New research shows that Irish based retailers' sales were 68% higher on Black Friday compared to a normal Friday, while sales on Cyber Monday were 25% higher.
Ecommerce software company XSellco reviewed the sales trends of 1,200 Amazon retailers from last year to help its customers better prepare for this year's events.
Its research showed that consumer electronics were the most popular category for big ticket items over the weekend.
Mobile phones were the biggest sellers in 2015, increasing by 84% over the normal weekend. Sales of tablets rocketed 134% higher, while sales of televisions were up 69%.
The "Kick your Amazon sales into overdrive" report also advises retailers - both Irish and international - on how to maximise their sales by looking at trends at different time and in different countries.
"International sales events like Black Friday and Cyber Monday can make or break on online seller," commented XSellco's chief executive Victor Corcoran.
"Shoppers are clearly delaying spending on big ticket items so that they can take advantage of sales promotions over the weekend, so it is essential retailers grab their attention with unbeatable deals," he added.
Ecommerce will account for 9% of global sales this year, according to eMarketer. This is set to rise to 15% by 2020.
Research from Visa Europe showed that ecommerce spending in Ireland rose by 11% in November last year.