Waterlink Way : Lower Sydenham to Greenwich Short Walk

London hourly weather (Open Meteo)

Sunset: 16:10. Dusk: 16:47. Dark: 17:28. Moon 100% (dusk to dawn)

Updated: Sat, 16-Nov at 02:36

	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21
Today	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	3%	5%	10%	40%	70%	50%
Sun, 17 Nov	3%	5%	5%	0%	0%	3%	0%	3%	0%	5%	15%	18%	20%	20%	17%	15%
Mon, 18 Nov	23%	24%	25%	25%	26%	27%	30%	34%	40%	45%	46%	50%	55%	60%	66%	72%
Tue, 19 Nov	80%	76%	70%	63%	57%	50%	45%	41%	37%	34%	31%	28%	25%	21%	18%	14%
Wed, 20 Nov	5%	5%	5%	5%	5%	5%	5%	5%	4%	4%	4%	3%	3%	3%	3%	3%
Thu, 21 Nov	3%	3%	3%	3%	3%	3%	3%	3%	3%	3%	4%	4%	4%	4%	4%	5%
Fri, 22 Nov	5%	4%	4%	4%	4%	5%	5%	6%	6%	7%	8%	9%	10%	11%	12%	13%
Sat, 23 Nov	🌫 39%	🌫 44%	48%	52%	56%	🌫 59%	🌫 61%	🌫 62%	62%	61%	59%	57%	55%	54%	53%	52%
Sun, 24 Nov	48%	47%	46%	45%	43%	42%	42%	46%	52%	55%	54%	51%	48%	45%	42%	39%
Mon, 25 Nov	39%	39%	39%	39%	41%	44%	45%	45%	45%	48%	50%	51%	52%	51%	50%	48%
Tue, 26 Nov	35%	34%	32%	31%	30%	29%	29%	30%	31%	32%	33%	35%	35%	34%	33%	31%
Wed, 27 Nov	26%	25%	23%	21%	19%	17%	16%	16%	18%	19%	20%	22%	23%	23%	23%	22%
Thu, 28 Nov	6%	7%	10%	13%	16%	20%	23%	25%	27%	28%	29%	31%	32%	33%	33%	34%
Fri, 29 Nov	29%	29%	28%	28%	28%	27%	26%	25%	23%	21%	19%	17%	16%	16%	16%	17%
Sat, 30 Nov	19%	18%	17%	16%	15%	14%	13%	14%	15%	16%	17%	18%	19%	18%	17%	16%
Sun, 01 Dec	16%	16%	16%	15%	14%	13%	13%	13%	13%	14%	15%	15%	16%	17%	19%	20%

Percentages are the chance of rain.

Weather data by Open-Meteo

London hourly weather (Met Office)

Sunset: 16:10. Dusk: 16:47. Dark: 17:28. Moon 100% (dusk to dawn)

Updated: Sat, 16-Nov at 02:00

	06	09	12	15	18	21
Today	10%	10%	10%	10%	58%	54%
Sun, 17 Nov	2%	1%	1%	1%	10%	16%
Mon, 18 Nov	57%	53%	53%	54%	60%	62%
Tue, 19 Nov	51%	47%	20%	16%	13%	10%
Wed, 20 Nov	4%	2%	1%	3%	1%	1%
Thu, 21 Nov	2%	3%	2%	2%	3%	2%
Fri, 22 Nov	2%	1%	1%	5%	3%	4%

Percentages are the chance of rain.

Weather data by Met Office

Regional weather (Met Office)

Sunset: 16:10. Dusk: 16:47. Dark: 17:28. Moon 100% (dusk to dawn)

Updated: Sat, 16-Nov at 02:38

South East England

On the cloudy side with some rain Saturday. Turning colder.

• Fine during the evening and overnight, with developing clear spells allowing a slight grass frost and local fog to form in places
• Becoming more generally cloudy in the north towards dawn
• Minimum Temperature 1C

Saturday:

• Brightest in the south first thing, although fog locally slow to clear
• Otherwise periodically becoming cloudier from the north with the odd spot of rain possible, especially into the evening
• Maximum Temperature 11C

Outlook for Sunday to Tuesday:

• Colder but mainly fine Sunday
• Cloudier and windier with some rain Monday, probably giving way to a brighter, colder Tuesday, perhaps with a parting shot of wintry flurries on hills

UK Day 6-7 and week 2

• Cold or very cold conditions are likely to affect most if not all parts of the UK early in this period, with wintry showers affecting in particular northern parts and exposed coastal districts
• Overnight frost will likely be widespread and occasionally strong winds will result in significant wind chill
• However, there may be some more organised areas of rain and snow, accompanied by strong winds, which run across some parts
• This could lead to some disruptive weather at times
• Briefly milder conditions may accompany these in the south
• There is a hint that it may become less cold late in the period, but still likely remain mostly unsettled with further spells of rain and snow

UK Week 3 and 4

• Signals vary in prevailing weather patterns through this period
• In general, there looks like a trend towards drier and more settled conditions, with high pressure potentially being the more dominant influence over the UK
• However
• there is a chance of more changeable weather patterns at times, which would see Atlantic weather systems periodically move across the country
• These will bring some wetter and windier interludes with a risk of some snow, especially for hills in the north
• Temperatures generally close to average, perhaps a little above at times, especially in the south

Weather data by Met Office

London Air Quality (Pollen and UV)

Updated: Sat, 16-Nov at 02:36

Key : Low Medium High Very High

Pollens

These pollens are shown (in season):

• Grass
• Alder and birch (trees)
• Mugwort and Ragweed (weeds)

When out walking, wraparound glasses, a disposable or washable facemask, and being at the front of the group, all help.

Other forecasts: Met Office, University of Worcester

UV and Air Quality

The UV forecast takes account of cloud cover.

"Air Q", the European Air Quality index, is a mix of dust/particulates, ozone, sulphur and nitrous oxides

Data

Weather data by Open-Meteo and CAMS ENSEMBLE

London Visibility

Updated: Sat, 16-Nov at 02:36

Visibility in km. Above 50km is 'good'. Humidity and air pollution make it worse. Theoretical maximum is 300km/200 miles in clean dry polar air.

On the South Downs, at ~ 170m/500ft, the horizon is is ~ 45km/30 miles away. On a mountain at 1,000m/3,000ft, it is ~ 160km/100 miles away. Formula: horizon in km = √ (13 x altitude in m)

Weather data by Open-Meteo

London daylight

Max Height (solar noon) is when the sun is highest in the sky.

Day length is dusk to dawn. Times will vary if there is a hill on the horizon.

After 'Light' (nautical dawn) and before 'Dark' (nautical dusk), the horizon should be visible.

After 'Dawn' (civil dawn) and before 'Dusk' (civil dusk, or lighting up time), there should be enough light to read,

There will be enough light for walking for at least 30 minutes before sunrise and after sunset, even on an overcast day.

London moonlight

Moonlight chart for walking at night.

Notes

• The percentage of the moon which is illuminated doesn't vary much with location.
• A full moon is not just bigger, it is much brighter. A quarter moon (1/2 disk visible) give less than 5% of the illumination of a full moon. You can walk with a quarter moon if its high in the sky (after dusk for a growing moon, before dawn for a shrinking moon).
• Sky glow (light reflected by air or clouds) from nearby cities, and especially snow on the ground also effect light levels.
• Times will vary a few minutes, as (i) these figures are for the centre of the county the walk is in, (ii) if there are hills on the horizon, and (iii) if you are on a hill
• Of course, you need a cloudless night as well!

London weather (Accuweather)