Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | -0.5 °C | 5.9 °C | 13 days | Unfavourable season |
| February | -0.6 °C | 4.1 °C | 11 days | Unfavourable season |
| March | 2.9 °C | 3.1 °C | 12 days | Unfavourable season |
| April | 8.4 °C | 4.3 °C | 12 days | Unfavourable season |
| May | 14.1 °C | 7.2 °C | 11 days | Possible, with trade-offs |
| June | 18.2 °C | 10.4 °C | 13 days | Possible, with trade-offs |
| July | 21.6 °C | 13.2 °C | 11 days | Pleasant — a good time to go |
| August | 21.8 °C | 14.8 °C | 11 days | Pleasant — a good time to go |
| September | 19 °C | 14.2 °C | 9 days | Possible, with trade-offs |
| October | 13.8 °C | 12.5 °C | 11 days | Possible, with trade-offs |
| November | 7.3 °C | 10.8 °C | 11 days | Unfavourable season |
| December | 2.3 °C | 8.4 °C | 12 days | Unfavourable season |
Nearby in September
Before you go
Three things to check once you have picked your dates.
Entry
No visa, but an electronic travel authorisation (eTA) must be obtained online before departure for stays of up to 180 days. Passport valid until your return date. Apply for the eTA on the official Canadian government site only; you may be asked for a return ticket and proof of funds.
For a British passport, per the UK Foreign Office on 2 June 2026. Rules change: check before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 2 June 2026
Health
Vaccines · hepatitis B if you are not already vaccinated; hepatitis A depending on activities and areas visited. Routine vaccines up to date (measles in particular).
Yellow fever · No yellow fever locally, vaccine not recommended. No entry requirement.
Malaria · None.
Per the CDC (page reviewed 25 August 2026); see a travel clinic a few weeks before departure.
Beau Fixe is not a safety or health authority. These notes summarise dated public texts and link to their source: France Diplomatie (Licence Ouverte 2.0), Foreign, Commonwealth & Development Office (gov.uk, Open Government Licence v3.0), Centers for Disease Control and Prevention (Source: CDC). Only the competent authorities are authoritative.
FAQ
Can you swim in Saint John in September?
The sea averages 14.2°C in September — too cold for most swimmers.
How hot is Saint John in September?
Expect 19°C in the afternoon and 12.6°C at night, averaged over the last 10 years.
Does it rain a lot in Saint John in September?
Around 9 days with rain (≥ 1 mm) in the month — 30% of days.