Before you set out
Sete Cidades: viewpoint and village are different stops
Decide whether you want the crater panorama or time by the lake. A bus to the village is not a transfer to every viewpoint. If cloud covers the rim, stay with the lower route or move the panorama to another day.
Lagoa do Fogo: plan the access separately
Check the shuttle operator and access notice for the date you are travelling, especially during seasonal restrictions. A roadside viewpoint is not the start of the official lake walk. Use the regional trail information and respect signs on the ground.
Furnas: lake, village and thermal visit
Pick a village walk or the signed lake route as your main outing, then add a thermal session only if timing and access work. Stay on permitted paths around fumaroles and do not treat unmanaged geothermal water as a bathing site.
Plan for the season and the day
At the Ponta Delgada observatory, December averaged about 153 mm of rain and July about 26 mm in 1991–2020. In winter, leave room for a town or garden day. In summer, check the Fogo shuttle for your dates. Use the current forecast for any high viewpoint.