Latest weather updates and forecast for Lewisham.
Source: Data referenced in this article is taken from https://www.metoffice.gov.uk
Today, September 19, 2026, Lewisham will experience overcast conditions throughout the day. The maximum temperature is forecast to be 22°C, providing a mild and pleasant atmosphere. The minimum temperature is expected to be around 15°C, ensuring that evenings will remain relatively warm. The average temperature for the day is projected to be 18.5°C. Wind speeds could reach up to 51.5 kph, which might be noticeable but not disruptive. The high humidity of 87% is a significant factor for today’s weather, potentially making the air feel more muggy than the temperature might suggest. There is a very low probability of precipitation, with the chance of rain being less than 5%. Tomorrow, September 20, will bring sunshine and a slight drop in temperature, with a high of 21°C and a low of 11°C. This sunny trend is expected to continue through September 21, with temperatures rising to a high of 23°C. The warmest day of the upcoming week appears to be September 22, with a high of 25°C and a low of 17°C, featuring sunny intervals. For instance, September 23 will have a high of 23°C and a low of 13°C, while September 24 will see a high of 21°C and a low of 14°C. The week concludes with sunny intervals on September 25, with a high of 23°C and a low of 12°C.
The latter half of the week will see a mix of sunny intervals, with temperatures generally remaining in the low to mid-20s Celsius. Overall, the upcoming week promises a transition from overcast and humid to predominantly sunny and pleasant conditions. Following today’s overcast conditions, the weather in Lewisham is set to improve significantly.