Brewers are still waiting for a long hot spell to boost beer sales. So far the summer sunshine, at best, has been sporadic and temperatures are below average. Bass sales director Kevin Brownsey said: "In early June there was a prolonged hot spell and sales were superb, but they fell back in July when it cooled down." Scottish Courage said the average temperature for June was 18.1C, against last year's average for the period of 18.7C. The brewers' rule of thumb is that every degree above 20C adds 3% (400,000 cases) to the total beer market. Brownsey said: "The three weeks of good weather early on had a significant impact. We could hardly satisfy demand for some Grolsch and Carling packs." He said the brewer was having a good year. In the last 12 months Carling volumes have increased 23% and Grolsch is up 96%. The best results have come through the multiple grocers. Scottish marketing director Brian Sharp said: "Foster's had an exceptional month in June. "Its volumes were up 46% and Foster's Ice increased by 162% [ACNielsen Scantrack]. "This shows what can be achieved through investing in strong brands during the summer months." {{DRINKS }}