About St. Catherines
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COORDINATES
43.18966 N, -79.31605 E
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Weather Forecast
Sun
5AM - 9AM
15 March 2026
E 10–19 knots. Gusts up to 21 knots.
−1°C
E 0.4m at 2s period
UV Index: 0 - Low
Chance of showers
Sun
9AM - 1PM
15 March 2026
- E 12–24 knots. Gusts up to 26 knots.
- −1 to 1°C
- NE 0.6-1.1m at 4s period
- UV Index: 0 - Low
- Rain
Sun
1PM - 5PM
15 March 2026
- E 19 knots decreasing to 9 knots. Gusts up to 25 knots.
- 1 to 4°C
- NE 1.1m at 5s period
- UV Index: 2 - Low
- Chance of showers
Sun
5PM - 9PM
15 March 2026
- E 7 knots increasing to S 15 knots. Gusts up to 26 knots.
- 4 to 7°C
- NE 0.9m at 5s period
- UV Index: 0 - Low
- Cloudy
Sun
9PM - 5AM
15 March 2026
- S 16–23 knots. Gusts up to 33 knots.
- 7 to 10°C
- S 0.7-1.0m at 3s period
- UV Index: 0 - Low
- Cloudy
Mon
5AM - 9AM
16 March 2026
- S 17–20 knots. Gusts up to 31 knots.
- 8 to 11°C
- S 0.7m at 3s period
- UV Index: 0 - Low
- Cloudy
Mon
9AM - 1PM
16 March 2026
- S 16–23 knots veering SW 16-23 knots. Gusts up to 29 knots.
- Decreasing from 10 to 7°C
- S 0.6m at 3s period
- UV Index: 0 - Low
- Chance of showers
Mon
1PM - 5PM
16 March 2026
- SW 21 knots increasing to 24 knots. Gusts up to 35 knots.
- 3 to 8°C
- SW 0.5-0.8m at 3s period
- UV Index: 1 - Low
- Cloudy
Mon
5PM - 9PM
16 March 2026
- W 25 knots decreasing to 18 knots. Gusts up to 37 knots.
- Decreasing from 4 to 0°C
- W 0.9m at 3s period
- UV Index: 0 - Low
- Cloudy
Mon
9PM - 5AM
16 March 2026
- W 10–32 knots.
- −6 to 0°C
- W 1.0-1.7m at 4s period
- Cloudy
Tue
5AM - 9AM
17 March 2026
- W 12–29 knots. Gusts up to 34 knots.
- −7 to −5°C
- W 1.6m at 5s period
- Cloudy
Tue
9AM - 1PM
17 March 2026
- W 10–24 knots. Gusts up to 29 knots.
- −7 to −5°C
- W 1.4m at 4s period
- Cloudy
Tue
1PM - 5PM
17 March 2026
- W 7–23 knots.
- −4°C
- W 1.2m at 4s period
- Chance of showers
Tue
5PM - 9PM
17 March 2026
- W 10–21 knots. Gusts up to 25 knots.
- −9 to −4°C
- NW 1.0m at 4s period
- Cloudy
Tue
9PM - 5AM
17 March 2026
- W 13 knots decreasing to 7 knots. Gusts up to 23 knots.
- −13 to −4°C
- NW 0.5-0.9m at 3s period
- Partly cloudy
Wed
5AM - 9AM
18 March 2026
- W 8 knots decreasing to 4 knots.
- −13 to −5°C
- NW 0.4m at 3s period
- Partly cloudy
Wed
9AM - 1PM
18 March 2026
- SW 4 knots increasing to 8 knots.
- Increasing from −7 to −2°C
- Calm sea
- Partly cloudy
Wed
1PM - 5PM
18 March 2026
- S 6–9 knots.
- −3 to −1°C
- SW 0.4m at 2s period
- Partly cloudy
Wed
5PM - 9PM
18 March 2026
- SW 9 knots decreasing to SE 6 knots.
- −1°C
- Calm sea
- Cloudy
Wed
9PM - 5AM
18 March 2026
- S 5–10 knots. Gusts up to 18 knots.
- −2 to 0°C
- Calm sea
- Cloudy
Thu
5AM - 9AM
19 March 2026
- S 8 knots.
- 0°C
- Calm sea
- Cloudy
Thu
9AM - 1PM
19 March 2026
- S 8–10 knots.
- 0 to 3°C
- Calm sea
- Cloudy
Thu
1PM - 5PM
19 March 2026
- S 6–10 knots.
- 2 to 4°C
- Calm sea
- Cloudy
Thu
5PM - 9PM
19 March 2026
- SW 3–12 knots. Gusts up to 17 knots.
- 1 to 3°C
- Calm sea
- Cloudy
Thu
9PM - 5AM
19 March 2026
- SW 2–12 knots. Gusts up to 19 knots.
- 0 to 2°C
- Calm sea
- Cloudy
Fri
5AM - 9AM
20 March 2026
- SW 2–9 knots.
- 1°C
- Calm sea
- Cloudy
Fri
9AM - 1PM
20 March 2026
- W 5 knots increasing to 7 knots.
- Increasing from 2 to 7°C
- Calm sea
- Partly cloudy
Fri
1PM - 5PM
20 March 2026
- W 6–11 knots.
- 4 to 11°C
- Calm sea
- Partly cloudy
Fri
5PM - 9PM
20 March 2026
- W 3–11 knots backing S 3-11 knots. Gusts up to 18 knots.
- 2 to 10°C
- Calm sea
- Cloudy
Fri
9PM - 5AM
20 March 2026
- SW 3–11 knots. Gusts up to 20 knots.
- 1 to 5°C
- Calm sea
- Cloudy
Sat
5AM - 9AM
21 March 2026
- SW 6–11 knots. Gusts up to 23 knots.
- 3 to 8°C
- Calm sea
- Cloudy
Sat
9AM - 1PM
21 March 2026
- SW 10 knots decreasing to 5 knots. Gusts up to 24 knots.
- 6 to 11°C
- Chance of showers
Sat
1PM - 5PM
21 March 2026
- SW 3–7 knots backing S 3-7 knots.
- 5 to 13°C
- SW 0.4m at 2s period
- Chance of showers
Sat
5PM - 9PM
21 March 2026
- NW 5 knots increasing to SE 9 knots.
- 3 to 14°C
- NW 0.7m at 3s period
- Chance of showers
Sat
9PM - 5AM
21 March 2026
- NE 6–19 knots.
- 0 to 4°C
- NW 0.9m at 4s period
- Cloudy
Sun
5AM - 9AM
22 March 2026
- NE 10 knots increasing to 16 knots. Gusts up to 21 knots.
- Decreasing from 2 to 0°C
- NW 0.9m at 4s period
- Cloudy
Sun
9AM - 1PM
22 March 2026
- E 17 knots.
- 1°C
- Cloudy
Sun
1PM - 5PM
22 March 2026
- NE 16 knots increasing to 20 knots. Gusts up to 26 knots.
- −1 to 1°C
- N 0.7m at 4s period
- Chance of showers
Sun
5PM - 9PM
22 March 2026
- E 16–22 knots backing N 16-22 knots. Gusts up to 26 knots.
- 0°C
- N 0.7m at 3s period
- Chance of showers
Sun
9PM - 5AM
22 March 2026
- NE 24 knots decreasing to 20 knots. Gusts up to 31 knots.
- −3 to 0°C
- N 0.7m at 3s period
- Rain
Mon
5AM - 9AM
23 March 2026
- NE 22 knots decreasing to N 18 knots. Gusts up to 30 knots.
- Decreasing from −1 to −4°C
- N 0.9m at 4s period
- Chance of showers
Mon
9AM - 1PM
23 March 2026
- NE 18 knots.
- −2°C
- Chance of showers
Mon
1PM - 5PM
23 March 2026
- N 5–13 knots.
- −2 to 0°C
- N 0.4m at 3s period
- Cloudy
Mon
5PM - 9PM
23 March 2026
- NE 10 knots increasing to 12 knots.
- 0°C
- N 0.5m at 3s period
- Cloudy
Mon
9PM - 5AM
23 March 2026
- E 3–10 knots.
- −1°C
- N 0.4m at 3s period
- Cloudy
Tue
5AM - 9AM
24 March 2026
- E 9–11 knots.
- −2°C
- Calm sea
- Cloudy
Tue
9AM - 1PM
24 March 2026
- E 12 knots.
- −1°C
- Cloudy
Tue
1PM - 5PM
24 March 2026
- E 12 knots decreasing to 8 knots.
- Decreasing from 1 to −2°C
- Calm sea
- Cloudy
Tue
5PM - 9PM
24 March 2026
- NE 3–12 knots backing W 3-12 knots.
- Increasing from −2 to 1°C
- Calm sea
- Cloudy