AI-generatedSaint Helier at a glance
- Best time
- Jun – Sep
- Warmest month
- Aug · 19°
- Warmest sea
- Aug · 18.0°
- Sunshine a year
- 1,870 h
- Rain a year
- 827 mm
- Climate
- Maritime
- Time zone
- UTC+0 / UTC+1
- Elevation
- 11 m
Climate in Saint Helier
Saint Helier has a maritime climate with moderate summers and cool, often grey winters. August is the warmest month with average highs of 19 °C, while February is the coolest at 9 °C. With around 1,870 hours of sunshine a year, Saint Helier is moderately sunny; July is the sunniest month with 8.0 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Fair
Best time to visit: June – September
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 14°
- Midday, 13:00: about 15°
- Afternoon, 16:00: about 15°
- Evening, 20:00: about 14°
- Night, 23:00: about 14°
07:2718:21
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:08–08:11 · evening 17:37–18:40
- Blue hour
- Morning 06:55–07:08 · evening 18:40–18:53
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Saint Helier in October?
In October, Saint Helier is cool: daytime highs average 16 °C, and nights cool down to about 13 °C. The sea averages 16.2 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. It rains often – on about 15 days, adding up to 95 mm. It is often windy, with gusts of around 29 km/h. All in all, October is a so-so month for a holiday in Saint Helier.
More details for October
- Daylight
- 10 h 53 min07:27 – 18:21
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 29 km/haverage daily peakAll months
- Cloud cover
- 71 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+1Europe/Jersey
How the score comes together
- Temperatureweight 50 %75 %
- Sunshineweight 20 %12 %
- Few rainy daysweight 30 %23 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
- Windproof jacket
Sea temperature in Saint Helier
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 15.5 – 16.8 °C
Swimming season: Never above 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Saint Helier ranges from 8.9 °C in February to 18.0 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
From October to January the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 17.5 and 18.8 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 9.7° | 8.6° | 10.4° | cold |
| FebruaryFeb | 8.9° | 8.0° | 9.7° | cold |
| MarchMar | 8.9° | 7.7° | 9.8° | cold |
| AprilApr | 10.3° | 9.3° | 11.2° | cold |
| MayMay | 12.3° | 11.4° | 13.1° | cold |
| JuneJun | 14.7° | 14.2° | 15.5° | cold |
| JulyJul | 16.8° | 16.0° | 17.6° | cold |
| AugustAug | 18.0° | 17.5° | 18.8° | fresh |
| SeptemberSep | 17.7° | 17.1° | 18.4° | fresh |
| OctoberOct | 16.2° | 15.5° | 16.8° | cold |
| NovemberNov | 13.8° | 13.0° | 14.6° | cold |
| DecemberDec | 11.3° | 10.7° | 12.0° | cold |
Sunshine hours in Saint Helier
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 3.7 of 10.9 hours of daylight in Saint Helier, 34 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Saint Helier
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 2 · lowLittle protection needed; sunglasses on bright days.
The sun is strongest in June (UV 8).
Minutes until sunburn in October
- Very fair skin
- about 60 min
- Fair skin
- about 75 min
- Light brown skin
- about 100 min
- Olive skin
- over 2 h
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Saint Helier: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Saint Helier has about 15 rainy days with 95 mm of rain in total.
Wind and clouds in Saint Helier
How breezy and how cloudy Saint Helier is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Saint Helier typically peaks at 29 km/h during the day: Beaufort 5, fresh breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting, and here it gets there all year.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 71 % of the sky over Saint Helier: mostly cloudy, with about 3.7 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Saint Helier
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
CoolOctober: nights around 13°. A duvet at night and a jumper for the evening.
The coolest nights are in February (7°), the warmest in August (16°). Nights are pleasant for sleeping (15 to 20 °C) from July to September. Nights fall below 8 °C on average from January to March, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 13 | 9° | 7° | 9.7° | 2.2 h | 14 | 85 |
| FebruaryFeb | 18 | 9° | 7° | 8.9° | 3.2 h | 12 | 66 |
| MarchMar | 27 | 10° | 7° | 8.9° | 4.5 h | 12 | 59 |
| AprilApr | 46 | 11° | 9° | 10.3° | 6.6 h | 10 | 49 |
| MayMay | 59 | 14° | 11° | 12.3° | 7.4 h | 11 | 52 |
| JuneJun | 75 | 16° | 14° | 14.7° | 7.9 h | 10 | 53 |
| JulyJul | 85 | 18° | 16° | 16.8° | 8.0 h | 10 | 48 |
| AugustAug | 80 | 19° | 16° | 18.0° | 7.2 h | 11 | 60 |
| SeptemberSep | 77 | 18° | 15° | 17.7° | 6.1 h | 10 | 59 |
| OctoberOct | 47 | 16° | 13° | 16.2° | 3.7 h | 15 | 95 |
| NovemberNov | 27 | 12° | 10° | 13.8° | 2.6 h | 16 | 100 |
| DecemberDec | 16 | 10° | 8° | 11.3° | 2.0 h | 16 | 103 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
49.19° N, 2.10° W · 11 m · Europe/Jersey
Best time to visit Saint Helier
The best time to visit Saint Helier is from June to September. The sea stays too cool for a classic beach holiday: even in August it only reaches 18.0 °C. For sightseeing, day trips and hiking, conditions are most comfortable from June to September. Rain is most frequent from October to February; the wettest month is December with 103 mm.
Saint Helier through the seasons
How the weather changes over the seasons, with averages for each.
Saint Helier in spring
Mar – May
Fair
- 10–14 °C by day
- Sea 11 °C
- 6 h of sun a day
- 33 rainy days in all
Saint Helier in summer
Jun – Aug
Excellent
- 16–19 °C by day
- Sea 17 °C
- 8 h of sun a day
- 30 rainy days in all
Saint Helier in autumn
Sep – Nov
Fair
- 12–18 °C by day
- Sea 16 °C
- 4 h of sun a day
- 40 rainy days in all
Saint Helier in winter
Dec – Feb
Poor
- 9–10 °C by day
- Sea 10 °C
- 3 h of sun a day
- 42 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Saint Helier for you.
Your best months: July – September
Based on the climate averages; tap a month to see its details.
Compare two months in Saint Helier
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
July has the better holiday weather in Saint Helier: score 85 against 47. In July, days are 2 °C warmer than in October. The sea is 1 °C warmer in July. July has 5 fewer rainy days. The sun shines 4 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Weather score | 47 | 85better |
| Day high | 16° | 18° |
| Night low | 13° | 16° |
| Sea | 16.2° | 16.8° |
| Sunshine | 3.7 h | 8.0 hbetter |
| Rainy days | 15 | 10better |
| Rainfall | 95 mm | 48 mmbetter |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Jun – Sep
15–28 °C and not too much rain
Rainy months
Oct – Feb
12 or more rainy days
Saint Helier month by month
The typical weather for every month at a glance.
13January9° · Sea 10° · 2 h
In January, Saint Helier is cold: daytime highs average 9 °C, and nights cool down to about 7 °C. The sea averages 9.7 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. It rains often – on about 14 days, adding up to 85 mm. It is often windy, with gusts of around 32 km/h. All in all, January is not an ideal month for a holiday in Saint Helier.
Saint Helier in January18February9° · Sea 9° · 3 h
In February, Saint Helier is cold: daytime highs average 9 °C, and nights cool down to about 7 °C. The sea averages 8.9 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 12 rainy days and 66 mm in total. It is often windy, with gusts of around 31 km/h. All in all, February is not an ideal month for a holiday in Saint Helier.
Saint Helier in February27March10° · Sea 9° · 5 h
In March, Saint Helier is cold: daytime highs average 10 °C, and nights cool down to about 7 °C. The sea averages 8.9 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 59 mm in total. All in all, March is not an ideal month for a holiday in Saint Helier.
Saint Helier in March46April11° · Sea 10° · 7 h
In April, Saint Helier is cool: daytime highs average 11 °C, and nights cool down to about 9 °C. The sea averages 10.3 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 10 rainy days and 49 mm in total. All in all, April is a so-so month for a holiday in Saint Helier.
Saint Helier in April59May14° · Sea 12° · 7 h
In May, Saint Helier is cool: daytime highs average 14 °C, and nights cool down to about 11 °C. The sea averages 12.3 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 52 mm in total. All in all, May is a so-so month for a holiday in Saint Helier.
Saint Helier in May75June16° · Sea 15° · 8 h
In June, Saint Helier is mild: daytime highs average 16 °C, and nights cool down to about 14 °C. The sea averages 14.7 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. Rain is frequent, with about 10 rainy days and 53 mm in total. All in all, June is a good month for a holiday in Saint Helier.
Saint Helier in June85July18° · Sea 17° · 8 h
In July, Saint Helier is mild: daytime highs average 18 °C, and nights cool down to about 16 °C. The sea averages 16.8 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. Rain is frequent, with about 10 rainy days and 48 mm in total. All in all, July is an excellent month for a holiday in Saint Helier.
Saint Helier in July80August19° · Sea 18° · 7 h
In August, Saint Helier is mild: daytime highs average 19 °C, and nights cool down to about 16 °C. The sea averages 18.0 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 60 mm in total. All in all, August is an excellent month for a holiday in Saint Helier.
Saint Helier in August77September18° · Sea 18° · 6 h
In September, Saint Helier is mild: daytime highs average 18 °C, and nights cool down to about 15 °C. The sea averages 17.7 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 59 mm in total. All in all, September is a good month for a holiday in Saint Helier.
Saint Helier in September47October16° · Sea 16° · 4 h
In October, Saint Helier is cool: daytime highs average 16 °C, and nights cool down to about 13 °C. The sea averages 16.2 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. It rains often – on about 15 days, adding up to 95 mm. It is often windy, with gusts of around 29 km/h. All in all, October is a so-so month for a holiday in Saint Helier.
Saint Helier in October27November12° · Sea 14° · 3 h
In November, Saint Helier is cool: daytime highs average 12 °C, and nights cool down to about 10 °C. The sea averages 13.8 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. It rains often – on about 16 days, adding up to 100 mm. It is often windy, with gusts of around 31 km/h. All in all, November is not an ideal month for a holiday in Saint Helier.
Saint Helier in November16December10° · Sea 11° · 2 h
In December, Saint Helier is cool: daytime highs average 10 °C, and nights cool down to about 8 °C. The sea averages 11.3 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. It rains often – on about 16 days, adding up to 103 mm. It is often windy, with gusts of around 32 km/h. All in all, December is not an ideal month for a holiday in Saint Helier.
Saint Helier in DecemberSaint Helier compared
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Saint Helier vs. Saint Peter Port
In October the holiday weather in Saint Helier and Saint Peter Port is about equally good (score 47 vs. 47). During the day it is about as warm in Saint Peter Port as in Saint Helier. The sea is about equally warm.
| in October | Saint Helier | Saint Peter Port |
|---|---|---|
| Holiday score | 47 | 47 |
| Daytime high | 16° | 16° |
| Sea | 16° | 16° |
| Sunshine | 4 h | 4 h |
| Rainy days | 15 | 15 |
| Best time | Jun – Sep | Jun – Sep |
Through the year
Planning a trip to Saint Helier
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Saint Helier in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Saint Helier has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 15).
- 40
Easter holidays
Mar – Apr
Fair
- 11 °C by day
- Sea 10 °C
- 6.0 h of sun a day
- 11 rainy days a month
- 62
May half-term
May – Jun
Good
- 14 °C by day
- Sea 13 °C
- 7.5 h of sun a day
- 11 rainy days a month
- 82
Summer holidays
Jul – Aug
ExcellentBest holidays
- 18 °C by day
- Sea 18 °C
- 7.5 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 47
October half-term
Oct
Fair
- 16 °C by day
- Sea 16 °C
- 3.7 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain
- 15
Christmas holidays
Dec – Jan
Poor
- 10 °C by day
- Sea 11 °C
- 2.1 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- Short trip – train or car is often quicker
- Distance
- 280 km
- Time zone
- UTC+1
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Saint Helier
When is the best time to visit Saint Helier?
The best time to visit Saint Helier is from June to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Saint Helier?
The sea temperature in Saint Helier ranges from 8.9 °C in February to 18.0 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Saint Helier in October?
Only if you don't mind cold water: in October the sea averages just 16.2 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Saint Helier?
August is the warmest month, with average highs of 19 °C and nights around 16 °C. February is the coolest month at 9 °C.
When does it rain most in Saint Helier?
Rain is most frequent from October to February; the wettest month is December with 103 mm. The driest month is July with 48 mm.
How many hours of sunshine does Saint Helier get?
Saint Helier gets around 1,870 hours of sunshine a year. The sunniest month is July with 8.0 hours a day; in December there are 2.0 hours a day.
What time zone is Saint Helier in?
Saint Helier uses the time zone Europe/Jersey: UTC+0 in January and UTC+1 in July.
Which school holidays are best for Saint Helier?
Saint Helier has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 15). Holiday ratings (0–100): Easter holidays 40, May half-term 62, Summer holidays 82, October half-term 47, Christmas holidays 15.
Near Saint Helier
Other destinations close by.
Places with a climate like Saint Helier
Destinations whose weather through the year is closest to Saint Helier's – good alternatives.