SeasonMapSt. John's, Newfoundland (St. John's) weather in August
Canada
August in St. John's, Newfoundland: nice, a little rain, with clean air — one of the best months to visit.
#2 of 12 months in St. John's, Newfoundland · #342 of 1383 destinations to visit in August · comfort 88/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on St. John's, Newfoundland in August
Newfoundland's forum calls late July into August the best chance for good weather, typically around 20°C but genuinely variable — anything from a cool, wet day to full sun. Regulars are consistent that Newfoundland is rarely hot and often feels cooler than the number suggests thanks to the wind, so a rain coat and layers matter more than a summer wardrobe.
Add your own note from St. John's, Newfoundland's card on the map.
St. John's, Newfoundland climate normals — August
| Daytime high | 23°C / 73°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 53°F | |
| Feels like (high) | 22°C / 72°F | |
| Sea temperature | 13°C / 55°F | 🥶 cold sea |
| Rainfall | 78 mm / 3.1 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 8.7 h/day | |
| Daylight | 14.2 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in St. John's, Newfoundland in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsGeorge Street Festival, Royal St John's Regatta, Summer break in Canada(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for St. John's, Newfoundland's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherSt. John's, Newfoundland's weather peaks June–August, best around July.
August includes Puffins at Witless Bay.
Best weatherFair weatherToughest weather
What's on in St. John's, Newfoundland in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Puffins at Witless Bay
15 May – 15 Aug · usuallyBirdlife seasonHundreds of thousands of puffins and murres nest on the islands half an hour south of town, reachable on a two-hour boat that usually finds whales on the same trip.
- Nature
Humpbacks and the capelin roll
1 Jun – 31 Aug · usuallyWhale seasonHumpbacks follow the capelin inshore in June and stay through the summer. The capelin themselves spawn onto the beaches in a few days somewhere around the turn of July, and people fill buckets.
- Festival
George Street Festival
29 Jul – 5 Aug · usuallyMajor festivalCrowdedA week of outdoor concerts on a two-block street that is nothing but bars, ending the night before the Regatta. The two are planned as one long week here. Source ↗
- Festival
Royal St John's Regatta
3–9 Aug · usuallyMajor festivalClosuresCrowdedFixed-seat rowing on Quidi Vidi Lake on the first Wednesday of August, and the only civic holiday in the country decided by a wind call at six in the morning. If it blows, everyone goes to work. Source ↗
Where is St. John's, Newfoundland?
St. John's, Newfoundland in August — FAQ
- Is August a good time to visit St. John's, Newfoundland?
- August in St. John's, Newfoundland: nice, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for St. John's, Newfoundland on SeasonMap's comfort score (88/100).
- What is the weather like in St. John's, Newfoundland in August?
- In August, St. John's, Newfoundland averages a daily high of 22.6°C and a low of 11.9°C, with about 77.6 mm of rain over roughly 10.2 rainy days.
- What is the air quality in St. John's, Newfoundland in August?
- St. John's, Newfoundland has a mean US Air Quality Index of about 36 in August.