The ancient landscape of Gros Morne National Park is a UNESCO World Heritage Site.
Gros Morne is beautiful year round but is best visited between late May and Mid October. The temperatures are pleasant and whales can be spotted (in July/August) as well as some icebergs (in June).
It’s unpredictable and often changes very dynamically. Also prepare yourself for hikes to higher elevations, as it is much cooler there.
May - October (warmer months): Temperatures become pleasant in May: 5-11°C (41-52°F). However, many hiking trails remain partly snow covered throughout May. Also hiking/climbing Gros Morne Mountain summit is not permitted until the beginning of July. In June it gets warmer: 5ºC- 20ºC (40-70ºF). The months of July and August bring the warmest and driest conditions: Average daytime temperature 16–25 °C (61–77°F). September and October temperatures are still pleasant. In October they drop to 5-10°C (41-50°F).
November - April (cooler months): Especially January, February and March are the best months for winter/snow activities. In years of higher snowfall, skiing is even possible into late April. Temperatures range from −10-0°C / 14-32°F.
The warmest months of July and August are also the peak tourist months. However, even during high season it’s never heavily crowded in Gros Morne National Park. The only limitations are the tight accommodations in July/August. Book early if you plan to visit in summer.
Highlights (Icebergs, Whale Watching):
A few icebergs can be seen from May until early July. Visit from mid-May until late June to be on the safe side (Iceberg Facts). However, the much better spots to view them are along the east cost. They are traveling from the north (St. Anthony) to the south, passing Twillingate, then Bonavista. The best months for whale watching are July and August, as they follow their food sources. You will increase your chances off seeing whales by taking a boat tour in Gros Morne NP. In some areas you can still see them in September. Also wildflowers bloom during most of the summer.