Bristol weather in August
August in Bristol: nice, a little rain, with clean air — an excellent time to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#3 of 12 months in Bristol · #272 of 1413 destinations to visit in August · comfort 89/100 (tier A)
- Days
- 21°C
- Nights
- 14°C
- Wet days
- 10
- Sun
- 9.3 h
- Humidity
- 78%
- Daylight
- 15 h

Traveller notes on Bristol in August
Notes from nearby Bath (19 km away)
Bristol doesn't have its own notes for August yet — these are about Bath, close enough to share the season.
Bath in early and mid August, at a weekend, is one of the busiest places in Britain, and regulars are blunt that nice weather makes it worse rather than better. Their rule for the Roman Baths is that the queue depends entirely on when you turn up - eleven on a Saturday morning is long, four on a wet Tuesday is nothing - which makes a grey afternoon in our 58.7mm, 9.6-day August an asset rather than a loss. The tip worth carrying is seasonal: in July and August only, the Baths stay open until ten at night, and few visitors know it, so a late evening gets you the place almost to yourself. Days are mild at 21.4C over 13.3C. The record: humidity 78 percent, 9.1 hours of sun, 14.5 hours of daylight and AQI 32.
Other months in Bristol
Bristol forum discussions describe the southwest of England's winter as generally milder than much of the rest of the country, staying comparatively pleasant right up through the holidays, with one local poster noting that if a genuinely bitter cold snap is going to arrive, January or February tends to be when. Typical winter daily highs were cited around 10-13C, with Atlantic weather fronts bringing the standard pattern of rain and showers interspersed with real spells of bright winter sunshine. Posters mentioned the Harbourside area specifically as a pleasant spot for a stroll on the clear, sunny winter afternoons that do come through between the wetter stretches.
Bristol forum regulars describe January as damp and grey more than harsh — good old British drizzle is close to guaranteed at some point during a visit, with rain and showers interspersed with bright winter sunshine, and wind that usually comes off the south and west rather than a cold northerly. Some regional discussions cite daytime highs as mild as 10-13°C for the wider southwest England area, though that reads a touch generous for Bristol itself in a typical year. The practical upside regulars name: quieter roads and fewer tourists than any other season, since workers are working and shoppers all spent out after the holidays. Our record: 7.5°C days, 2.3°C nights, 11 rain days and 0.9cm of snow — cool and damp rather than mild, a bit below the warmer end some regional discussions suggest.
The UK forum's consistent line on early July: expect roughly 17°C on average with a real chance of rain, and treat any specific forecast as unreliable more than a few days out. Regulars across the south-west give the same standing advice for a trip to Bristol as anywhere else in Britain in summer — pack for both sun and rain, because a single day can bring either.
Add your own note from Bristol's card on the map.
Bristol climate normals — August
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Bristol in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsBalloon Fiesta, Summer holidays in United Kingdom, school holidays in 6 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Bristol's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherBristol's weather peaks June–August, best around July.
August includes Balloon Fiesta.
Best weatherFair weatherToughest weather
What's on in Bristol in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Festival
Balloon Fiesta
7–9 AugMajor festivalCrowdedMass ascents at dawn and dusk over Ashton Court in early August, with night glows on the Friday and Saturday. Wind cancels ascents at short notice, so plan for more than one slot. Source ↗
Nearby, and something's on
Within 300 km of Bristol — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Bristol?
Bristol in August — FAQ
- Is August a good time to visit Bristol?
- August in Bristol: nice, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Bristol on SeasonMap's comfort score (89/100).
- What is the weather like in Bristol in August?
- In August, Bristol averages a daily high of 21.4°C and a low of 13.9°C, with about 62 mm of rain over roughly 10.1 rainy days.
- What is the air quality in Bristol in August?
- Bristol has a mean US Air Quality Index of about 33 in August.
Within 300 km: Bath's Roman Baths open late on 1 Jul – 31 Aug, and Bournemouth's New Forest heather around 1 Aug – 10 Sep.