Clear skies will return on Wednesday with temperatures climbing to around 19 degrees Celsius on the coast and 18°C inland, the Meteorological Service said.
Higher mountain areas will see temperatures reach around 6°C. Northeasterly winds will blow at moderate to strong force 4-5.
The sea will be slight to moderate.
Thursday will stay mainly clear before partly cloudy conditions return on Friday and Saturday.
Temperatures will rise on Thursday with no significant change through Saturday, remaining slightly above average climatological values during the three-day period.