Friday 21 August is forecast to be cool, cloudy and increasingly unsettled, with the highest chance of rain from mid-afternoon into the early evening.
Temperatures are expected to peak at around 18C before falling to 13C overnight.
Early morning
Friday will begin cool and mostly cloudy, with some brighter spells developing after sunrise.
Temperatures are expected to be around 12C at 5am, dipping to 11C by 6am, before rising to 12C at 7am and 13C by 8am.
The chance of rain is around 10% at 5am, then falls below 5% from 6am to 8am.
Winds will come mainly from the north-north-west and north at around 4mph, with gusts between around 11mph and 15mph.
Visibility will remain very good. Humidity will be high early on, around 82% to 83%, before easing to around 76% by 8am.
Midday
Late morning and lunchtime will stay mostly dry, with cloud and some sunny intervals.
Temperatures are forecast to rise from 15C at 10am to 17C by 11am and 18C by midday. The “feels like” temperature will be slightly lower, around 15C to 17C.
The chance of rain is around 10% at 9am and 10am, then falls below 5% by 11am and midday.
Winds will come from the north at around 5mph, with gusts increasing to around 17mph to 19mph.
Visibility will remain very good, while humidity will fall from around 60% at 10am to 45% by midday. UV levels will be moderate, reaching around 5 by late morning and lunchtime.
Afternoon
The afternoon is expected to turn cloudier and more unsettled, with the chance of rain increasing later.
Temperatures are forecast to stay around 18C from 1pm to 4pm, although it may feel closer to 16C or 17C at times.
The chance of rain is around 10% at 1pm, rising to 20% by 2pm, 30% by 3pm and 50% by 4pm.
Winds will come from the north at around 5mph to 8mph, with gusts strengthening from around 19mph to 25mph.
Visibility will remain very good. Humidity will rise from around 42% early in the afternoon to 58% by 4pm. UV levels will ease from moderate to low later in the day.
Evening
The evening will remain cloudy and cool, with rain most likely early on before the risk gradually reduces.
Temperatures are expected to fall from around 17C at 5pm to 16C by 6pm, 7pm and 8pm. It will become cooler later, dropping to 15C by 9pm, 14C by 10pm and 13C by 11pm.
The chance of rain is around 60% at 5pm, 50% at 6pm and 30% at 7pm. It then falls to around 10% from 8pm to 10pm, before dropping below 5% by 11pm.
Winds will come from the north or north-north-east, generally around 5mph to 8mph. Gusts will ease from around 23mph early in the evening to around 12mph by 11pm.
Visibility will remain very good throughout. Humidity will rise gradually from around 65% early in the evening to 73% by 11pm.
