Local met says Friday will be the worst of the 4 days with rain most of the day,sometimes heavy. Saturday should be dry for the display times but rain either side of it and a risk of a shower during and also strong southerly winds all day. Thursday high cloud, occasional sun but dry all day, Sunday dry and reasonably sunny all day. NO thunder is forecast.
However, as with all forecasts this could change in a heartbeat and I take no responsibility when it does!
If anyone is coming down, pop into the centre of town and say hi. I will be on the Bournemouth Aviation Museum stand all 4 days, come rain and shine. We also have our Canberra nose down there to look at/in as well as a large stall selling lots of goodies. I'll be the one in some sort of heavy metal t-shirt!