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 1 am Monday 15 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
5.5° C
(Which is slightly warmer than usual)How big are the waves at Cow Bay today?
The current surf forecast for Cow Bay at 6AM is: 1.3m 12s primary swell from a South direction (forecast issued at 01:00am December 15). An open ocean swell of 0.4m 7s is not directed at the surf break, a second open ocean swell of 1.1m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (AST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 6.5ft (2.0m) | 11s |
| Afternoon (15 Dec) | 6ft (1.9m) | 11s |
| Evening (15 Dec) | 4.5ft (1.4m) | 10s |
Table - waves today at Cow Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| 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 | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 9 | 10 | 11 | 11 | 11 | 10 | 5 | 5 | 10 | 10 | 10 | 10 | 19 | 16 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 43 | 14 | 284 | 882 | 1049 | 915 | 627 | 452 | 339 | 107 | 68 | 57 | 66 | 68 | 66 | 42 | 41 | 103 | 16 | 16 | 15 | 16 | 7 | 5 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | cross- off | 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 | cross | cross- on | cross | cross- on | cross |
High Tide / height (m) | 4:21AM 1.48 | 4:55PM 1.30 | 5:04AM 1.51 | 5:41PM 1.34 | 5:46AM 1.55 | 6:25PM 1.38 | ||||||||||||||||||
Low Tide / height (m) | 10:22PM 0.52 | 11:14AM 0.42 | 11:13PM 0.54 | 12:02PM 0.37 | 12:01AM 0.54 | 12:46PM 0.33 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| Sunrise | - | - | - | 7:43 | - | - | - | - | - | - | - | 7:43 | - | - | - | - | - | - | - | 7:43 | - | - | - | - |
| Sunset | - | - | - | - | - | 4:34 | - | - | - | - | - | - | - | 4:34 | - | - | - | - | - | - | - | 4:34 | - | - |
 | | |  |  | |  | | | |  | | | | | |  | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | -2 | -2 | -2 | -3 | -4 | -5 | -6 | -7 | -7 | -7 | -8 | -7 | -5 | -2 | -2 | -1 | 1 | 3 | 4 | 5 | 5 | 6 | 6 | 7 |
| Feels °C (?) | -10 | -11 | -10 | -12 | -13 | -15 | -16 | -16 | -16 | -15 | -16 | -15 | -13 | -10 | -8 | -7 | -5 | -5 | -4 | -3 | -4 | -3 | -3 | -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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