Among the rescued migrants were 35 children and a baby.
They were in 15 vessels, including toy paddle boats and a jet ski.
Many of Spain’s recent migrant arrivals have attempted to reach the country using cheap, child-sized paddle boats without motors that allow them to avoid using people smuggling networks.
Three times as many migrants arrived in Spain in the first half of 2017 compared to the same period in 2016, International Organisation for Migration (IOM) figures show.
More than 11,000 migrants have arrived in Spain in the first half of 2017, 8,300 of whom have come by boat.
However, in the whole of last year only 13,246 migrants arrived in Spain.
Many of those arriving are from west African countries, such as Senegal, Gambia, Guinea and Ivory Coast.
Senior IOM spokesman Joel Millman has said: “We assume that some of the change is due to the fact that the route [to Spain] is considered a safe route up to the coast through Morocco.”
There are migrants who have used social media to contact the Spanish authorities and inform them of their location once they are in territorial waters, it has been reported.
A much larger number of migrants – nearly 100,000 – have crossed from Libya to Italy since the start of the year, with the IOM saying 2,242 people have died on that route.
In June, Italian coastguards said around 5,000 people were rescued in one day in the Mediterranean off Libya.
Thousands of protesters earlier this year called on the Spanish government to allow people fleeing war-torn areas such as Syria into the country.
Last week, footage also showed roughly 30 migrants arriving by dinghy on a popular Spanish tourist beach in Cádiz.
Police claimed they were powerless to stop the beach drop, as a lack of resources meant only one officer was in the area at the time.