Temperatures have hovered around 27C (80.6F) since Monday in a city generally more accustomed to cloud and rain, even in the summer months.
To their delight, Games fans have been able to leave their umbrellas at home and instead have been stocking up on bottled water and sun cream.
At outdoor events such as the hockey at Glasgow Green, spectators in their sunglasses have been topping up their tans while supporting their favourite team.
In the city centre, cafe and restaurant terraces are packed with customers enjoying the unusually prolonged sunny spell.
The Salvation Army said its volunteers have already handed out more than seven tonnes of water to visitors at Central Station.
The picture is set to change from tomorrow, however, with the temperature dropping to 19C (66.2F) by Sunday.
John Lee, a forecaster with MeteoGroup, said: "It will start off warm and sunny but it's going to get cloudy in the afternoon with rain moving in from the west.
"That sets the scene for the next few days.
"The cold front is going to go through, lowering the temperature. There are going to be showers, and some of them could be heavy and cause disruption to the Games.
"Temperatures have been well above average and they are set to return to average. It's going to be cooler and more unsettled."