Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:
Cow Bay surfForecast / Nova Scotia / Canada
48hr Weather and Surf, issued 7 am Thursday 11 Dec 2025 ASTForecast update in hr min s Forecast update imminent
Cow Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cow Bay sea temperature is
6.1° C
(Which is slightly warmer than usual)How big are the waves at Cow Bay today?
The current surf forecast for Cow Bay at 10AM is: 2.5m 9s primary swell from a South direction and 0.1m 13s secondary swell from a East direction, 2.5m 8s secondary swell from a South direction (forecast issued at 07:00am December 11). The wind direction is predicted to be cross-shore.
| Time (AST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Dec) | 8ft (2.5m) | 8s |
| Afternoon (11 Dec) | 8ft (2.4m) | 9s |
| Evening (11 Dec) | - | - |
Table - waves today at Cow Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 11 | Friday 12 | Saturday 13 | Sun 14 | |||||||||||||||||||||
| 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 7 | 8 | 9 | 9 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 9 | 11 | 11 | 10 | 6 | 10 | 10 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 530 | 776 | 906 | 901 | 1209 | 0 | 0 | 0 | 0 | 31 | 19 | 0 | 0 | 0 | 28 | 25 | 22 | 48 | 45 | 37 | 92 | 49 | 46 | 41 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross | cross | cross | cross | cross | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross- on | cross- on |
High Tide / height (m) | 12:58PM 1.41 | 1:50AM 1.46 | 2:02PM 1.33 | 2:45AM 1.45 | 3:06PM 1.29 | |||||||||||||||||||
Low Tide / height (m) | 7:23AM 0.46 | 7:42PM 0.32 | 8:23AM 0.48 | 8:35PM 0.41 | 9:24AM 0.48 | 9:29PM 0.47 | ||||||||||||||||||
Thursday 11 | Friday 12 | Saturday 13 | Sun 14 | |||||||||||||||||||||
| Sunrise | - | 7:39 | - | - | - | - | - | - | - | 7:39 | - | - | - | - | - | - | - | 7:41 | - | - | - | - | - | - |
| Sunset | - | - | - | 4:32 | - | - | - | - | - | - | - | 4:32 | - | - | - | - | - | - | - | 4:32 | - | - | - | - |
 |  |  |  |  | | |  | |  | | | | | | | |  | | | | | | | |
Rain (mm) | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 9 | 9 | 7 | 7 | 4 | 1 | 0 | -2 | -3 | -3 | -3 | -2 | -2 | -2 | -2 | -2 | -2 | -2 | -1 | 1 | 1 | 2 | 3 | 3 |
| Feels °C (?) | 2 | 3 | 0 | 0 | -5 | -9 | -11 | -13 | -14 | -14 | -14 | -13 | -13 | -12 | -11 | -11 | -10 | -9 | -9 | -6 | -5 | -3 | -2 | -2 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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