Saint Peter Port weather by month & the best time to visit
Guernsey · seaside town · oceanic / maritime climate
The best time to visit Saint Peter Port is September — its sunniest month (Sunshine Score 61/100), with August and July close behind. Saint Peter Port averages about 1,931 hours of sunshine a year. Daytime highs around 17°C / 63°F and roughly 47 mm of rain in September.
When is the best time to visit Saint Peter Port?
For sunshine, the best time to visit Saint Peter Port is September, then August and July. The dullest month is January (6/100, 96 mm of rain). The full month-by-month picture is in the table below.
How sunny is Saint Peter Port?
Saint Peter Port gets a moderate 1,931 hours of sunshine a year. 55 Sunshine Score points separate September (61) from January (6), so the month you pick matters. It is the less sunny of the two destinations tracked in Guernsey. The year's 849 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 6 | 9° / 48°F | 8° / 46°F | 96 mm | 0 | 11° / 52°F |
| February | 6 | 9° / 48°F | 7° / 45°F | 79 mm | 1 | 10° / 50°F |
| March | 6 | 9° / 48°F | 7° / 45°F | 69 mm | 2 | 10° / 50°F |
| April | 14 | 10° / 50°F | 9° / 48°F | 47 mm | 4 | 11° / 52°F |
| May | 27 | 12° / 54°F | 11° / 52°F | 51 mm | 5 | 13° / 55°F |
| June | 41 | 14° / 57°F | 13° / 55°F | 47 mm | 6 | 15° / 59°F |
| July | 54 | 16° / 61°F | 15° / 59°F | 47 mm | 6 | 17° / 63°F |
| August | 60 | 17° / 63°F | 16° / 61°F | 54 mm | 5 | 18° / 64°F |
| September | 61 | 17° / 63°F | 15° / 59°F | 47 mm | 4 | 17° / 63°F |
| October | 42 | 15° / 59°F | 13° / 55°F | 96 mm | 2 | 16° / 61°F |
| November | 29 | 13° / 55°F | 11° / 52°F | 110 mm | 1 | 15° / 59°F |
| December | 12 | 10° / 50°F | 9° / 48°F | 106 mm | 0 | 13° / 55°F |
Sea temperature in Saint Peter Port by month
The sea off Saint Peter Port is warmest in August at around 18°C / 64°F, and coolest in February at 10°C / 50°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
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Head-to-head
How Saint Peter Port compares month by month: Saint Peter Port vs Caen · Saint Peter Port vs Brest · Saint Peter Port vs Exeter · Saint Peter Port vs Jersey · all comparisons
Saint Peter Port: questions and answers
What kind of destination is Saint Peter Port?
Saint Peter Port is a seaside town in Guernsey with a oceanic / maritime climate — the sea reaches 18°C at its warmest.
How many hours of sunshine does Saint Peter Port get a year?
Saint Peter Port gets about 1,931 hours of sunshine a year, at its best around September.
When is the best time to visit Saint Peter Port?
The sunniest time to visit Saint Peter Port is September, when the Sunshine Score peaks at 61/100 (with August and July close behind). Expect daytime highs around 17°C / 63°F.
What is the least sunny month in Saint Peter Port?
January is the least sunny month in Saint Peter Port, scoring 6/100 with about 96 mm of rain.
What is the sea temperature in Saint Peter Port?
The sea in Saint Peter Port ranges from about 10°C (February) to 18°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Saint Peter Port?
The typical midday UV index in Saint Peter Port peaks around 6 (high) in June, easing to about 0 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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