Tonight in Lewisham
Decent sleeping conditions
Mostly comfortable.
Sleep Score
6
⁄10
Mostly fine
Overnight low
19°C
Warmer than ideal
Stickiness
14°C
Neutral
Cooling by 4am
0.5°C
Barely cools at all
Tonight's plan
A touch warm tonight, but nothing a light sheet won't fix.
Windows
Open
Cool air tonight — let it in
Heating
Off
Warm enough — heating would make it harder to sleep, not easier
Bedding
Light duvet or top sheet
Enough to feel covered, light enough to not trap heat
Fan
Not needed
Cool enough without — save the electricity
Based on temperature, dew point, wind, and overnight cooling
Why this matters
19°C is above the ideal 16–18°C range, but not dramatically. Most people will still fall asleep — it's staying asleep through the early hours that becomes harder, because your body can't complete its natural cooling cycle.
The air barely cools overnight — just 0.5°C between bedtime and 4am. Your body's circadian rhythm expects a temperature dip during the night. When the environment doesn't provide one, sleep becomes lighter and more fragmented, even if you don't fully wake.
The week ahead
Mon will be the best night, thu the worst.
Lewisham · next 7 nights
Next great sleep night: Sun.
Nearby tonight