SeasonMapIsle of Wight (Newport IoW) weather in September
United Kingdom
September in Isle of Wight: nice, a little rain, with clean air — a great time to visit.
#5 of 12 months in Isle of Wight · #836 of 1383 destinations to visit in September · comfort 75/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Isle of Wight in September
Other months in Isle of Wight
The forum's line on July is that the island runs a little kinder than the mainland — regulars who have come every July for decades describe usually just the odd bad day — but they are equally clear there is no predicting it: 15°C, 25°C or 35°C are all on the table, so check the forecast three to five days out rather than pack on hope. The real July averages are mild rather than hot, near 21°C with lows around 15, and the sea is a bracing 16°C. Two local pointers worth having: the west side of the island is usually the warmer half, and Ventnor is the summer base while Ryde suits the off-season.
Year-round notes are on Isle of Wight's overview. Add your own note from Isle of Wight's card on the map.
Isle of Wight climate normals — September
| Daytime high | 19°C / 66°F | 😎 nice |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Feels like (high) | 17°C / 63°F | |
| Sea temperature | 19°C / 66°F | 🧊 bracing |
| Rainfall | 62 mm / 2.5 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 8.6 h/day | |
| Daylight | 12.6 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Isle of Wight 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.
BusySummer ferry peak, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Isle of Wight'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 weatherIsle of Wight's weather peaks June–August.
Best weatherFair weatherToughest weather
What's on in Isle of Wight in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Summer ferry peak
20 Jul – 1 SepSchool holidaysCrowdedBook earlyCar ferry fares roughly double for the English school holidays and the crossings sell out days ahead. Booking the boat matters more here than booking the bed. Source ↗
Nearby, and something's on
Within 300 km of Isle of Wight — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Isle of Wight?
Isle of Wight in September — FAQ
- Is September a good time to visit Isle of Wight?
- September in Isle of Wight: nice, a little rain, with clean air — a great time to visit. It ranks #5 of 12 months for Isle of Wight on SeasonMap's comfort score (75/100).
- What is the weather like in Isle of Wight in September?
- In September, Isle of Wight averages a daily high of 18.7°C and a low of 13.9°C, with about 62.4 mm of rain over roughly 8.6 rainy days.
- What is the air quality in Isle of Wight in September?
- Isle of Wight has a mean US Air Quality Index of about 42 in September.
Other months in Isle of Wight
Compare Isle of Wight in September
Warmer or cooler than Isle of Wight 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.