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Weather in Saint Helier — today

Tomorrow Day after tomorrow 3 days Week 14 days Month forecast Weather archive

Now in Saint Helier

☁️

+15°

Overcast

Feels like +16° · humidity 89%

Today 12.9: +20° / +15°

🕐 06:25

Wind

2 km/h

UV index

Air (AQI)

25 · Good

Precipitation

Humidity

89%

Pressure

1025 hPa

Sunrise / sunset

06:40 / 19:27

Sea temperature

🌊 +20°

👕 What to wear today

Comfortable — a T-shirt, a light sweater for the evening.

Weather for an activity:

🎣 fishing 🏖️ the beach 🏃 a run 📸 a photo shoot 🚶 a walk

Detailed weather information for Saint Helier

Today, 12 September, Saturday, in Saint Helier (Jersey): partly cloudy, moderately warm. During the day the air will warm up to +20°, at night around +15°. Due to the wind it feels like +16°. Wind up to 16 km/h. No precipitation expected, you won't need an umbrella. A T-shirt is comfortable during the day, but take a light sweater or windbreaker for the evening. Water temperature is +20° — you can swim. The sun will rise at 06:40 and set at 19:27 — daylight lasts 13 hours.

Hourly weather in Saint Helier

💧 No precipitation expected on this day. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).

Weather in Saint Helier for 14 days

Tap a day to expand it by time of day and open the full forecast. The bar shows the range from the night low (left) to the day high (right).

▶

Today 12.9

☁️

+15° +20°

Morning

☁️

+17°

Day

☁️

+20°

Evening

🌇

+19°

Night

🌙

+15°

Overcast · precipitation 0% · wind up to 16 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Tomorrow 13.9

☁️

💧 8%

+18° +22°

Morning

☁️

+18°

Day

☁️

+22°

Evening

🌇

+20°

Night

🌙

+18°

Overcast · precipitation 8% · wind up to 16 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Mon 14.9

☁️

+18° +23°

Morning

☁️

+20°

Day

☁️

+23°

Evening

🌇

+22°

Night

🌙

+18°

Overcast · precipitation 0% · wind up to 10 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Tue 15.9

☁️

💧 5%

+17° +20°

Morning

☁️

+18°

Day

☁️

+20°

Evening

🌇

+19°

Night

🌙

+17°

Overcast · precipitation 5% · wind up to 29 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Wed 16.9

🌦️

💧 5%

+16° +18°

Morning

🌦️

+17°

Day

🌦️

+18°

Evening

🌇

+18°

Night

🌙

+16°

Drizzle · precipitation 5% · wind up to 28 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Thu 17.9

🌦️

💧 28%

+16° +17°

Morning

🌦️

+16°

Day

🌦️

+17°

Evening

🌇

+17°

Night

🌙

+16°

Drizzle · precipitation 28% · wind up to 38 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Fri 18.9

🌦️

💧 16%

+16° +18°

Morning

🌦️

+17°

Day

🌦️

+18°

Evening

🌇

+18°

Night

🌙

+16°

Drizzle · precipitation 16% · wind up to 31 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Sat 19.9

🌦️

💧 23%

+16° +19°

Morning

🌦️

+17°

Day

🌦️

+19°

Evening

🌇

+18°

Night

🌙

+16°

Drizzle · precipitation 23% · wind up to 32 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Sun 20.9

🌦️

💧 16%

+17° +20°

Morning

🌦️

+18°

Day

🌦️

+20°

Evening

🌇

+19°

Night

🌙

+17°

Drizzle · precipitation 16% · wind up to 29 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Mon 21.9

🌦️

💧 16%

+17° +19°

Morning

🌦️

+18°

Day

🌦️

+19°

Evening

🌇

+19°

Night

🌙

+17°

Drizzle · precipitation 16% · wind up to 29 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Tue 22.9

🌦️

💧 13%

+15° +17°

Morning

🌦️

+16°

Day

🌦️

+17°

Evening

🌇

+17°

Night

🌙

+15°

Drizzle · precipitation 13% · wind up to 33 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Wed 23.9

☁️

💧 11%

+14° +16°

Morning

☁️

+15°

Day

☁️

+16°

Evening

🌇

+16°

Night

🌙

+14°

Overcast · precipitation 11% · wind up to 30 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Thu 24.9

☁️

💧 10%

+13° +17°

Morning

☁️

+14°

Day

☁️

+17°

Evening

🌇

+16°

Night

🌙

+13°

Overcast · precipitation 10% · wind up to 14 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Fri 25.9

☁️

💧 11%

+13° +18°

Morning

☁️

+15°

Day

☁️

+18°

Evening

🌇

+17°

Night

🌙

+13°

Overcast · precipitation 11% · wind up to 24 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

🗺️ Precipitation radar

Precipitation radar (RainViewer) over a clean base map — updates every 5–10 minutes. Colours show nearby precipitation; if there is none, the map is simply clear — that is normal. Zoom with + / −.

Rain intensity:lightmoderateheavy

🎯 What to do in this weather — indices of the day

Comfort score from 0 (bad) to 100 (excellent), calculated from the day's weather. For “rain” and “UV” a percentage/risk level is shown.

🏖️ Beach

15 / 100

for sea and sun · Bad

🏊 Swimming

64 / 100

water 20° · Average

🏃 Running

90 / 100

comfort for running · Excellent

🧴 UV

moderate · low

☂️ Rain

unlikely · low

✨ Stars

88 / 100

evening visibility · Excellent

🧺 Laundry drying

37 / 100

will dry outside · So-so

🚗 Car wash

95 / 100

no rain expected · Excellent

🌫️ Air quality

Good air

European AQI

PM2.5: 4PM10: 9O₃: 70NO₂: 2

The air is clean — you can walk and exercise outside.

🌅 Sun, moon and sea

Sunrise

06:40

Sunset

19:27

Golden hour

18:45

Daylight

13 h (-4 min vs yesterday)

Sea temperature

+20°

🌊 slight, waves 0.5 m.

Saint Helier climate by month

Long-term averages. Hover over a bar for details. The forecast for a specific month is a combination of the climate normal and the model forecast for the coming weeks.

+9°

+7°

Jan

+9°

+6°

Feb

+10°

+7°

Mar

+11°

+9°

Apr

+14°

+11°

May

+16°

+13°

Jun

+18°

+15°

Jul

+19°

+16°

Aug

+18°

+15°

Sep

+15°

+13°

Oct

+12°

+10°

Nov

+10°

+8°

Dec

swipe sideways →

Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit

Month	Day	Night	Sea	Precipitation	What to pack and what makes the month notable (events, nuances)
January	+9°	+7°	+9°	108 mm	Winter weather: about +9° daytime, you need a warm coat and hat. Frequent rain (108 mm over the month) — keep indoor backup plans. 🧥 a warm jacket. The water is cold (+9°) — swimming is for the brave.
February	+9°	+6°	+9°	80 mm	A cold month: +9° by day, long walks get uncomfortable. One of the wettest months (80 mm): downpours can derail plans. 🧥 a warm jacket. The water is cold (+9°) — swimming is for the brave. This is the coldest month of the year.
March	+10°	+7°	+10°	69 mm	Cold: +10° by day, down to +7° at night — dress warmly. It's a rainy month (69 mm) — an umbrella is a must. 🧥 a warm jacket. The water is cold (+10°) — swimming is for the brave.
April	+11°	+9°	+12°	57 mm	A fresh month — +11° daytime, take a jacket for walks. 🧥 a warm jacket. The water is cold (+12°) — swimming is for the brave.
May	+14°	+11°	+15°	54 mm	Cool weather: +14° by day, noticeably colder in the evening. 🧥 a warm jacket. The water is cold (+15°) — swimming is for the brave.
June	+16°	+13°	+17°	53 mm	Cool: around +16° by day, you'll need a warm layer. 🙂 a sweater for the evening. The water is cold (+17°) — swimming is for the brave. The longest daylight hours of the year — more time for everything.
July	+18°	+15°	+19°	49 mm	Ideal weather: +18° daytime — neither hot nor cold. 🙂 a sweater for the evening. Sea at +19° — swimmable, refreshing. Weather-wise, one of the three best months to visit.
August	+19°	+16°	+19°	65 mm	The most pleasant season: +19° by day, comfortable all day long. One of the wettest months (65 mm): downpours can derail plans. 🙂 a sweater for the evening. Sea at +19° — swimmable, refreshing. This is the hottest month of the year in Saint Helier.
September	+18°	+15°	+19°	74 mm	Cool: around +18° by day, you'll need a warm layer. It's a rainy month (74 mm) — an umbrella is a must. 🙂 a sweater for the evening. Sea at +19° — swimmable, refreshing.
October	+15°	+13°	+16°	119 mm	A fresh month — +15° daytime, take a jacket for walks. Frequent rain (119 mm over the month) — keep indoor backup plans. 🧥 a warm jacket. The water is cold (+16°) — swimming is for the brave.
November	+12°	+10°	+14°	131 mm	Cool weather: +12° by day, noticeably colder in the evening. One of the wettest months (131 mm): downpours can derail plans. 🧥 a warm jacket. The water is cold (+14°) — swimming is for the brave.
December	+10°	+8°	+11°	134 mm	Cool: around +10° by day, you'll need a warm layer. It's a rainy month (134 mm) — an umbrella is a must. 🧥 a warm jacket. The water is cold (+11°) — swimming is for the brave. Statistically the wettest month of the year.

When to visit Saint Helier

✅ Recommended time to visit

🌟 Best time: June, July, August

Daytime air+16…+19°

Sea temperature+17…+19°

Precipitationoften

Why: comfortable +16…+19° by day, little rain.

⚠️ Doable, with caveats

🌤️ Shoulder season: January, March, April, May, September, October

Daytime air+9…+18°

Sea temperature+9…+19°

Precipitationoften

Why: noticeable rain risk (54–119 mm/month) — pack an umbrella and backup plans.

🔴 Not the best time

🌤️ Shoulder season: February, November, December

Daytime air+9…+12°

Sea temperature+9…+14°

Precipitationoften

Why: the rainy season (80–134 mm/month) — downpours almost daily.

Bottom line: the best time to visit Saint Helier is June – August, and the most comfortable months are June, July, August. The toughest months to visit are February, November, December: frequent rain.