SeasonMapSaint Peter Port (Sark) weather in August
Guernsey
August in Saint Peter Port: nice, a little rain, with clean air — one of the best months to visit.
#2 of 12 months in Saint Peter Port · #421 of 1383 destinations to visit in August · comfort 86/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Saint Peter Port in August
Notes from nearby Bournemouth (148 km away)
Saint Peter Port doesn't have its own notes for August yet — these are about Bournemouth, close enough to share the season.
August in Bournemouth is the peak of everything. A good day can reach the mid-to-high 20s°C, though the monthly average high sits nearer 21, with the sea around 17°C. The forum's real subject, though, is volume: a very hot summer's day brings roughly 80,000 people to the beach, and an airshow day upwards of 250,000. Regulars advise avoiding the Pier area for crowding and parking and heading to Southbourne, Christchurch and Hengistbury Head, or Mudeford instead. Two August fixtures worth timing around: fireworks off the pier every Friday night from late July to the end of August, and the Wednesday candlelight evenings in the lower gardens.
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Saint Peter Port climate normals — August
| Daytime high | 18°C / 64°F | 😎 nice |
|---|---|---|
| Nighttime low | 17°C / 62°F | |
| Sea temperature | 18°C / 64°F | 🧊 bracing |
| Rainfall | 48 mm / 1.9 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 15°C / 59°F | |
| Sunshine | 11.3 h/day | |
| Daylight | 14.4 h | |
| Wind | 31 km/h / 19 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 Saint Peter Port 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.
Busyschool holidays in 7 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Saint Peter Port'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 weatherSaint Peter Port's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Saint Peter Port in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Herm and Sark boat season
15 Apr – 15 Oct · usuallySummer season opensThe small boats to Herm, Sark and Alderney run frequently from the harbour through the season and thin out sharply after October. Half the reason to be based here is the day you spend on another island. Source ↗
Nearby, and something's on
Within 300 km of Saint Peter Port — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Saint Peter Port?
Saint Peter Port in August — FAQ
- Is August a good time to visit Saint Peter Port?
- August in Saint Peter Port: nice, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for Saint Peter Port on SeasonMap's comfort score (86/100).
- What is the weather like in Saint Peter Port in August?
- In August, Saint Peter Port averages a daily high of 17.8°C and a low of 16.6°C, with about 47.6 mm of rain over roughly 8 rainy days.
- What is the air quality in Saint Peter Port in August?
- Saint Peter Port has a mean US Air Quality Index of about 42 in August.
Other months in Saint Peter Port
Compare Saint Peter Port in August
Warmer or cooler than Saint Peter Port in August
Similar destinations in Western Europe — August
Within 300 km: Bournemouth's New Forest heather around 1 Aug – 10 Sep, and Isle of Wight's Cowes Week around 28 Jul – 12 Aug.