From the report "Tourism Survey III Quarter 2016" by the Central Bank:

In the third quarter of 2016 in terms of inbound tourism, the average daily expenditure per capita recorded a rise of 8.5 percent compared with the previous quarter, mainly driven by increased spending by visitors from Europe (36.1%). The interannual variation of average expenditure was 18.2 percent. In contrast, the average length of stay recorded a fall of 7.5 percent compared with the previous quarter, impacted by less stays by tourists from Europe (-34.3%) and South America (-15.7%). The annual rate of change of the average length of stay was -7.9 percent.

The average stay of inbound tourism was 8.9 days, reflecting a variation of -7.9 percent year on year and -7.5 percent compared to the previous quarter. 

The average per capita daily spending by these visitors was $48.7, mainly influenced by expenditure on the part of tourists from North America and South America. This represented a variation of 2.4 percent year on year and of 4.4 percent compared to the previous quarter.

During this quarter, cruise ships entering the ports of San Juan del Sur and Corinto, recorded an average expenditure of $97.6 and $32.8 per passenger, respectively.

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Tourist Spending Down 18%

September 2018

Between the first and second quarters of the year, the average daily per capita expenditure made by tourists who arrived in Nicaragua fell from $45.7 to $37.7.

From a report by the Central Bank of Nicaragua:

September 19, 2018. The average daily per capita expenditure made by incoming tourists was 37.7 dollars in the second quarter of the year and registered a decrease of 17.5 percent compared to the previous quarter, highlighting spending by tourists from other regions and North America, however, due to the affluence of tourists who visited the country, spending by tourists from Central America and North America has greater relevance. Year-on-year, this indicator reflected a decrease of 17.3 percent 

Tourists Stay Longer in Nicaragua

November 2017

In the third quarter of this year tourists who arrived in the country stayed an average of 10.3 days, registering an increase of 15% compared to the same period in 2016.

From a report by the Central Bank of Nicaragua:

The Central Bank of Nicaragua (BCN) published on November 24, 2017 the Tourism Survey Report for the third quarter of 2017. 

Nicaragua: Daily Expenditure of Tourists Up 8%

March 2017

In 2016 the average duration of tourist visits was 9% higher than in 2015, and daily spending grew by 8% compared to the previous year.

From a report by the Central Bank of Nicaragua:

The Central Bank of Nicaragua (BCN) published on March 21, 2017, its Annual Report, with the main indicators from the 2016 Tourism Survey.

Nicaragua: Tourism Figures II Quarter 2016

August 2016

The average amount spent per day by tourists during the second quarter was $44.9, just 2.4% more than in the same period in 2015.

From the report "Tourism Survey II quarter 2016," by the Central Bank:

The average stay of inbound tourism was 9.7 days in  the second quarter, reflecting a variation of 13.8 percent year on year and -4.3 percent compared to the previous quarter. The average per capita daily spending by these visitors was $44.9, mainly influenced by expenditure on the part of tourists from North America and Other Regions. This represented a variation of 2.4 percent year on year and 4.4 percent from the previous quarter.