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Last updated: 20:00, 5 Oct 2026
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Hersham is a village in Surrey between Walton-on-Thames and Esher, with a green at its centre and open commuter belt streets running out toward the Thames a short distance to the north. The flat Surrey ground here gives rain little to slow it before it reaches the village. That is the situation a live Hersham rain radar handles well: hyperlocal radar reads the cell over your street, not the average for the region.
What makes rain hard to predict here is not the frontal bands rolling in from the south-west, which are routine, but the convective storms that grow out of warm ground and city heat. The Chilterns and North Downs help direct where these cells form and travel, and a single storm can drop enough water to overwhelm drainage in minutes even after a forecast called only a chance of showers. The flat commuter belt around Hersham gives showers a clear run from the west, so a band over Walton-on-Thames can reach the village green within minutes.
RainViewer draws the live rain radar for Hersham, England, from Met Office data, with real-time rain refreshed on every 5-minute radar update. The live map shows whether a shower is still over Walton-on-Thames or already crossing Hersham, which a forecast for the village cannot tell you.
Frontal rain arrives in repeated bands, and named storms bring wind as well as rain. Repeated rain raises the Thames and its tributaries, and roads, rail and low-lying streets are affected first. Autumn and winter fronts cross the flat ground steadily, and the Thames rises a short distance north of the village.
Spring showers cross the commuter belt quickly, and walks around the green and toward the river are the plans most often caught out. February to April swings between cold showers, hail and bursts of sun, and forecasting is at its least reliable because these showers are small and move fast. That leaves spring races, park events and weekend sport the most exposed to a sudden change.
Summer storms build over the warm streets, and events on the village green depend on the gaps between them. Between May and September, heat built up over the city triggers thunderstorms that dump short, intense rain, flooding roads and stations within minutes. For festivals, tennis and open-air events, the storm cell's track matters most, and radar shows that track before it appears in the sky.
Hersham's village green sits open at the centre of the village with little nearby shelter. Watch the cell approach and decide whether to start a walk or wait under cover.
The riverside paths toward Walton-on-Thames flood when the Thames is high, and walkers reroute onto higher streets. Check the radar for rain upstream before setting off.
Commuters walking from Hersham station to the surrounding streets cross open ground with little cover. Check the radar and time the walk to the gap between showers.
The A244 and the lanes linking Hersham to Esher carry heavy school-run traffic, and standing water builds fast on the low stretches. See whether the cell will pass before the drop-off.
RainViewer shows UK precipitation using data from the Met Office, the national weather service, which runs a network of C-band dual-polarization weather radars. The Met Office network also feeds the European OPERA composite, and the RainViewer map refreshes with each new scan, about every 5 minutes. From Hersham the map also covers Walton-on-Thames, Esher and Weybridge.
Hersham's village green sits open at the heart of the village, so a shower crossing the flat commuter belt from the west catches walkers there with little warning. Families and dog owners both watch the radar closely. RainViewer shows the cell before it reaches the green.
Yes, the riverside paths toward Walton-on-Thames flood when the Thames is high after heavy rain upstream, and low stretches can stay wet for days. Check the radar for rain upstream before setting off. Checking the map shows whether the cell is still to arrive or already past.
Hersham itself sits on flat ground and holds surface water on low streets after intense rain, though it is the riverside paths toward the Thames a short distance north that flood most often. Older drains can back up in a heavy burst. The radar shows whether a heavy cell is crossing the area.
May to September is the best window to visit Hersham, when the village green and the riverside walks toward the Thames are at their driest. Summer storms over the commuter belt are short but can be heavy. Check the radar in the morning and plan outdoor time for the dry gap.
The green sits on slightly higher ground toward the centre of the village, so it can stay dry while heavy rain upstream raises the Thames along the riverside paths near Walton. RainViewer draws each shower where it actually is, which is why a look at the village green and the riverside near Walton can give different answers.
The Hersham radar map needs a connection to pull the latest Met Office scan, refreshed roughly every 5 minutes, so it is not built for offline use. Dual-polarization radar from the Met Office distinguishes heavy convective downpours from ordinary frontal rain, a distinction that matters in London because it is the convective storms that overwhelm underpasses and flood stations. That live, hyperlocal feed is only as current as the last successful update.
Set a rain alert on the village green or the riverside and RainViewer warns you before rain arrives. That helps you time a walk, an errand, or the commute. The 2-hour forecast in 5-minute slices shows the next gap, and saved locations track Walton-on-Thames and Esher together.
A walk around the village green and a stroll by the Thames both depend on a dry gap, and RainViewer shows the next one.
Rain in Hersham arrives in bands from the south-west, and summer storms can appear within minutes.
Your forecast for Hersham says rain this afternoon. RainViewer's live hyperlocal radar shows the cell still over Walton-on-Thames with the village green still dry, which decides whether the walk starts now.
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The 5-minute steps show whether the walk around the village green fits inside the dry gap.
Set the alert at the village green, and the warning arrives in time to decide whether to head to the river now or wait.
Storms usually arrive from the south-west over Hersham, and the arrows show which way each cell is moving.
Check the Thames upstream near Walton in the last 48 hours to see how much rain came down.
Keep the village green, Walton-on-Thames and Esher on the same list, each with its own alert.