Planning

When to go, by what you want

Pick what matters most. Each answer says who says so.

• IcebergsLate May and early June

  Newfoundland and Labrador Tourism: April and May are when bergs are most plentiful, but they may be locked in sea ice, so late May and early June are suggested for viewing. Source

  Iceberg Alley drives and odds →

• WhalesMay to September

  The province's season, off a coast it says holds the world's largest population of humpbacks. Late June beats early June. Source

  Whales near the airports →

• Puffins and seabirdsMay to August

  The province: the seabirds come ashore only from May to August to breed. Most reports people send GBIF fall in July. Source

  Where puffins are reported →

• Warmest weatherJuly and August

  The only months averaging a daily high of 20 °C or more at all three airports. Gander: 21.6° and 21.1° · Deer Lake: 22.6° and 21.9° · St. John's: 20.7° and 20.5°. Source

• Most sunshineJuly

  Gander: July, 219 hours · St. John's: July, 217 hours. Deer Lake's station publishes no sunshine record. Source

• Least fogDepends hard on the door

  Between May and October: Gander: fewest in September (5.1 days), most in May (10.6 days) · Deer Lake: fewest in May (1 day), most in September (4.5 days) · St. John's: fewest in October (7.1 days), most in May (15.8 days). St. John's is the foggy one, most of all in spring. Source

• DriestMidsummer

  Fewest wet days (rain or drizzle of 0.2 mm or more) between May and October: Gander: August, 15.8 wet days · Deer Lake: June, 13.3 wet days · St. John's: July, 13.6 wet days. Source

• Snow: skiing, snowshoeing, sleddingDecember to March

  Months averaging 20 or more days with at least 5 cm of snow on the ground at one of the airports. Ski hills, groomed trails and snowmobile trails open season by season; the operators and clubs declare it, not the calendar. Days are short: see the daylight column below. Source

  Marble Mountain and the cross-country park →

Not here yet: fall colour. We have no source that dates it, and will not guess.

Month by month at each airport

Averages, not a forecast: Environment and Climate Change Canada's climate normals, 1981–2010, at each airport's weather station. High and low are the average daily high and low in °C; wet days are days with 0.2 mm or more of rain or snow, and fog days days with any fog, each averaged over the month. Daylight is sunrise to sunset on the 15th, worked out from the airport's latitude.

Environment and Climate Change Canada, Canadian Climate Normals (api.weather.gc.ca, climate-normals), read 2026-10-08. The coast and the interior differ: a headland can sit in fog while the airport is clear.