Note: St. Catharines has a very small astronomical tide — about 1 cm between high and low water. Day-to-day changes in water level here are driven mainly by wind, air pressure and seiche rather than the tide, so observed levels can differ noticeably from these predictions.
Today — Thu, Sep 17
- Low Tide1:27 AM0.21m (0.7ft) LAT
Sat, Sep 19
- Low Tide7:22 PM0.20m (0.7ft) LAT






Station Details
- Location
- Port Weller Ontario, Ontario, Canada
- Coordinates
- 43.2400°N, 79.2200°W
- Station ID
- port_weller_ontario-13030-can-meds
- Type
- Reference (harmonic)
- Timezone
- America/Toronto
- Datum
- LAT (Lowest Astronomical Tide)
- Source
- TICON-4 (SHOM)
Tide Chart for Port Weller Ontario
Sun
Moon
Tidal Conditions
Fishing & Tides at St. Catharines — Friday, September 18
Best fishing times today
- Minor10:06 PM – 11:06 PM
- Major5:49 AM – 7:49 AM☀ prime
- Minor2:33 PM – 3:33 PM
- Major6:15 PM – 8:15 PM☀ prime
The moon is at a quarter phase, so today's high and low tides are closer together than usual.