If France is in the grip of a heatwave you may need to alter your plans - here are some suggestions for fun activities to do when the temperature soars. If you're visiting France during the summer you will need to keep an eye on the weather forecasts, and any weather warnings issued by the French weather forecaster Météo France. French heatwaves are no joke - people die during the most extreme temperatures - so flexibility is the key, as well as following official advice on what activities are safe to do. Swim - Absolutely the number one way of cooling off during hot weather is to go for a dip. This also explains why French people become (even more) keen on cinema at peak heatwave - most cinemas are equipped with air conditioning.