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Last update: 21:00, 5 Oct 2026
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Horwich sits at the foot of the West Pennine Moors in Greater Manchester, with Rivington Pike and the moorland reservoirs rising steeply behind the town and the Middlebrook retail and leisure park on the lower ground towards Bolton. Rain arrives from the west and is lifted sharply by the moors, so Horwich sees more rain than Bolton just a few miles away. A Horwich rain radar shows this as it happens, and hyperlocal radar is what separates one street from the next.
Moisture-laden air arrives in North West England off the Irish Sea and rises sharply where it reaches the Pennines and the West Pennine Moors to the east, turning moderate rain into heavy rain on the western slopes. The Mersey and Irwell valleys channel that extra rain toward the cities, while the Fylde coast and the Wirral, sitting further from the hills, stay noticeably drier than the West Pennine towns and moors above them. The West Pennine Moors directly behind Horwich take the first and heaviest lift from an approaching band, while Middlebrook on the lower ground towards Bolton often sees a lighter version of the same shower.
RainViewer's map for Horwich, England, runs on Met Office radar, updating with each new scan so the rain shown is current, not modelled. The live map shows whether a shower is still over Rivington Pike or already crossing Middlebrook, which a forecast for Horwich cannot tell you.
Named storms and repeated fronts arrive from the Atlantic, and the ground stays saturated for weeks. The Irwell, Mersey and Ribble respond quickly, and moorland roads and low-lying streets flood first. Autumn and winter fronts settle against the West Pennine Moors above Horwich, and the reservoirs behind the town fill quickly.
Cold spring showers cross the moor edge with little warning, and walkers heading for Rivington Pike are the ones most often caught out. The last fronts of the season mix with cold showers, hail and wet snow over the tops. Because these showers are so narrow, forecasts often miss the exact timing, leaving hill walks and weekend sport the most exposed to a sudden change.
Summer storms build over the moors and can reach Horwich within the hour, and evenings at Middlebrook's leisure park depend on the gap between them. Showers become less frequent, but the warm plain still builds thunderstorms over the Pennines that then drift toward the cities. Outdoor events and seafront trips depend on finding a short dry gap, because a storm cell can be at the coast within the hour.
The path up to Rivington Pike catches showers before the town below does, and the moorland ground turns heavy quickly. Checking the radar before setting out shows whether the pike is already wet or the band has not yet arrived.
Middlebrook's open car parks and outdoor walkways have little shelter, and a shower crossing the moor edge can reach them within minutes. Watching the cell approach on the radar shows whether to start the visit now or wait.
The road linking Horwich to Bolton and Chorley slows in heavy rain, and spray builds on the climb out of the moor edge. A look at the radar before setting off shows the cell's position.
The reservoirs and moorland paths above Horwich are fully exposed once a shower starts, and the ground turns heavy fast. The radar shows the cell's track before it reaches the water.
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 Horwich the map also covers Bolton, Chorley and Wigan.
The path up to Rivington Pike has almost no shelter, and a shower crossing the West Pennine Moors can reach the top well before it reaches Horwich below. Walkers who check the radar before setting out can see whether the pike is already under the band. RainViewer's hyperlocal radar follows the shower as it drops off the moor.
Yes, the road linking Horwich to Bolton slows in heavy rain, and spray builds where the route climbs away from the moor edge. Check the radar before setting off to see whether the cell has reached the high ground. A look at the map shows whether the band is ahead or has cleared already.
Horwich has some surface flooding on low streets after heavy rain on the moors above, since the reservoirs behind the town can run high following prolonged rain. The Middlebrook side of town on lower ground is more exposed to standing water. The radar shows whether a heavy band is still on the moors.
May to September is the best window to visit Horwich, when Rivington Pike and the reservoir walks are at their most pleasant. Summer storms are short but can be heavy on the higher ground. Check the radar in the morning and plan the outdoor part of the day for the dry gap.
The West Pennine Moors behind Horwich lift and wring out the heaviest rain from an approaching band, so Rivington Pike can be wet while Middlebrook on the lower ground towards Bolton stays lighter until the cell drifts down. Live radar shows the edge of each cell, so checking Rivington Pike and the moors and Middlebrook separately shows which side of the line you are on.
A forecast percentage for Horwich gives one number for the whole area, while RainViewer shows the actual shape and position of the rain on the map. Met Office radar covering northern England, using C-band and dual-polarization data, tracks rain bands ahead of the Pennine slopes and tells heavy rain apart from sleet on the tops. That hyperlocal, live picture is what lets you judge a specific street rather than the whole town.
Set a rain alert on Rivington Pike or Middlebrook and RainViewer warns you before rain arrives, which settles whether to head out or wait indoors. The 2-hour forecast in 5-minute slices shows the next gap, and saved locations track Bolton and the reservoirs together.
A walk up to Rivington Pike and an afternoon at Middlebrook both depend on a dry gap, and RainViewer shows the next one.
Rain in Horwich arrives off the Irish Sea in quick bands, and the dry spell between bands is the window that matters.
Your phone forecast says showers in Horwich this afternoon. RainViewer's live hyperlocal radar shows the cell still over Rivington Pike with Middlebrook still dry, and that decides whether the walk starts now.
Track rain in Horwich — free Upgrade to Essential for alerts, forecasts, and full radar history
Slice the next two hours into 5-minute steps and pick the gap for the walk up to Rivington Pike.
An alert on Rivington Pike arrives while the rain is still on its way, and that decides whether to head out or wait indoors.
In Horwich the wet weather tends to come from the west and south-west, off the Irish Sea, and the arrows show the track of every shower.
Scroll back over the moors above the town to see what actually fell overnight.
Track Rivington Pike, Middlebrook and the town centre together and compare which one is dry.