SeasonMapSaint Peter Port (Sark) weather in May
Guernsey
May in Saint Peter Port: cool, a little rain, with clean air — an excellent time to visit.
#5 of 12 months in Saint Peter Port · #694 of 1383 destinations to visit in May · comfort 80/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Saint Peter Port in May
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Saint Peter Port climate normals — May
| Daytime high | 13°C / 55°F | 🙂 cool |
|---|---|---|
| Nighttime low | 11°C / 52°F | |
| Sea temperature | 13°C / 55°F | 🥶 cold sea |
| Rainfall | 38 mm / 1.5 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 12.2 h/day | |
| Daylight | 15.4 h | |
| Wind | 32 km/h / 20 mph | |
| Air quality (US AQI) | 47 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Saint Peter Port in May
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.
BusyLiberation Day, school holidays in 4 of the markets that fill it(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).
Fair weatherSaint Peter Port's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Saint Peter Port in May
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 ↗
- Holiday
Liberation Day
9 MayNational holidayCrowdedClosuresGuernsey's own holiday on 9 May: a cavalcade along the seafront, period dress, and the whole island out on the harbour front. Shops and offices are closed and the boats run a holiday timetable. 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 May — FAQ
- Is May a good time to visit Saint Peter Port?
- May in Saint Peter Port: cool, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Saint Peter Port on SeasonMap's comfort score (80/100).
- What is the weather like in Saint Peter Port in May?
- In May, Saint Peter Port averages a daily high of 12.5°C and a low of 11.2°C, with about 38.4 mm of rain over roughly 8 rainy days.
- What is the air quality in Saint Peter Port in May?
- Saint Peter Port has a mean US Air Quality Index of about 47 in May.
Other months in Saint Peter Port
Compare Saint Peter Port in May
Warmer or cooler than Saint Peter Port in May
Similar destinations in Western Europe — May
Within 300 km: Bath's The Bath Festival on 16–24 May, and St Ives' Food and Drink Festival on 15–17 May.