Saint John Water Temperature

(Today) 2025

11.5°C / 52.7°F

The water will feel cool (fresh). Probably too cold for all but seasoned swimmers. We'd recommend a 4mm or 5mm wetsuit if you want to stay in the water.

Current weather

17°C / 63°F
(overcast clouds)
Partly cloudy
Wind
8 mph
Humidity
82%

The measurements for the water temperature in Saint John, New Brunswick are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Saint John water temperature derived from many years of historical sea surface temperature data.

Saint John average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Saint John
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.6 1.4 1.4 2.3 4.2 7.1 10.5 11.8 10.9 8.7 6.5 3.6
Max °C 5.9 3.9 3.3 5.4 8.5 12 14.7 14.9 14 12.1 9.6 7.8
Min °F 36.6 35.5 35.2 37.3 41.2 46.7 52.6 54.4 52.8 49 44.9 40.2
Max °F 40.9 38 37.1 40.4 45.5 51.6 56.8 57.5 55.9 52.4 48 44.4

The warmest water temperature is in August with an average around 55.9°F / 13.3°C. The coldest month is March with an average water temperature of 36.1°F / 2.3°C.

7 day tide forecast for Saint John

FriSatSunMonTueWedThu
  • High 12:44am
    (7.59m)
  • Low 7:04am
    (1.24m)
  • High 1:13pm
    (7.16m)
  • Low 7:18pm
    (1.64m)
  • High 1:24am
    (7.71m)
  • Low 7:44am
    (1.12m)
  • High 1:52pm
    (7.29m)
  • Low 7:58pm
    (1.51m)
  • High 2:05am
    (7.8m)
  • Low 8:23am
    (1.02m)
  • High 2:32pm
    (7.41m)
  • Low 8:40pm
    (1.4m)
  • High 2:47am
    (7.82m)
  • Low 9:05am
    (0.97m)
  • High 3:14pm
    (7.52m)
  • Low 9:24pm
    (1.32m)
  • High 3:31am
    (7.78m)
  • Low 9:48am
    (0.98m)
  • High 3:58pm
    (7.6m)
  • Low 10:11pm
    (1.28m)
  • High 4:18am
    (7.68m)
  • Low 10:35am
    (1.05m)
  • High 4:45pm
    (7.66m)
  • Low 11:00pm
    (1.26m)
  • High 5:09am
    (7.54m)
  • Low 11:25am
    (1.15m)
  • High 5:35pm
    (7.69m)
  • Low 11:54pm
    (1.25m)
7 day tide times for Saint John

*These tide times are estimates based on the nearest accurate location (Saint John, New Brunswick) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.