⛈ Boating Conditions
⛈ 7-Day Forecast
St. Catherines
📊 Source:
National Weather Service
— weather.gov
For informational purposes only — verify conditions before departure.
Forecast retrieved September 21, 2026 03:15 PM
Today
86°F
Wind: 7 mph E
Gusts: —
A slight chance of showers and thunderstorms before 2pm. Mostly sunny, with a high near 86. East wind around 7 mph. Chance of precipitation is 20%.
💧 20% precip.
Tonight
75°F
Wind: 0 to 6 mph E
Gusts: —
A slight chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 75. East wind 0 to 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
💧 23% precip.
Tuesday
86°F
Wind: 0 to 7 mph NE
Gusts: —
A chance of rain showers before 10am, then a chance of showers and thunderstorms between 11am and 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 86. Northeast wind 0 to 7 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
💧 34% precip.
Tuesday Night
75°F
Wind: 1 to 6 mph E
Gusts: —
A slight chance of showers and thunderstorms between 8pm and 2am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 75. East wind 1 to 6 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
💧 48% precip.
Wednesday
85°F
Wind: 3 to 12 mph NE
Gusts: —
Showers and thunderstorms likely. Mostly sunny, with a high near 85. Northeast wind 3 to 12 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
💧 67% precip.
Wednesday Night
72°F
Wind: 9 to 13 mph NE
Gusts: —
Showers and thunderstorms likely before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers and thunderstorms between 11pm and 2am. Partly cloudy, with a low around 72. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
💧 67% precip.
Thursday
82°F
Wind: 15 mph NE
Gusts: —
A slight chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 82. Chance of precipitation is 20%.
💧 23% precip.
Thursday Night
68°F
Wind: 14 to 18 mph N
Gusts: —
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
💧 23% precip.
Friday
80°F
Wind: 8 to 16 mph NE
Gusts: —
Mostly sunny, with a high near 80.
💧 5% precip.
Friday Night
67°F
Wind: 8 mph NE
Gusts: —
Mostly clear, with a low around 67.
💧 5% precip.
Saturday
81°F
Wind: 9 mph NE
Gusts: —
Sunny, with a high near 81.
💧 4% precip.
Saturday Night
68°F
Wind: 6 mph NE
Gusts: —
Mostly clear, with a low around 68.
💧 4% precip.
Sunday
81°F
Wind: 7 mph NE
Gusts: —
Mostly sunny, with a high near 81.
💧 7% precip.
Sunday Night
69°F
Wind: 2 to 7 mph E
Gusts: —
Partly cloudy, with a low around 69.
💧 8% precip.