Weather in Sendai — today
Now in Sendai
🌤️
+23°
Mostly clear
Feels like +25° · humidity 78%
Today 12.9: +24° / +17°
🕐 16:25
Wind
6 km/h
UV index
2
Air (AQI)
54 · Moderate
Precipitation
0%
Humidity
78%
Pressure
1023 hPa
Sunrise / sunset
05:15 / 17:50
Sea temperature
🌊 +25°
👕 What to wear today
Warm — a T-shirt and light trousers or shorts.
Feels warmer by 2°
Weather for an activity:
Detailed weather information for Sendai
Today, 12 September, Saturday, in Sendai (Japan): mostly clear, warm. During the day the air will warm up to +24°, at night around +17°. Wind up to 7 km/h. No precipitation expected, you won't need an umbrella. Light summer clothing will do — a T-shirt and shorts or light trousers. The sea has warmed up to +25° — great for swimming. The sun will rise at 05:15 and set at 17:50 — daylight lasts 13 hours.Hourly weather in Sendai
💧 The bars at the bottom show the hourly precipitation probability. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).
Weather in Sendai 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
🌤️
+17° +24°
Morning
🌤️
+20°
Day
🌤️
+24°
Evening
🌇
+22°
Night
🌙
+17°
▶
Tomorrow 13.9
🌦️
💧 83%
+20° +22°
Morning
🌦️
+20°
Day
🌦️
+22°
Evening
🌇
+22°
Night
🌙
+20°
▶
Mon 14.9
🌦️
💧 92%
+20° +31°
Morning
🌦️
+24°
Day
🌦️
+31°
Evening
🌇
+28°
Night
🌙
+20°
▶
Tue 15.9
🌦️
💧 100%
+20° +22°
Morning
🌦️
+21°
Day
🌦️
+22°
Evening
🌇
+22°
Night
🌙
+20°
▶
Wed 16.9
🌦️
💧 78%
+19° +24°
Morning
🌦️
+21°
Day
🌦️
+24°
Evening
🌇
+23°
Night
🌙
+19°
▶
Thu 17.9
🌦️
💧 43%
+16° +24°
Morning
🌦️
+19°
Day
🌦️
+24°
Evening
🌇
+22°
Night
🌙
+16°
▶
Fri 18.9
🌦️
💧 46%
+16° +22°
Morning
🌦️
+18°
Day
🌦️
+22°
Evening
🌇
+21°
Night
🌙
+16°
▶
Sat 19.9
🌦️
💧 74%
+19° +25°
Morning
🌦️
+21°
Day
🌦️
+25°
Evening
🌇
+24°
Night
🌙
+19°
▶
Sun 20.9
🌦️
💧 61%
+20° +27°
Morning
🌦️
+23°
Day
🌦️
+27°
Evening
🌇
+25°
Night
🌙
+20°
▶
Mon 21.9
🌦️
💧 72%
+20° +24°
Morning
🌦️
+21°
Day
🌦️
+24°
Evening
🌇
+23°
Night
🌙
+20°
▶
Tue 22.9
🌦️
💧 68%
+21° +30°
Morning
🌦️
+24°
Day
🌦️
+30°
Evening
🌇
+28°
Night
🌙
+21°
▶
Wed 23.9
🌦️
💧 57%
+23° +28°
Morning
🌦️
+25°
Day
🌦️
+28°
Evening
🌇
+27°
Night
🌙
+23°
▶
Thu 24.9
🌤️
💧 49%
+14° +25°
Morning
🌤️
+18°
Day
🌤️
+25°
Evening
🌇
+22°
Night
🌙
+14°
▶
Fri 25.9
🌦️
💧 26%
+13° +21°
Morning
🌦️
+16°
Day
🌦️
+21°
Evening
🌇
+19°
Night
🌙
+13°
🗺️ 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
75 / 100
for sea and sun · Good
🏊 Swimming
94 / 100
water 25° · Excellent
🏃 Running
78 / 100
comfort for running · Good
🧴 UV
18%
moderate · low
☂️ Rain
0%
unlikely · low
✨ Stars
88 / 100
evening visibility · Excellent
🧺 Laundry drying
63 / 100
will dry outside · Average
🚗 Car wash
95 / 100
no rain expected · Excellent
🌫️ Air quality
54
Moderate air
European AQI
PM2.5: 10PM10: 12O₃: 114NO₂: 4
Moderate. Those sensitive to dust should be more careful during long outdoor exercise.
🌅 Sun, moon and sea
Sunrise
05:15
Sunset
17:50
Golden hour
17:15
Daylight
13 h (-3 min vs yesterday)
Sea temperature
+25°
Sendai 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.
+4°
-3°
Jan
+5°
-3°
Feb
+9°
+0°
Mar
+14°
+5°
Apr
+18°
+10°
May
+21°
+15°
Jun
+25°
+19°
Jul
+26°
+21°
Aug
+23°
+18°
Sep
+18°
+11°
Oct
+13°
+5°
Nov
+7°
+0°
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 | +4° | -3° | +10° | 64 mm | Cold: +4° by day, down to -3° at night — dress warmly. It's a rainy month (64 mm) — an umbrella is a must. ❄️ a warm jacket, a hat, non-slip shoes. The water is cold (+10°) — swimming is for the brave. This is the coldest month of the year. |
| February | +5° | -3° | +10° | 51 mm | Winter weather: about +5° daytime, you need a warm coat and hat. ❄️ a warm jacket, a hat, non-slip shoes. The water is cold (+10°) — swimming is for the brave. |
| March | +9° | +0° | +9° | 87 mm | A cold month: +9° by day, long walks get uncomfortable. One of the wettest months (87 mm): downpours can derail plans. 🧥 a warm jacket. The water is cold (+9°) — swimming is for the brave. |
| April | +14° | +5° | +12° | 94 mm | Cool: around +14° by day, you'll need a warm layer. It's a rainy month (94 mm) — an umbrella is a must. 🧥 a warm jacket. The water is cold (+12°) — swimming is for the brave. |
| May | +18° | +10° | +15° | 103 mm | Ideal weather: +18° daytime — neither hot nor cold. Frequent rain (103 mm over the month) — keep indoor backup plans. 🙂 a sweater for the evening. The water is cold (+15°) — swimming is for the brave. Weather-wise, one of the three best months to visit. |
| June | +21° | +15° | +19° | 130 mm | The most pleasant season: +21° by day, comfortable all day long. One of the wettest months (130 mm): downpours can derail plans. 🙂 a sweater for the evening. Sea at +19° — swimmable, refreshing. The longest daylight hours of the year — more time for everything. |
| July | +25° | +19° | +24° | 187 mm | One of the best times to visit: +25° by day, fresh nights. It's a rainy month (187 mm) — an umbrella is a must. 😊 light summer clothing. Water at +24° — great for swimming. Statistically the wettest month of the year. |
| August | +26° | +21° | +27° | 163 mm | Gentle warmth — about +26° daytime, great walking weather. Frequent rain (163 mm over the month) — keep indoor backup plans. 😊 light summer clothing. Water at +27° — great for swimming. This is the hottest month of the year in Sendai. |
| September | +23° | +18° | +26° | 170 mm | The most pleasant season: +23° by day, comfortable all day long. One of the wettest months (170 mm): downpours can derail plans. 🙂 a sweater for the evening. Water at +26° — great for swimming. |
| October | +18° | +11° | +22° | 145 mm | One of the best times to visit: +18° by day, fresh nights. It's a rainy month (145 mm) — an umbrella is a must. 🙂 a sweater for the evening. Water at +22° — great for swimming. |
| November | +13° | +5° | +17° | 65 mm | A fresh month — +13° daytime, take a jacket for walks. Frequent rain (65 mm over the month) — keep indoor backup plans. 🧥 a warm jacket. The water is cold (+17°) — swimming is for the brave. |
| December | +7° | +0° | +13° | 60 mm | A cold month: +7° by day, long walks get uncomfortable. 🧣 a warmer jacket. The water is cold (+13°) — swimming is for the brave. The shortest daylight of the year — it gets dark early. |
When to visit Sendai
✅ Recommended time to visit
🌟 Best time: May, June, August
Daytime air+18…+26°
Sea temperature+15…+27°
Precipitationoften
Why: comfortable +18…+26° by day, little rain.
⚠️ Doable, with caveats
🌤️ Shoulder season: January, February, July, September, October, November
Daytime air+4…+25°
Sea temperature+10…+26°
Precipitationoften
Why: noticeable rain risk (51–187 mm/month) — pack an umbrella and backup plans.
🔴 Not the best time
❄️ Cold season: March, April, December
Daytime air+7…+14°
Sea temperature+9…+13°
Precipitationoften
Why: cold and dark (+7…+14° by day, 10 h of daylight) — only if frost and short days don’t put you off.
Bottom line: the best time to visit Sendai is May, June, August, and the most comfortable months are May, June, August. The toughest months to visit are March, April, December: frequent rain.
🌡️ Today vs the climate normal
Today's high
+24°
Normal for September
+23°
Deviation
1° warmer than normal
A year ago on this day
+25°
Record for this date
+30° (2024)
The normal, “a year ago” and the record come from the weather archive since 1940 (Open-Meteo / ERA5).
Weather archive for Sendai
📅 See what the weather was like on any day since 1940. For example: “what was the weather on March 2, 2021”.
Show the archive for the selected day →
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Weather in cities near Sendai
Frequently asked questions about the weather in Sendai
What is the weather in Sendai right now?＋
Mostly clear, +23°, feels like +25°.
Will it rain in Sendai today?＋
No: 0% chance, 0 mm.
When is the best time to visit Sendai?＋
Best time to visit — May, June, August.
Can you swim in Sendai in summer?＋
In winter the water is around +11° — swimming is for the brave. In summer the sea warms up to +23°.
What time are sunrise and sunset in Sendai?＋
Sunrise 05:15, sunset 17:50.
Does it snow in Sendai in winter?＋
Yes, snow is possible in January, February, March.
What is the climate in Sendai by month?＋
Summers up to +26° in August, winters around -3° in January; the wettest month is July.
Is it cold in Sendai in winter?＋
❄️ Cold, around zero and below. A warm jacket and a hat are a must; ice is common — you'll need non-slip shoes.