AI-generatedYokosuka at a glance
- Best time
- Apr – Nov
- Warmest month
- Aug · 29°
- Warmest sea
- Aug · 26.2°
- Sunshine a year
- 1,940 h
- Rain a year
- 1,458 mm
- Climate
- Temperate
- Time zone
- UTC+9
- Elevation
- 9 m
Climate in Yokosuka
Yokosuka has a temperate climate with warm summers and cool winters. August is the warmest month with average highs of 29 °C, while January is the coolest at 9 °C. With around 1,940 hours of sunshine a year, Yokosuka is moderately sunny; January is the sunniest month with 6.2 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: April – November
October is the peak of the typhoon season
Keep in mindFrequent rainStorm season
A typical day in October
- Morning, 08:00: about 19°
- Midday, 13:00: about 21°
- Afternoon, 16:00: about 21°
- Evening, 20:00: about 19°
- Night, 23:00: about 18°
05:4617:08
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:31–06:20 · evening 16:33–17:23
- Blue hour
- Morning 05:21–05:31 · evening 17:23–17:33
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 Yokosuka in October?
In October, Yokosuka is warm: daytime highs average 21 °C, and nights cool down to about 17 °C. The sea averages 23.3 °C – pleasant for swimming. Expect around 4 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 195 mm in total. All in all, October is a good month for a holiday in Yokosuka.
More details for October
- Daylight
- 11 h 21 min05:46 – 17:08
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 6 daysdew point 18 °C or moreAll months
- Wind
- 24 km/haverage daily peakAll months
- Cloud cover
- 61 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %20 %
- Few rainy daysweight 30 %36 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Swimwear
- Sunscreen
- Rain jacket or umbrella
Sea temperature in Yokosuka
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 21.9 – 24.3 °C
Swimming season: Jun – Nov
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Yokosuka ranges from 15.4 °C in February to 26.2 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to November.
From October to March 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 25.1 and 26.7 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 16.4° | 15.5° | 17.2° | cold |
| FebruaryFeb | 15.4° | 14.5° | 16.3° | cold |
| MarchMar | 15.6° | 14.5° | 16.4° | cold |
| AprilApr | 16.7° | 15.9° | 17.8° | cold |
| MayMay | 19.0° | 18.4° | 19.6° | fresh |
| JuneJun | 21.5° | 20.9° | 22.0° | refreshing |
| JulyJul | 24.0° | 23.1° | 24.9° | pleasant |
| AugustAug | 26.2° | 25.1° | 26.7° | warm |
| SeptemberSep | 25.6° | 24.5° | 26.3° | pleasant |
| OctoberOct | 23.3° | 21.9° | 24.3° | pleasant |
| NovemberNov | 21.0° | 20.3° | 21.9° | refreshing |
| DecemberDec | 18.4° | 17.5° | 19.5° | fresh |
Sunshine hours in Yokosuka
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 4.2 of 11.4 hours of daylight in Yokosuka, 37 % 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 Yokosuka
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 5 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 11).
Minutes until sunburn in October
- Very fair skin
- about 25 min
- Fair skin
- about 30 min
- Light brown skin
- about 45 min
- Olive skin
- about 60 min
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 Yokosuka: 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, Yokosuka has about 13 rainy days with 195 mm of rain in total.
Wind and clouds in Yokosuka
How breezy and how cloudy Yokosuka 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 Yokosuka typically peaks at 24 km/h during the day: Beaufort 4, moderate 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 61 % of the sky over Yokosuka: variable cloud, with about 4.2 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.
Heat and humidity in Yokosuka
How often the day gets hot in Yokosuka (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Yokosuka has about 0 hot days, with an average daytime high of 21 °C: some hot or muggy days. Single hot or muggy days are possible; a hat and water bottle are enough.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Yokosuka
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°
- Warm 20–24°
- Hot 24° and more
- muggy month (10+ muggy days)
PleasantOctober: nights around 17°. Ideal for sleeping, often with the window open. Muggy on about 6 days (dew point 18 °C or more).
The coolest nights are in January (4°), the warmest in August (25°). Tropical nights of 20 °C and more are the rule from July to September; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) from May to June and in October. Nights fall below 8 °C on average from December to March, so the room should be heated. It is muggy (dew point 18 °C or more) on about 112 days a year, mostly from June to September.
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 | 42 | 9° | 4° | 16.4° | 6.2 h | 7 | 67 |
| FebruaryFeb | 41 | 10° | 4° | 15.4° | 6.0 h | 8 | 69 |
| MarchMar | 48 | 13° | 7° | 15.6° | 5.6 h | 12 | 123 |
| AprilApr | 68 | 17° | 11° | 16.7° | 6.0 h | 12 | 123 |
| MayMay | 74 | 21° | 16° | 19.0° | 5.9 h | 11 | 134 |
| JuneJun | 66 | 24° | 19° | 21.5° | 4.2 h | 13 | 167 |
| JulyJul | 67 | 27° | 23° | 24.0° | 4.9 h | 12 | 144 |
| AugustAug | 63 | 29° | 25° | 26.2° | 5.8 h | 11 | 105 |
| SeptemberSep | 64 | 26° | 22° | 25.6° | 4.3 h | 13 | 165 |
| OctoberOct | 65 | 21° | 17° | 23.3° | 4.2 h | 13 | 195 |
| NovemberNov | 66 | 17° | 12° | 21.0° | 4.9 h | 10 | 99 |
| DecemberDec | 51 | 12° | 7° | 18.4° | 5.6 h | 7 | 66 |
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
35.28° N, 139.67° E · 9 m · Asia/Tokyo
Best time to visit Yokosuka
The best time to visit Yokosuka is from April to November. For a beach holiday with the sea above 21 °C, go in August. For sightseeing, day trips and hiking, conditions are most comfortable from April to May and in November. Rain is most frequent in April and from June to July and from September to October; the wettest month is October with 195 mm.
Yokosuka through the seasons
How the weather changes over the seasons, with averages for each.
Yokosuka in spring
Mar – May
Good
- 13–21 °C by day
- Sea 17 °C
- 6 h of sun a day
- 35 rainy days in all
Yokosuka in summer
Jun – Aug
Good
- 24–29 °C by day
- Sea 24 °C
- 5 h of sun a day
- 36 rainy days in all
Yokosuka in autumn
Sep – Nov
Good
- 17–26 °C by day
- Sea 23 °C
- 5 h of sun a day
- 37 rainy days in all
Yokosuka in winter
Dec – Feb
Fair
- 9–12 °C by day
- Sea 17 °C
- 6 h of sun a day
- 22 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Yokosuka for you.
Your best months: May – June, October
Based on the climate averages; tap a month to see its details.
Compare two months in Yokosuka
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
May has the better holiday weather in Yokosuka: score 74 against 65. Daytime highs are about the same. The sea is 4 °C cooler in May. May has 2 fewer rainy days. The sun shines 2 hours longer a day in May.
| Month | October | May |
|---|---|---|
| Weather score | 65 | 74better |
| Day high | 21° | 21° |
| Night low | 17° | 16° |
| Sea | 23.3° | 19.0° |
| Sunshine | 4.2 h | 5.9 hbetter |
| Rainy days | 13 | 11better |
| Rainfall | 195 mm | 134 mmbetter |
| Muggy days | 6 | 3better |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Aug
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – May, Nov
15–28 °C and not too much rain
Rainy months
Apr, Jun – Jul, Sep – Oct
12 or more rainy days
Yokosuka month by month
The typical weather for every month at a glance.
42January9° · Sea 16° · 6 h
In January, Yokosuka is cold: daytime highs average 9 °C, and nights cool down to about 4 °C. The sea averages 16.4 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain falls on about 7 days, adding up to 67 mm. All in all, January is a so-so month for a holiday in Yokosuka.
Yokosuka in January41February10° · Sea 15° · 6 h
In February, Yokosuka is cool: daytime highs average 10 °C, and nights cool down to about 4 °C. The sea averages 15.4 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain falls on about 8 days, adding up to 69 mm. All in all, February is a so-so month for a holiday in Yokosuka.
Yokosuka in February48March13° · Sea 16° · 6 h
In March, Yokosuka is cool: daytime highs average 13 °C, and nights cool down to about 7 °C. The sea averages 15.6 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 123 mm in total. It is often windy, with gusts of around 29 km/h. All in all, March is a so-so month for a holiday in Yokosuka.
Yokosuka in March68April17° · Sea 17° · 6 h
In April, Yokosuka is mild: daytime highs average 17 °C, and nights cool down to about 11 °C. The sea averages 16.7 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 123 mm in total. It is often windy, with gusts of around 29 km/h. All in all, April is a good month for a holiday in Yokosuka.
Yokosuka in April74May21° · Sea 19° · 6 h
In May, Yokosuka is mild: daytime highs average 21 °C, and nights cool down to about 16 °C. The sea averages 19.0 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 134 mm in total. All in all, May is a good month for a holiday in Yokosuka.
Yokosuka in May66June24° · Sea 22° · 4 h
In June, Yokosuka is warm: daytime highs average 24 °C, and nights cool down to about 19 °C. The sea averages 21.5 °C – refreshing for a swim. Expect around 4 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 167 mm in total. The air is often humid and muggy. All in all, June is a good month for a holiday in Yokosuka.
Yokosuka in June67July27° · Sea 24° · 5 h
In July, Yokosuka is hot: daytime highs average 27 °C, and even at night it stays warm at around 23 °C. The sea averages 24.0 °C – pleasant for swimming. Expect around 5 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 144 mm in total. The air is often humid and muggy. All in all, July is a good month for a holiday in Yokosuka.
Yokosuka in July63August29° · Sea 26° · 6 h
In August, Yokosuka is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °C. The sea averages 26.2 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 105 mm in total. On about 7 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a good month for a holiday in Yokosuka.
Yokosuka in August64September26° · Sea 26° · 4 h
In September, Yokosuka is warm: daytime highs average 26 °C, and even at night it stays warm at around 22 °C. The sea averages 25.6 °C – pleasant for swimming. Expect around 4 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 165 mm in total. The air is often humid and muggy. All in all, September is a good month for a holiday in Yokosuka.
Yokosuka in September65October21° · Sea 23° · 4 h
In October, Yokosuka is warm: daytime highs average 21 °C, and nights cool down to about 17 °C. The sea averages 23.3 °C – pleasant for swimming. Expect around 4 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 195 mm in total. All in all, October is a good month for a holiday in Yokosuka.
Yokosuka in October66November17° · Sea 21° · 5 h
In November, Yokosuka is mild: daytime highs average 17 °C, and nights cool down to about 12 °C. The sea averages 21.0 °C – refreshing for a swim. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 99 mm in total. All in all, November is a good month for a holiday in Yokosuka.
Yokosuka in November51December12° · Sea 18° · 6 h
In December, Yokosuka is cool: daytime highs average 12 °C, and nights cool down to about 7 °C. The sea averages 18.4 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain falls on about 7 days, adding up to 66 mm. All in all, December is a so-so month for a holiday in Yokosuka.
Yokosuka in DecemberYokosuka compared
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Yokosuka vs. Kamakura
In October the holiday weather in Yokosuka and Kamakura is about equally good (score 65 vs. 65). During the day Kamakura is 1 °C cooler than Yokosuka. The sea is about equally warm.
| in October | Yokosuka | Kamakura |
|---|---|---|
| Holiday score | 65 | 65 |
| Daytime high | 21° | 20° |
| Sea | 23° | 23° |
| Sunshine | 4 h | 4 h |
| Rainy days | 13 | 13 |
| Best time | Apr – Nov | Apr – Nov |
Through the year
Japan in October: the best places
In October, Yokosuka ranks 16 among the 31 nearest destinations in this country.
- Hiroshima22°23°81
- 2Fukuoka22°23°81
- 3Nagasaki23°24°81
- 4Kumamoto23°23°80
- 5Kitakyūshū22°23°79
- 6Okayama22°24°78
- 7Kagoshima24°26°77
- 8Nagoya22°75
- 16YokosukaThis page21°23°65
Planning a trip to Yokosuka
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Yokosuka 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.
Yokosuka has its best school-holiday weather during May half-term (score 72) and its weakest during the Christmas holidays (score 47).
- 62
Easter holidays
Mar – Apr
Good
- 16 °C by day
- Sea 16 °C
- 5.9 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
- 72
May half-term
May – Jun
GoodBest holidays
- 21 °C by day
- Sea 20 °C
- 5.6 h of sun a day
- 12 rainy days a month
Good for: Sightseeing & walks
- 64
Summer holidays
Jul – Aug
Good
- 28 °C by day
- Sea 25 °C
- 5.5 h of sun a day
- 11 rainy days a month
Keep in mind: Frequent rain, Storm season
- 65
October half-term
Oct
Good
- 21 °C by day
- Sea 23 °C
- 4.2 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain, Storm season
- 47
Christmas holidays
Dec – Jan
Fair
- 11 °C by day
- Sea 17 °C
- 5.9 h of sun a day
- 7 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 12 h 5 min
- Distance
- 9,610 km
- Time zone
- UTC+9
- Jet lag
- About 8 days (8 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Storm season
Yokosuka lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April
- May
- June: Season
- July: Season
- August: Peak
- September: Peak
- October: Peak
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM); not a forecast.
Frequently asked questions about Yokosuka
When is the best time to visit Yokosuka?
The best time to visit Yokosuka is from April to November. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Yokosuka?
The sea temperature in Yokosuka ranges from 15.4 °C in February to 26.2 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to November.
Can you swim in Yokosuka in October?
Yes. In October the sea averages 23.3 °C – pleasant for swimming.
What is the warmest month in Yokosuka?
August is the warmest month, with average highs of 29 °C and nights around 25 °C. January is the coolest month at 9 °C.
When does it rain most in Yokosuka?
Rain is most frequent in April and from June to July and from September to October; the wettest month is October with 195 mm. The driest month is December with 66 mm.
How many hours of sunshine does Yokosuka get?
Yokosuka gets around 1,940 hours of sunshine a year. The sunniest month is January with 6.2 hours a day; in June there are 4.2 hours a day.
What time zone is Yokosuka in?
Yokosuka uses the time zone Asia/Tokyo, at UTC+9 all year.
How long is the flight from London to Yokosuka?
A nonstop flight from London to Yokosuka takes about 12 h 5 min, for a straight-line distance of about 9,610 km. Most routes need a change of planes, which adds time.
When is typhoon season in Yokosuka?
Yokosuka lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for Yokosuka?
Yokosuka has its best school-holiday weather during May half-term (score 72) and its weakest during the Christmas holidays (score 47). Holiday ratings (0–100): Easter holidays 62, May half-term 72, Summer holidays 64, October half-term 65, Christmas holidays 47.
Near Yokosuka
Other destinations close by.
Places with a climate like Yokosuka
Destinations whose weather through the year is closest to Yokosuka's – good alternatives.