Is it raining now in Haverfordwest?
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Last updated: 20:00, 5 Oct 2026
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Rain in Haverfordwest: What You Need to Know
Haverfordwest is the county town of Pembrokeshire, built on steep streets above the tidal Western Cleddau river, with the Norman castle looking down over the water and the Pembrokeshire Coast National Park a short drive to the west. A Haverfordwest rain radar shows this as it happens, and hyperlocal radar is what separates one street from the next.
Weather off the Atlantic and the Irish Sea reaches Haverfordwest with almost nothing to slow it first, so a front can be over the town within the hour of crossing the Pembrokeshire coast, while the steep streets above the Cleddau shed rain fast into the tidal river below. Welsh weather comes from the Atlantic, and the Brecon Beacons, the Cambrian Mountains and Snowdonia force the air upward. Rain totals rise sharply with height, so the South Wales valleys can be much wetter than the coastal plain at Cardiff.
RainViewer tracks Haverfordwest, Wales, using Met Office radar scans that refresh roughly every 5 minutes, so the picture stays current. The live map shows whether a shower is still out over St Brides Bay or already at the castle, which a forecast for Haverfordwest cannot tell you.
Rain by Season in Haverfordwest
Autumn and winter frontal season (September to January)
Atlantic depressions reach the Pembrokeshire coast first, and the Cleddau rises fastest through this stretch of the year. Atlantic depressions and named storms bring persistent rain to the hills, and the valley rivers rise fast on saturated ground. Valley roads, mountain passes and low-lying streets are affected first.
Transition months (February to April)
February to April brings hail, sleet and wet snow over the higher ground, alternating with passing fronts. Forecasts often miss the mark because the showers involved are so narrow, which leaves hill walkers and weekend rugby matches the most exposed to sudden changes. Showers come in off the Irish Sea in quick succession, and a day on the coast is the plan most often caught out.
Summer season (May to August)
From May to August rain becomes less frequent overall, but warm afternoons can still trigger heavy showers and thunderstorms over the hills. Anyone with plans for festivals, coastal trips or mountain walks needs to work around the short dry windows that appear between them. Rain is less frequent, but showers still cross from the sea, and the riverside quay depends on the gaps between them.
Why You Need a Rain Radar in Haverfordwest
Walkers on the Pembrokeshire Coast Path
The coast a short drive from Haverfordwest is fully exposed to Atlantic showers, and a clear morning can turn wet within the hour. Check the radar before setting off for the cliffs.
Haverfordwest Castle and town centre visitors
The steep streets below the castle offer little shelter, and a downpour sends shoppers into the covered market fast. Watch the cell approach and time the walk between the castle and the quay.
Cleddau riverside and quay visitors
The tidal quay below the castle is exposed to wind and rain off the water. Check the radar before a riverside walk or a boat trip.
Commuters on the A40 and A4076
The A40 towards Fishguard and the A4076 towards Milford Haven slow in heavy rain. Check the radar first to see whether leaving now beats waiting.
RainViewer Radar Coverage in Haverfordwest
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 Haverfordwest the map also covers Milford Haven, Fishguard and Narberth.
Haverfordwest Rain Radar: Frequently Asked Questions
- How does rain affect a day on the Pembrokeshire coast near Haverfordwest?
St Brides Bay and the Pembrokeshire Coast Path, a short drive from Haverfordwest, catch Atlantic showers first, and a beach day that starts dry can turn wet within the hour once a band reaches the cliffs. Visitors heading out from the town watch the radar before they leave. RainViewer shows the shower crossing the coast ahead of the Cleddau valley.
- Does rain affect the A40 near Haverfordwest?
Yes, the A40 between Haverfordwest and Fishguard slows in heavy rain, and spray builds on the open stretches away from town. A glance at the radar before you set off helps. The map makes clear whether the shower is still coming or has already cleared.
- Does Haverfordwest flood when it rains?
Yes, the tidal Western Cleddau can rise through Haverfordwest when heavy rain meets a high tide, and the quay and the low streets beside the river are the first to be affected. The steep streets around the castle stay largely clear. The radar shows whether more rain is falling upstream in the Cleddau catchment.
- When is the best time to visit Haverfordwest to avoid rain?
May to September is the best window to visit Haverfordwest, with the castle and the Pembrokeshire coast at their best. Atlantic showers can still reach the coast at any time of year. A morning look at the radar shows where the dry hours fall.
- Why can it rain on the Cleddau quay while the castle streets stays dry around Haverfordwest?
The tidal river can flood the low quay when heavy rain meets a high tide, while the steep streets around the castle above sit well clear of the water and stay dry. RainViewer draws each shower where it actually is, which is why a look at the Cleddau quay and the castle streets can give different answers.
- Can I trust the Haverfordwest rain radar more than my phone's default weather app?
The Haverfordwest rain radar shows what the Met Office radar is measuring right now, while a phone's default weather app usually shows a modelled forecast instead. C-band radar from the Met Office covers the whole of Wales, and its dual-polarization mode separates rain from sleet and hail over high ground such as the Brecon Beacons and the valley heads. That hyperlocal difference is why the radar catches a shower a forecast app misses.
- What can I do with RainViewer in Haverfordwest beyond checking current rain?
Set a rain alert on the castle or the Cleddau quay and RainViewer warns you before rain arrives. That lets you time a walk or a coastal drive. The 2-hour forecast in 5-minute slices shows the next gap, and saved locations track St Brides Bay and the town centre.
Track Rain in Haverfordwest in Real Time
A visit to Haverfordwest Castle and a day on the Pembrokeshire coast both depend on a dry gap, and RainViewer shows the next one.
Showers off the Bristol Channel reach Haverfordwest quickly, and the gap between two bands is the window that matters.
Your phone forecast says showers in Haverfordwest this afternoon. RainViewer's live hyperlocal radar shows the cell still out over St Brides Bay with the castle still dry, which decides whether the coastal drive starts now.
Track rain in Haverfordwest — free Upgrade to Essential for alerts, forecasts, and full radar history
2-hour forecast in 5-minute slices
Two hours of 5-minute steps let you time the walk along the Cleddau quay to the minute.
Rain alerts before arrival
Put an alert on the Cleddau quay. RainViewer warns you minutes ahead, which settles whether to browse the town or head for the coast.
Direction arrows on the map
Rain reaches Haverfordwest most often from the west and south-west, off the Irish Sea and the Bristol Channel, so the arrows tell you at a glance whether a cell is heading your way.
48 hours of radar history
The 48-hour history shows what fell on St Brides Bay, which is the fastest way to judge ground conditions.
Multiple locations
Save the castle, the Cleddau quay and St Brides Bay and check all three in one look.
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