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No official flood warning is active nearby and the closest river stations are within normal ranges.
Updated 2026-10-10 12:32:03 UTC · Official GOV.UK warnings · Flood preparation & help guide
Princes Marsh is monitored by 1 Environment Agency river level station on the River Rother, in Hampshire. Water levels are updated every 15 minutes.
The nearest watercourse on the river map is the River Rother, about 10 m from the middle of Princes Marsh's gauges. It flows into the River Arun about 49 km downstream.
A gauge downstream shows water that has already passed this point; one upstream sees it first. Distances along the river are from the point on the River Rother nearest the middle of Princes Marsh's gauges. From Ordnance Survey’s river map (OS Open Rivers), which leaves out small streams, ditches and culverts, so a nearer one may exist. This describes where water goes on the map; it says nothing about flooding at any address. Contains OS data © Crown copyright and database rights 2026.
Princes Marsh is monitored by 1 Environment Agency river level station on the River Rother, in Hampshire. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The River Rother is monitored by 1 station (Princes Marsh). Each station records water levels continuously, with data synced to FloodRadar every 5 minutes.
There are 6 Environment Agency flood warning areas within 10km of Princes Marsh. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: The Western River Rother in Hampshire and West Sussex, from Liss to Sheet, including Liss, Princes Marsh, and Sheet Mill; Tilmore Brook through central Petersfield from Winchester Road to the River Rother; Tilmore Brook through central Petersfield from Winchester Road to the River Rother; Stanbridge Stream at South Petersfield including Cranford Road and Borough Grove to The Causeway.
There are 5 storm overflows within 5km of Princes Marsh. None of the 5 with a reporting monitor are currently discharging. Enable "Sewage" on the map above to see their locations.
Each has its own page of live status and past discharges:
If flooding is forecast in Princes Marsh, call Floodline on 0345 988 1188 for the latest information. Move valuables upstairs, turn off gas and electricity if safe to do so, and avoid walking or driving through flood water. Sign up for flood warnings on any station page above to receive email alerts when water levels rise. For emergency numbers, a preparation checklist and insurance guidance, see our flood help & preparation guide.
Princes Marsh gets about 1,003 mm of rain a year on average (wettest month December, 120 mm; driest May, 57 mm). That is close to the UK as a whole, which averages 1,163 mm a year. See the rain gauges →
A thirty-year average for the area, not a forecast and not a flood risk on its own. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 0.6 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of the town centre — most recent first. These are records of mapped extents, not a full list of floods. See them on the map →
Records, not floods: no outline on the record is not evidence a place has not flooded.
Current verdict: Normal. No official flood warning is active nearby and the closest river stations are within normal ranges.
Princes Marsh has river level monitoring on River Rother — 1 monitoring station in total.
Use the GOV.UK Check for Flooding service (check-for-flooding.service.gov.uk) or call Floodline on 0345 988 1188 (24 hours). You can also set up free FloodRadar email or browser alerts from any station page above.
Follow official advice: move valuables and vehicles to safety, never walk or drive through flood water, turn off gas and electricity if safe, and check on vulnerable neighbours. See our flood preparation guide at floodradar.co.uk/flood-help.
No recorded flood outline is mapped around the Princes Marsh town centre means no flood was mapped here, which is not evidence none happened: the Environment Agency mapped only some floods, mapping effort rose sharply after about 2000, and surface-water flooding is largely absent from this record. FloodRadar has separately logged 10 flood warnings or alerts for the Hampshire area since February 2026. See the flood history link below.
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