Thorold (CATHD) — marine weather & port guide
Thorold is a port in Canada at 43°5.0′N 79°43.0′W. Today (Aug 3): WNW wind 12–19 kn, waves 0.4–0.9 m, from the ECMWF IFS run 2026-08-03 12z. The live chart on this page shows current conditions and plans weather-optimized departures from this harbor.
Port facts (NGA World Port Index)| Position | 43°5.0′N 79°43.0′W |
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| UN/LOCODE | CATHD |
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| Harbor size | Small |
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| Harbor type | Lake or canal harbor |
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| Shelter | Good |
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| Channel depth | 8 m |
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| Tide range | 0 m |
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| Pilotage | Compulsory |
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| Time zone | America/Toronto |
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10-day marine forecast — Thorold
| Date | Wind | Gusts | Waves |
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| WNW 12–19 kn | 21 kn | 0.4–0.9 m |
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| WNW 4–10 kn | 12 kn | 0.1–0.3 m |
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| SE 4–7 kn | 9 kn | 0.1–0.1 m |
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| SW 4–9 kn | 16 kn | 0.1–0.2 m |
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| WNW 3–8 kn | 10 kn | 0.1–0.2 m |
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| WSW 5–8 kn | 10 kn | 0.1–0.4 m |
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| SW 12–13 kn | 16 kn | 0.3–0.4 m |
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| SSW 20–20 kn | 25 kn | 0.6–0.6 m |
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| WSW 7–7 kn | 14 kn | 0.2–0.2 m |
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| WNW 6–6 kn | 16 kn | 0.3–0.3 m |
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Forecast from the ECMWF IFS model run , waves from ECMWF WAM. Updated with each model cycle; the live chart below recalculates for your departure time and vessel.
Frequently asked
How is the weather at Thorold right now?
As of the ECMWF IFS run 2026-08-03 12z: WNW wind 12–19 kn, waves 0.4–0.9 m. The 10-day outlook is in the forecast table on this page and updates with each model cycle.
How big is the harbor at Thorold?
Thorold is classed as a small harbor (lake or canal harbor), with good shelter in the NGA World Port Index.
How deep is the approach to Thorold?
Per the NGA World Port Index, the entrance channel carries about 8 m. Verify against current official charts before entry.
What restricts entry to Thorold?
Entry is affected by overhead clearance limits. Check the live forecast on this page and official notices before approach.