1,109 mm). Driest: 2005 (610 mm). Source: Met Office HadUK-Grid areal series, Open Government Licence v3.0.
Portsmouth gets about 754 mm of rain a year on average (wettest month November, 92 mm; driest May, 40 mm). That is drier than the UK as a whole, which averages 1,163 mm a year.
Monthly averages in mm. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 1.9 km from the town's gauge centre. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0. UK comparison: Met Office HadUK-Grid areal series, 1991-2020, Open Government Licence v3.0.
Rain gauge River gauge Storm overflow
A level is shown only when the gauge's latest reading is under 6 hours old. Distances are straight-line from the centre of Portsmouth's monitored area.
14 storm overflows within 5 km of the centre of Portsmouth's monitored area. None of the 14 with a live status is discharging right now.
Event Duration Monitors show when an overflow may be spilling; they do not confirm it, and this is not advice on water quality. A live status older than two hours counts as no current status. Live status: © Southern Water storm overflow activity data, licensed under CC BY 4.0. Annual spill figures: Environment Agency Event Duration Monitoring return, © Environment Agency copyright and/or database right, Open Government Licence (OGL) v3.0.
City in Hampshire, England
Portsmouth is a port city and unitary authority in Hampshire, England. Most of Portsmouth is located on Portsea Island off the south coast of England in the Solent, making Portsmouth the only city in England not located primarily on the mainland. The city is located 22 miles (35 km) south-east of Southampton, 50 miles (80 km) west of Brighton and Hove, and 74 miles (119 km) south-west of London. With a population last recorded at 208,100, it is the most densely populated city in the United Kingdom. Portsmouth forms part of the South Hampshire urban area with Gosport, Fareham, Havant, Eastleigh and Southampton.
From Wikipedia, the free encyclopedia (CC BY-SA 4.0).
3.6mm of rain fell yesterday (26 Oct 2026), from the average of 5 rain gauges within 15km of Portsmouth.
October so far: 126.3mm vs 94.0mm October average — 34% wetter (the average covers the whole month; we are 27 days in). Figures are the average of 5 rain gauges within 15km.
Rainfall gauge nr Portsmouth is the nearest rain gauge, 0.6km from the centre of Portsmouth's monitored area. Rain gauges can be several kilometres from the town itself, so very local downpours may not register exactly.
16 days with at least 0.2mm of rain so far this October at Rainfall gauge nr Portsmouth, against a full-month average of 18.0 rain days.
Rainfall data: Environment Agency rain gauges, synced every 15 minutes. Daily totals are computed overnight (UTC days); "today so far" is live. Gauge distances are straight-line from the centre of Portsmouth's monitored area — local rainfall can vary over short distances.
FloodRadar helper · beta
