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:
Ruby Bay surfForecast / Nelson – Tasman Bay / New Zealand
48hr Weather and Surf, issued 12 am Wednesday 17 Dec 2025 NZDTForecast update in hr min s Forecast update imminent
Ruby Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Ruby Bay sea temperature is
19.6° C
(Which is 3.9°C warmer than normal for this time of year)| Time (NZDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | - | - |
| Afternoon (17 Dec) | - | - |
| Evening (17 Dec) | 2ft (0.6m) | 4s |
Table - waves today at Ruby Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| 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 | 10 AM | 1 PM | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 7 | 16 | 16 | 16 | 16 | 7 | 15 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 3 | 13 | 12 | 12 | 12 | 12 | 16 | 5 | 5 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 0 | 0 | 0 | 0 | 0 | 14 | 0 | 9 | 7 | 10 | 10 | 7 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 3 | 5 | 23 | 58 | 62 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | cross- off | on | on | glass | glass | glass | off | off | cross- on | on | glass | off | off | off | off | off | cross | cross | cross- off |
High Tide / height (m) | 8:33PM 3.47 | 9:09AM 3.53 | 9:18PM 3.50 | 9:58AM 3.70 | 10:00PM 3.53 | 10:38AM 3.84 | ||||||||||||||||||
Low Tide / height (m) | 2:34AM 1.43 | 3:01PM 1.44 | 3:15AM 1.37 | 3:42PM 1.37 | 3:55AM 1.31 | 4:18PM 1.30 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:48 | - | - | - | - | - | - | - | 5:48 | - | - | - | - | - | - | - | 5:48 | - | - | - | - |
| Sunset | - | - | - | - | - | - | - | 8:57 | - | - | - | - | - | - | - | 8:58 | - | - | - | - | - | - | - | 8:58 |
 |  |  |  |  |  | |  | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 10 | 10 | 10 | 15 | 19 | 16 | 15 | 13 | 13 | 11 | 11 | 17 | 19 | 18 | 18 | 16 | 15 | 14 | 14 | 17 | 20 | 21 | 17 |
| Feels °C (?) | 9 | 7 | 7 | 6 | 11 | 15 | 12 | 13 | 12 | 13 | 10 | 9 | 15 | 16 | 15 | 17 | 14 | 13 | 12 | 12 | 15 | 18 | 19 | 17 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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