Tonight in Merthyr Tydfil
Decent sleeping conditions
Mostly comfortable.
Sleep Score
7
⁄10
Comfortable
Overnight low
15°C
Cool and sleepable
Stickiness
15°C
Slightly muggy
Cooling by 4am
-0.1°C
Barely cools at all
Tonight's plan
Cool and fresh tonight — the kind of night your body sleeps best in.
Windows
Open
Cool air tonight — let it in
Heating
Off
Warm enough — heating would make it harder to sleep, not easier
Bedding
Normal duvet
Standard weight — tonight sits right in the comfortable range
Fan
Not needed
Cool enough without — save the electricity
Based on temperature, dew point, wind, and overnight cooling
Why this matters
15°C is cool — ideal for sleep depth. Research shows deeper slow-wave sleep in cooler bedrooms, as long as the room stays above about 16°C. If your bedroom drops below that, sleep quality starts to decline again.
The week ahead
Mon will be the best night, sun the worst.
Merthyr Tydfil · next 7 nights
Tonight is a good one. Enjoy it.