Southern in Septemberhow the month reads

• Closed
  Natural ice caves (Vatnajokull)

  the natural caves melt and become unsafe outside the cold months; the year-round man-made ice tunnel is a different trip

  Source: guidetoiceland.is

• Limited
  Highland F-roads (Landmannalaugar, Askja)

  roads start closing again as the first snows arrive; check the official road status the morning you drive

  Sources: mapoficeland.is, camper.is

• Limited
  Laugavegur trek

  the edges of the season - it opens with the F-roads around mid-June and winds down through September

  Sources: guidetoiceland.is, mapoficeland.is

Opening seasons are checked by hand against the operators and parks themselves, not derived from the climate figures on this page. Last reviewed 2026-08-28. Dates move — confirm before you book.

• Temperature
  8°C
  +3.4°C vs. yearly mean
• Month rank
  9 of 12
  for Southern
• Best months
  June · July · January
  highest regional score

Parts of Iceland carry a higher advisory — up to level 2, "Exercise increased caution". The governments concerned name a region rather than a boundary, so the carve-out is not drawn on the map and is not reflected in the combined level above. Follow the source links for where it applies.