SeasonMapIsle of Wight (Newport IoW) weather in August
United Kingdom
August in Isle of Wight: nice, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Isle of Wight · #458 of 1383 destinations to visit in August · comfort 85/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Isle of Wight in August
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 — August
| Daytime high | 20°C / 69°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 20°C / 68°F | |
| Sea temperature | 18°C / 64°F | 🧊 bracing |
| Rainfall | 51 mm / 2 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 15°C / 58°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 14.5 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Isle of Wight 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 crowdsSummer ferry peak, Cowes Week, Summer holidays in United Kingdom(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).
Best weatherIsle of Wight's weather peaks June–August.
August includes Cowes Week.
Best weatherFair weatherToughest weather
What's on in Isle of Wight in August
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 ↗
- Festival
Cowes Week
28 Jul – 12 Aug · usuallyMajor festivalCrowdedBook earlyEight days of racing in the Solent at the start of August, running since 1826. Cowes itself is unrecognisable for the week and everything on that side of the island is booked out. Source ↗
- Festival
Ventnor Fringe
5–20 Aug · usuallyMajor festivalA week of theatre, music and comedy in halls, a chapel and the old town hall in Ventnor, timed to coincide with the Ventnor Carnival in mid-August. It is the only thing that fills the south coast of the island rather than the north. 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 August — FAQ
- Is August a good time to visit Isle of Wight?
- August in Isle of Wight: nice, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Isle of Wight on SeasonMap's comfort score (85/100).
- What is the weather like in Isle of Wight in August?
- In August, Isle of Wight averages a daily high of 20.3°C and a low of 15.5°C, with about 51.3 mm of rain over roughly 7.3 rainy days.
- What is the air quality in Isle of Wight in August?
- Isle of Wight has a mean US Air Quality Index of about 39 in August.
Other months in Isle of Wight
Compare Isle of Wight in August
Warmer or cooler than Isle of Wight in August
Similar destinations in Northern Europe — August
Within 300 km: Bournemouth's New Forest heather around 1 Aug – 10 Sep, and Brighton's Brighton Pride around 30 Jul – 10 Aug.