Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in St Peter Port is from July, August, September. — consistent weather climate
🌥Mild
| Score | 7 | 12 | 19 | 34 | 46 | 64 | 78 | 74 | 65 | 44 | 16 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Cold | Cold | Cold | Cold | Mild | Mild | Mild | Mild | Mild | Cool & rainy | Cool & rainy | Cold |
| Temperature | 8–10°C | 8–10°C | 8–10°C | 9–11°C | 11–13°C | 14–15°C | 16–17°C | 16–18°C | 16–17°C | 14–16°C | 11–13°C | 10–12°C |
| Feels like | 1–5°C | 1–5°C | 2–5°C | 4–8°C | 7–11°C | 10–14°C | 13–16°C | 14–17°C | 12–16°C | 9–13°C | 5–9°C | 3–7°C |
| Precipitation | 121mm 20 days | 83mm 16 days | 75mm 15 days | 41mm 8 days | 45mm 8 days | 45mm 8 days | 38mm 7 days | 71mm 9 days | 68mm 11 days | 123mm 16 days | 138mm 23 days | 131mm 22 days |
| Sunshine | 3.6h ☀︎ 41% | 5.0h ☀︎ 49% | 7.0h ☀︎ 58% | 10.7h ☀︎ 78% | 11.8h ☀︎ 77% | 12.3h ☀︎ 76% | 12.5h ☀︎ 79% | 10.9h ☀︎ 76% | 9.6h ☀︎ 76% | 6.7h ☀︎ 62% | 4.2h ☀︎ 46% | 3.2h ☀︎ 39% |
| Wind | W · 44 km/h | SW · 44 km/h | SW · 40 km/h | NE · 33 km/h | NW · 31 km/h | NW · 29 km/h | W · 29 km/h | W · 31 km/h | W · 34 km/h | SW · 39 km/h | W · 45 km/h | SW · 45 km/h |
| Humidity (%) | 78% | 79% | 80% | 80% | 85% | 87% | 86% | 85% | 80% | 79% | 77% | 80% |
| Day length | 8.7h | 10.1h | 11.9h | 13.8h | 15.4h | 16.2h | 15.8h | 14.4h | 12.6h | 10.8h | 9.1h | 8.2h |
Guernsey's biggest annual public holiday, on 9 May, commemorates the island's liberation from German occupation in 1945…
Guernsey's long-running floral parade features elaborate flower-covered floats built by local groups, held each August a…
Guernsey's capital never actually empties out, but its climate swings from raw Atlantic soak to radiant maritime warmth; visiting anywhere outside high summer means braving relentless damp without gaining a single empty street.
Tucked into the eastern hillside of Guernsey, St Peter Port—known simply to islanders as 'town'—rises from the waterline in a tangle of steep granite stairways, terraced gardens, and narrow lanes that overlook the harbour toward Herm and Sark. People come here for a particular maritime cadence: the island fortress guarding the roadstead, the French exile history hanging over the upper slopes, and the rhythm of ferries docking against granite piers. Yet St Peter Port holds a trap for travellers accustomed to Mediterranean or mainland travel patterns. Because the town is both the financial engine and administrative heart of the Bailiwick, the narrow streets remain packed with local commuters, business travellers, and visitors nearly year-round. You cannot escape crowds by coming in the off-season. Instead, you merely trade long daylight hours and shimmering blue seas for gale-swept drizzle and biting Channel winds.
July and August are the indisputable high-water mark of St Peter Port. The conventional travel instinct to avoid peak summer breaks down completely here. July brings the clearest skies, the longest days, and the most stable seas of the year, while August pushes afternoon temperatures to their balmiest levels. With more than twelve hours of bright sun filtering down across the harbour each day in July, the granite walls of Castle Cornet reflect heat rather than damp chill, and the terraced beds at Candie Gardens bloom in full force.
Walking the steep climbs becomes an effortless pleasure when the air sits in the comfortable high teens and the Atlantic breeze behaves like a cooling draft rather than an onslaught. Down at the waterline, Albert Pier fills with strolling pedestrians watching the inter-island ferries manoeuvre against the tides. August also brings the town's beloved Battle of Flowers, when elaborate floral floats parade through the streets, turning the hillside parish into an energetic showcase of local craftsmanship and communal celebration. While August sees slightly more afternoon shower potential than July, it remains delightfully dry compared to the rest of the year. If you want the Channel Islands of postcards—sparkling turquoise waters, luminous gardens, and pleasant evening strolls along Hauteville—this is the singular window that delivers on the promise.
September maintains a pleasant warmth in the seawater and carries through the gentle temperatures of late summer, but the island begins to tilt visibly into autumn. The days shorten quickly, and while early September can offer quiet, golden afternoons along the harbour wall, the atmosphere turns noticeably heavier. By October, the Atlantic weather engine revs up in earnest. Rain volume nearly doubles, arriving not in brief showers, but in rolling ocean squalls that lash the exposed eastern slopes.
Yet the crowds do not vanish. St Peter Port remains busy through October, with business traffic and local commerce filling the steep lanes of the town centre even as the wind tears through the trees around Candie Gardens. Moving through town requires waterproof gear and careful footing on slick stone steps. The warmth that lingers is deceptive: a raw ocean dampness seeps into your clothes the moment you stop walking, and views across the Little Russel channel toward the smaller islands often disappear into a wall of low grey cloud.
From November through March, St Peter Port enters its most punishing seasonal phase. The ocean winds drive a persistent, pervasive drizzle across the parish, depositing heavy volumes of moisture that keep the granite permanently slick and the air feeling far colder than the thermometer indicates. With apparent temperatures hovering around five degrees for months on end and winter days offering barely three to four hours of weak sun, the town's open staircases and exposed ramparts become an endurance test.
This is the period to avoid entirely. What makes winter particularly unrewarding is that St Peter Port does not enjoy a peaceful off-season hibernation. The streets remain bustling with islanders, the traffic along the seafront stays thick, and local life carries on at full volume under leaden skies. Castle Cornet stands desolate against frothing grey seas, and walking up the hill to Hauteville House means fighting ocean gales that funnel directly up the narrow streets. You endure all the friction of a busy commercial hub without any of the maritime radiance that makes the island special.
April brings a welcome drying out, cutting the winter deluge in half and restoring expansive daylight hours to the Channel. The town begins to look outward again. May marks the definitive arrival of the vibrant outdoor season, anchored by Liberation Day on May 9. As Guernsey’s most significant civic celebration, it fills the harbour quays with parades, brass bands, and islanders commemorating freedom from wartime occupation. The spirit in town is electric, even if the spring air still retains a crisp Channel bite.
June ramps up the sunlight to twelve hours a day and steadily lifts afternoon temperatures into comfortable territory. The town's gardens burst into lush colour, and ferry traffic to Herm and Sark hums with activity. While the waters remain cool for swimming, June offers the finest hiking conditions along the parish boundaries, with bright skies, dry coastal paths, and long, lingering twilights that illuminate the boats moored in the marina long after dinner.