After university studies, Clare Nasir joined the Met Office, training to become a qualified weather forecaster. Two years later, Clare Nasir joined the Met Office’s London Weather Centre, offering weather forecasting and presenting services to London radio stations and media outlets. Subsequently, she took a position as forecaster and presenter for Anglia Television in 1997. She returned to London to work for Carlton Television in 1998.
In 2001 Clare Nasir was made weather producer and presenter being responsible for all weather output and weather-related features on GMTV. GMTV forecasts include outside broadcasts, the most famous of which involves Clare Nasir reporting from Bridlington seafront. Being lashed by wind and rain, in the middle of the report an enormous wave burst over the harbour wall, completely covering her and sending her flying out of shot. Undeterred, she picked herself up and finished her report, having to speak directly into the boom microphone as she had lost her microphone pack.
On 1 August 2010, the Daily Mirror announced Clare Nasir is to quit GMTV prior to the following month, to launch a fitness DVD. On 3 September 2010, on the final broadcast of GMTV, Clare presented her last weather forecast. From 20 November 2010 until 27 October 2013, Clare Nasir presented weather forecasts for the ITN produced regional news programme ITV News London on ITV London.
In June 2012 Clare Nasir presented weather forecasts for the ITN produced 5 News on Channel 5 and has since made occasional appearances. As of 4 October 2013, Clare Nasir has presented weather forecasts for the BBC North West produced regional news programme BBC North West Tonight.