SeasonMapBrighton weather in September
United Kingdom
September in Brighton: nice, a little rain, with clean air — a great time to visit.
#5 of 12 months in Brighton · #828 of 1383 destinations to visit in September · comfort 75/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Brighton in September
Other months in Brighton
Brighton's forum is honest that August is no sure thing — regulars describe swings from a cool, rainy week in the mid-60s°F to a properly hot one in the high 80s within the same summer. The one constant: it's a pebble beach, not sand, and the water stays cold enough that most visitors manage no more than a quick dip even in August.
Add your own note from Brighton's card on the map.
Brighton climate normals — September
| Daytime high | 20°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 11°C / 51°F | |
| Feels like (high) | 18°C / 64°F | |
| Sea temperature | 19°C / 67°F | 🌊 fresh |
| Rainfall | 64 mm / 2.5 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 8.5 h/day | |
| Daylight | 12.6 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Brighton in September
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 crowdsBeach season, London day-trippers, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Brighton'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).
Fair weatherBrighton's weather peaks June–August.
Best weatherFair weatherToughest weather
What's on in Brighton in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Beach season
1 Jun – 15 Sep · usuallySea warm enoughCrowdedDay trippers from London fill the pebbles on any warm weekend and the trains down are rationed by capacity rather than timetable. The sea is swimmable but never warm.
- Season
London day-trippers
20 Jun – 5 Sep · usuallyDay-tripper crushCrowdedAn hour from Victoria and the beach fills on any warm weekend; the last trains back go standing and the Lanes are shoulder to shoulder from noon. Weekday mornings are another city. Source ↗
Nearby, and something's on
Within 300 km of Brighton — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Brighton?
Brighton in September — FAQ
- Is September a good time to visit Brighton?
- September in Brighton: nice, a little rain, with clean air — a great time to visit. It ranks #5 of 12 months for Brighton on SeasonMap's comfort score (75/100).
- What is the weather like in Brighton in September?
- In September, Brighton averages a daily high of 19.5°C and a low of 10.7°C, with about 64.2 mm of rain over roughly 10.8 rainy days.
- What is the air quality in Brighton in September?
- Brighton has a mean US Air Quality Index of about 45 in September.
Other months in Brighton
Compare Brighton in September
Warmer or cooler than Brighton in September
Similar destinations in Northern Europe — September
Within 300 km: Bournemouth's New Forest heather around 1 Aug – 10 Sep, and Bath's Jane Austen Festival on 11–20 Sep.