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:
Backsides surfForecast / NSW – North Coast / Australia
48hr Weather and Surf, issued 10 pm Sunday 14 Dec 2025 AEDTForecast update in hr min s Forecast update imminent
Backsides surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Backsides sea temperature is
24.5° C
(Which is normal for this time of year)How big are the waves at Backsides today?
The current surf forecast for Backsides at 2AM is: 0.8m 8s primary swell from a East-southeast direction and 0.8m 6s secondary swell from a Northeast direction (forecast issued at 10:00pm December 14). An open ocean swell of 0.9m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (AEDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 2.5ft (0.8m) | 8s |
| Afternoon (15 Dec) | 2.5ft (0.8m) | 8s |
| Evening (15 Dec) | 6ft (1.8m) | 7s |
Table - waves today at Backsides. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sun 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| 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 | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 9 | 9 | 8 | 6 | 8 | 8 | 8 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 106 | 103 | 92 | 101 | 80 | 80 | 80 | 146 | 270 | 311 | 308 | 392 | 394 | 431 | 476 | 444 | 470 | 444 | 405 | 395 | 376 | 334 | 297 | 259 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- off | cross- off | off | cross | cross | cross | cross | cross | cross- on | cross- on | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 6:11AM 1.18 | 5:40PM 0.96 | 6:54AM 1.30 | 6:30PM 0.95 | 7:33AM 1.41 | |||||||||||||||||||
Low Tide / height (m) | 11:12PM 0.24 | 12:17PM 0.52 | 11:51PM 0.24 | 1:15PM 0.51 | 12:29AM 0.24 | 2:05PM 0.48 | ||||||||||||||||||
Sun 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:41 | - | - | - | - | - | - | - | 5:41 | - | - | - | - | - | - | - | 5:41 | - | - | - |
| Sunset | - | - | - | - | - | - | - | 7:38 | - | - | - | - | - | - | - | 7:39 | - | - | - | - | - | - | - | 7:39 |
 | | | |  |  | | |  |  | |  |  |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | - | 1 | 1 | - | 1 | 1 | - | - | - | - | - | - |
| Temp. °C | 25 | 24 | 22 | 22 | 24 | 24 | 25 | 24 | 23 | 22 | 22 | 22 | 22 | 21 | 21 | 22 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 |
| Feels °C (?) | 24 | 23 | 22 | 24 | 26 | 23 | 24 | 23 | 22 | 20 | 20 | 21 | 20 | 18 | 19 | 20 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 |
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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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