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 6 pm Saturday 13 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
20.3° C
(Which is 4.8°C warmer than normal for this time of year)How big are the waves at Ruby Bay today?
The current surf forecast for Ruby Bay at 8PM is: 0.2m 14s primary swell from a North direction and 0.1m 12s secondary swell from a North direction, 0.2m 3s secondary swell from a East-northeast direction (forecast issued at 06:00pm December 13). The wind direction is predicted to be glassy.
| Time (NZDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | - | - |
| Afternoon (13 Dec) | 0.5ft (0.2m) | 15s |
| Evening (13 Dec) | 0.5ft (0.2m) | 14s |
Table - waves today at Ruby Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | 10 AM | 1 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 4 | 4 | 4 | 4 | 5 | 4 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 4 | 4 | 8 | 18 | 14 | 17 | 11 | 32 | 71 | 110 | 132 | 137 | 176 | 248 | 338 | 585 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | on | glass | glass | glass | glass | on | on | on | on | glass | glass | glass | glass | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- off |
High Tide / height (m) | 5:50PM 3.42 | 6:11AM 3.34 | 6:50PM 3.41 | 7:09AM 3.34 | 7:45PM 3.44 | 8:11AM 3.40 | ||||||||||||||||||
Low Tide / height (m) | 12:02AM 1.52 | 12:20PM 1.58 | 1:00AM 1.53 | 1:23PM 1.55 | 1:50AM 1.49 | |||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 5:48 | - | - | - | - | - | - | - | 5:48 | - | - | - | - | - | - | - | 5:48 | - | - |
| Sunset | - | 8:53 | - | - | - | - | - | - | - | 8:54 | - | - | - | - | - | - | - | 8:55 | - | - | - | - | - | - |
 | |  | | | | |  | | |  |  | | | | | | | | | |  |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 6 | 8 |
| Temp. °C | 18 | 17 | 14 | 12 | 12 | 12 | 17 | 18 | 19 | 18 | 14 | 13 | 12 | 12 | 18 | 22 | 22 | 20 | 16 | 16 | 17 | 17 | 18 | 17 |
| Feels °C (?) | 16 | 16 | 13 | 11 | 11 | 11 | 16 | 16 | 17 | 17 | 14 | 12 | 11 | 11 | 17 | 18 | 17 | 17 | 14 | 15 | 16 | 15 | 16 | 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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