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:
Onemana surfForecast / Coromandel / New Zealand
48hr Weather and Surf, issued 12 pm Saturday 13 Dec 2025 NZDTForecast update in hr min s Forecast update imminent
Onemana surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Onemana sea temperature is
21.2° C
(Which is 3.0°C warmer than normal for this time of year)How big are the waves at Onemana today?
The current surf forecast for Onemana at 3PM is: 0.9m 6s primary swell from a East direction and 0.4m 8s secondary swell from a Northeast direction (forecast issued at 12:00pm December 13). The wind direction is predicted to be onshore.
| Time (NZDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 3.5ft (1.0m) | 6s |
| Afternoon (13 Dec) | 3ft (0.9m) | 6s |
| Evening (13 Dec) | 2.5ft (0.8m) | 8s |
Table - waves today at Onemana. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 7 | 7 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 71 | 69 | 60 | 50 | 84 | 137 | 159 | 90 | 70 | 64 | 68 | 51 | 50 | 51 | 72 | 94 | 104 | 107 | 66 | 70 | 122 | 122 | 133 | 130 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | on | on | cross | cross | cross | cross- off | glass | cross- on | cross- on | cross- on | cross- on | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross- off | cross |
High Tide / height (m) | 2:27PM 1.68 | 3:02AM 1.54 | 3:19PM 1.61 | 3:58AM 1.52 | 4:09PM 1.57 | 4:50AM 1.53 | ||||||||||||||||||
Low Tide / height (m) | 8:10AM 0.36 | 8:49PM 0.32 | 9:04AM 0.44 | 9:40PM 0.35 | 9:58AM 0.49 | 10:29PM 0.37 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:50 | - | - | - | - | - | - | - | 5:50 | - | - | - | - | - | - | - | 5:50 |
| Sunset | - | - | - | 8:30 | - | - | - | - | - | - | - | 8:30 | - | - | - | - | - | - | - | 8:31 | - | - | - | - |
 | | | |  |  | | | | | |  | |  | | |  | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 18 | 20 | 19 | 16 | 16 | 15 | 15 | 18 | 19 | 19 | 18 | 16 | 16 | 16 | 16 | 18 | 20 | 20 | 19 | 17 | 16 | 16 | 17 |
| Feels °C (?) | 13 | 15 | 17 | 16 | 13 | 14 | 14 | 15 | 17 | 17 | 17 | 16 | 15 | 15 | 15 | 14 | 15 | 17 | 18 | 18 | 16 | 14 | 15 | 15 |
- 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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