AI-generatedGreenwich at a glance
- Best time
- Jul – Sep
- Warmest month
- Jul · 30°
- Warmest sea
- Aug · 23.5°
- Sunshine a year
- 2,190 h
- Rain a year
- 1,124 mm
- Climate
- Continental
- Time zone
- UTC−5 / UTC−4
- Elevation
- 28 m
Climate in Greenwich
Greenwich has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 30 °C, while January is the coolest at 4 °C. With around 2,190 hours of sunshine a year, Greenwich is moderately sunny; July is the sunniest month with 7.9 hours a day.
Holiday weather through the year
Best time to visit Greenwich
The best time to visit Greenwich is from July to September. In August and September, though, the hurricane season is at its peak: check the forecast before you go. For a beach holiday – sea from 21 °C, warm and mostly dry – go from July to September. For sightseeing, day trips and hiking, conditions are most comfortable from April to June and from September to October. The wettest month is December with 108 mm of precipitation.
Greenwich through the seasons
How the weather changes over the seasons, with averages for each.
Greenwich in spring
Mar – May
Poor
- 10–22 °C by day
- Sea 8 °C
- 6.5 h of sun a day
- 32 rainy days in all
Greenwich in summer
Jun – Aug
Good
- 27–30 °C by day
- Sea 22 °C
- 7.5 h of sun a day
- 33 rainy days in all
Greenwich in autumn
Sep – Nov
Fair
- 12–25 °C by day
- Sea 18 °C
- 5.4 h of sun a day
- 26 rainy days in all
Greenwich in winter
Dec – Feb
Poor
- 4–7 °C by day
- Sea 5 °C
- 4.6 h of sun a day
- 28 rainy days in all
Which month for what?
Beach & swimming
Jul – Sep
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – Jun, Sep – Oct
15–28 °C and not too much rain
Snow
Dec – Mar
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Greenwich for you.
Your best months: July – August
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Poor
Best time to visit: July – September
October is the peak of the hurricane season Hurricane season
Where to go in OctoberSea temperature in October
Good forSightseeing & walks
Keep in mindStorm season
A typical day in October
- Morning, 08:00: about 12°
- Midday, 13:00: about 18°
- Afternoon, 16:00: about 18°
- Evening, 20:00: about 14°
- Night, 23:00: about 13°
07:0418:16
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 06:47–07:42 · evening 17:38–18:33
- Blue hour
- Morning 06:37–06:47 · evening 18:33–18:43
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.
October in Greenwich compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 21° at the start of the month to 15° at the end. The sea cools from 20° to 16°. The days get 1.3 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 21° | 15° |
| Night-time low | 13° | 7° |
| Sea | 20° | 16° |
| Daylight | 11.8 h | 10.5 h |
What is the weather like in Greenwich in October?
In October, Greenwich is mild: daytime highs average 18 °C, and nights cool down to about 10 °C. The sea averages 18.3 °C – bracing, so a wetsuit helps for longer swims. Expect around 5.4 hours of sunshine a day. Rain falls on about 9 days, adding up to 106 mm. All in all, October is not an ideal month for a holiday in Greenwich.
More details for October
- Daylight
- 11 h 11 min07:04 – 18:16
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 52 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4offset from UTC
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %19 %
- Sunshineweight 20 %40 %
- Few rainy daysweight 20 %66 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Greenwich
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
August has the better holiday weather in Greenwich: score 83 against 26. In August, days are 11 °C warmer than in October. The sea is 5 °C warmer in August. August has 2 more rainy days. The sun shines 2 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Holiday weather score | 26 | 83better |
| Daytime high | 18° | 29° |
| Night-time low | 10° | 20° |
| Sea | 18.3° | 23.5° |
| Sunshine | 5.4 h | 7.2 hbetter |
| Rainy days | 9better | 11 |
| Rainfall | 106 mm | 94 mmbetter |
| Muggy days | 1better | 16 |
Based on the climate averages 1996–2025.
Greenwich month by month
The typical weather for every month at a glance.
18January4° · Sea 4° · 4.6 h
In January, Greenwich is cold: daytime highs average 4 °C, and nights often drop below freezing (−3 °C). The sea averages 3.9 °C – swimming is only for the hardy. Expect around 4.6 hours of sunshine a day. Precipitation falls on about 9 days, totalling 86 mm; on about 4 of them it snows. All in all, January is not an ideal month for a holiday in Greenwich.
Greenwich in January20February5° · Sea 2° · 5.2 h
In February, Greenwich is cold: daytime highs average 5 °C, and nights often drop below freezing (−3 °C). The sea averages 2.1 °C – swimming is only for the hardy. Expect around 5.2 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 79 mm in total. Snow falls on about 3 days. All in all, February is not an ideal month for a holiday in Greenwich.
Greenwich in February21March10° · Sea 3° · 6.0 h
In March, Greenwich is cold: daytime highs average 10 °C, and nights cool down to about 1 °C. The sea averages 3.3 °C – swimming is only for the hardy. Expect around 6.0 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 104 mm in total. Snow falls on about 3 days. All in all, March is not an ideal month for a holiday in Greenwich.
Greenwich in March23April16° · Sea 7° · 6.6 h
In April, Greenwich is mild: daytime highs average 16 °C, and nights cool down to about 7 °C. The sea averages 7.2 °C – swimming is only for the hardy. The sun shines for around 6.6 hours a day. Rain is frequent, with about 11 rainy days and 95 mm in total. All in all, April is not an ideal month for a holiday in Greenwich.
Greenwich in April40May22° · Sea 13° · 6.8 h
In May, Greenwich is warm: daytime highs average 22 °C, and nights cool down to about 12 °C. The sea averages 12.9 °C – swimming is only for the hardy. The sun shines for around 6.8 hours a day. Rain is frequent, with about 11 rainy days and 89 mm in total. All in all, May is a so-so month for a holiday in Greenwich.
Greenwich in May66June27° · Sea 19° · 7.5 h
In June, Greenwich is warm: daytime highs average 27 °C, and nights cool down to about 18 °C. The sea averages 18.6 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 7.5 hours a day. Rain is frequent, with about 11 rainy days and 95 mm in total. On about 7 days the thermometer climbs to 30 °C or more. All in all, June is a good month for a holiday in Greenwich.
Greenwich in June81July30° · Sea 23° · 7.9 h
In July, Greenwich is hot: daytime highs average 30 °C, and even at night it stays warm at around 21 °C. The sea averages 22.5 °C – refreshing for a swim. The sun shines for around 7.9 hours a day. Rain is frequent, with about 11 rainy days and 96 mm in total. On about 14 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is an excellent month for a holiday in Greenwich.
Greenwich in July83August29° · Sea 24° · 7.2 h
In August, Greenwich is hot: daytime highs average 29 °C, and even at night it stays warm at around 20 °C. The sea averages 23.5 °C – pleasant for swimming. The sun shines for around 7.2 hours a day. Rain is frequent, with about 11 rainy days and 94 mm in total. On about 10 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is an excellent month for a holiday in Greenwich.
Greenwich in August75September25° · Sea 22° · 6.0 h
In September, Greenwich is warm: daytime highs average 25 °C, and nights cool down to about 16 °C. The sea averages 22.2 °C – refreshing for a swim. Expect around 6.0 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 97 mm in total. All in all, September is a good month for a holiday in Greenwich.
Greenwich in September26October18° · Sea 18° · 5.4 h
In October, Greenwich is mild: daytime highs average 18 °C, and nights cool down to about 10 °C. The sea averages 18.3 °C – bracing, so a wetsuit helps for longer swims. Expect around 5.4 hours of sunshine a day. Rain falls on about 9 days, adding up to 106 mm. All in all, October is not an ideal month for a holiday in Greenwich.
Greenwich in October20November12° · Sea 13° · 4.8 h
In November, Greenwich is cool: daytime highs average 12 °C, and nights cool down to about 5 °C. The sea averages 12.9 °C – swimming is only for the hardy. Expect around 4.8 hours of sunshine a day. Rain falls on about 8 days, adding up to 76 mm. All in all, November is not an ideal month for a holiday in Greenwich.
Greenwich in November15December7° · Sea 8° · 4.0 h
In December, Greenwich is cold: daytime highs average 7 °C, and nights cool down to about 0 °C. The sea averages 7.8 °C – swimming is only for the hardy. Expect around 4.0 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 108 mm in total. Snow falls on about 2 days. All in all, December is not an ideal month for a holiday in Greenwich.
Greenwich in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Greenwich
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- muggy month (15+ muggy days)
CoolOctober: nights around 10°. A duvet at night and a jumper for the evening. Muggy on about 1 day (dew point 18 °C or more).
The coolest nights are in January (−3°), the warmest in July (21°). Tropical nights of 20 °C and more are the rule from July to August; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in June and in September. Nights fall below 8 °C on average from November to April, so the room should be heated. It is muggy (dew point 18 °C or more) on about 52 days a year, mostly from July to August.
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 | 18 | 4° | −3° | 3.9° | 4.6 h | 9 | 86 |
| FebruaryFeb | 20 | 5° | −3° | 2.1° | 5.2 h | 9 | 79 |
| MarchMar | 21 | 10° | 1° | 3.3° | 6.0 h | 10 | 104 |
| AprilApr | 23 | 16° | 7° | 7.2° | 6.6 h | 11 | 95 |
| MayMay | 40 | 22° | 12° | 12.9° | 6.8 h | 11 | 89 |
| JuneJun | 66 | 27° | 18° | 18.6° | 7.5 h | 11 | 95 |
| JulyJul | 81 | 30° | 21° | 22.5° | 7.9 h | 11 | 96 |
| AugustAug | 83 | 29° | 20° | 23.5° | 7.2 h | 11 | 94 |
| SeptemberSep | 75 | 25° | 16° | 22.2° | 6.0 h | 9 | 97 |
| OctoberOct | 26 | 18° | 10° | 18.3° | 5.4 h | 9 | 106 |
| NovemberNov | 20 | 12° | 5° | 12.9° | 4.8 h | 8 | 76 |
| DecemberDec | 15 | 7° | 0° | 7.8° | 4.0 h | 10 | 108 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), 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
41.03° N, 73.63° W · 28 m · America/New_York
Sea temperature in Greenwich
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 17.1 – 19.0 °C
Swimming season: Jul – Sep
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Greenwich ranges from 2.1 °C in February to 23.5 °C in August. It is warm enough for a comfortable swim (20 °C and more) from July to September.
The sea warms up slowly: it is warmest in August, while the air already peaks in July. From October to December 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 22.5 and 24.8 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 3.9° | 2.1° | 5.7° | cold |
| FebruaryFeb | 2.1° | 0.5° | 4.3° | cold |
| MarchMar | 3.3° | 1.7° | 4.9° | cold |
| AprilApr | 7.2° | 5.3° | 8.9° | cold |
| MayMay | 12.9° | 11.3° | 14.5° | cold |
| JuneJun | 18.6° | 16.7° | 20.5° | fresh |
| JulyJul | 22.5° | 20.8° | 24.5° | refreshing |
| AugustAug | 23.5° | 22.5° | 24.8° | pleasant |
| SeptemberSep | 22.2° | 21.0° | 23.4° | refreshing |
| OctoberOct | 18.3° | 17.1° | 19.0° | fresh |
| NovemberNov | 12.9° | 12.1° | 13.9° | cold |
| DecemberDec | 7.8° | 6.6° | 9.3° | cold |
Sunshine hours in Greenwich
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 5.4 of 11.2 hours of daylight in Greenwich, 48 % of the daylight hours.
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.
Rain in Greenwich: 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, Greenwich has about 9 rainy days with 106 mm of rain in total.
UV index in Greenwich
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 4 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 10).
Minutes until sunburn in October
- Very fair skin
- about 35 min
- Fair skin
- about 45 min
- Light brown skin
- about 60 min
- Olive skin
- about 80 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, 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.
Wind and clouds in Greenwich
How breezy and how cloudy Greenwich 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 Greenwich typically peaks at 18 km/h during the day: Beaufort 3, gentle 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: Dec – Mar.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 52 % of the sky over Greenwich: variable cloud, with about 5.4 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 Greenwich
How often the day gets hot in Greenwich (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, Greenwich has about 0 hot days, with an average daytime high of 18 °C: pleasant. Heat plays no part this month.
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
Snow in Greenwich
Snow is possible in Greenwich, but no month makes it likely: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in Greenwich.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Planning a trip to Greenwich
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Greenwich 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.
Greenwich has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 17).
- 22
Easter holidays
Mar – Apr
Poor
- 14 °C by day
- Sea 6 °C
- 6.4 h of sun a day
- 10 rainy days a month
Keep in mind: Snow
- 45
May half-term
May – Jun
Fair
- 23 °C by day
- Sea 14 °C
- 6.9 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 82
Summer holidays
Jul – Aug
ExcellentBest holidays
- 29 °C by day
- Sea 23 °C
- 7.4 h of sun a day
- 11 rainy days a month
Good for: Beach & swimming
Keep in mind: Storm season
- 26
October half-term
Oct
Poor
- 18 °C by day
- Sea 18 °C
- 5.4 h of sun a day
- 9 rainy days a month
Good for: Sightseeing & walks
Keep in mind: Storm season
- 17
Christmas holidays
Dec – Jan
Poor
- 5 °C by day
- Sea 6 °C
- 4.3 h of sun a day
- 10 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 7 h 10 min
- Distance
- 5,500 km
- Time zone
- UTC−4
- Jet lag
- About 3 days (5 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Storm season
Greenwich lies in an area that Atlantic hurricanes can reach. The hurricane 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, Fiji Meteorological Service); not a forecast.
Compare & alternatives
Greenwich compared
Put Greenwich side by side with another destination.
Greenwich vs Stamford
In October the holiday weather in Greenwich and Stamford is about equally good (score 26 vs 26). During the day it is about as warm in Stamford as in Greenwich. The sea is about equally warm.
| in October | Greenwich | Stamford |
|---|---|---|
| Holiday weather score | 26 | 26 |
| Daytime high | 18° | 18° |
| Sea | 18° | 18° |
| Sunshine | 5 h | 5 h |
| Rainy days | 9 | 9 |
| Best time | Jul – Sep | Jul – Sep |
Through the year
USA in October: the best places
In October, Greenwich ranks 19 among the 31 nearest destinations in this country.
- Washington21°19°81
- 2Alexandria21°19°81
- 3Philadelphia20°18°79
- 4Baltimore21°18°79
- 5New York19°18°78
- 6Providence18°17°77
- 7Harrisburg19°77
- 8Hartford18°76
- 19GreenwichThis page18°18°26
Near Greenwich
Other destinations close by.
Places with a climate like Greenwich
Destinations whose weather through the year is closest to Greenwich's – good alternatives.
Frequently asked questions about Greenwich
When is the best time to visit Greenwich?
The best time to visit Greenwich is from July to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Greenwich?
The sea temperature in Greenwich ranges from 2.1 °C in February to 23.5 °C in August. It is warm enough for a comfortable swim (20 °C and more) from July to September.
Can you swim in Greenwich in October?
Only if you don't mind cold water: in October the sea averages just 18.3 °C. Comfortable swimming is possible from July to September.
What is the warmest month in Greenwich?
July is the warmest month, with average highs of 30 °C and nights around 21 °C. January is the coolest month at 4 °C.
When does it rain most in Greenwich?
The wettest month is December with 108 mm of precipitation. The driest month is November with 76 mm.
How many hours of sunshine does Greenwich get?
Greenwich gets around 2,190 hours of sunshine a year. The sunniest month is July with 7.9 hours a day; in December there are 4.0 hours a day.
What time zone is Greenwich in?
Greenwich is on UTC−5 in January and UTC−4 in July.
How long is the flight from London to Greenwich?
A nonstop flight from London to Greenwich takes about 7 h 10 min, for a straight-line distance of about 5,500 km.
When is hurricane season in Greenwich?
Greenwich lies in an area that Atlantic hurricanes can reach. The hurricane 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 Greenwich?
Greenwich has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 17). Holiday ratings (0–100): Easter holidays 22, May half-term 45, summer holidays 82, October half-term 26, Christmas holidays 17.