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:

The current surf forecast for Riversdale at 7PM is: 2.3m 8s primary swell from a South-southwest direction and 0.4m 8s secondary swell from a Northeast direction, 0.2m 16s secondary swell from a South-southwest direction (forecast issued at 12:00pm December 17). The wind direction is predicted to be cross-offshore.
| Time (NZDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 2.5ft (0.7m) | 8s |
| Afternoon (17 Dec) | 6ft (1.8m) | 7s |
| Evening (17 Dec) | 8ft (2.5m) | 9s |
Table - waves today at Riversdale. (Swell directed towards the surf break)
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| 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 (?) | NE | SW | SSW | SSW | SSW | SSW | SSW | SSW | S | S | S | S | S | S | S | S | S | S | SE | SE | ENE | ENE | ENE | SSW |
| Period(s) (?) | 8 | 7 | 7 | 8 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 10 | 10 | 8 | 8 | 8 | 9 |
Wave (?)Graph | ||||||||||||||||||||||||
| 48 | 228 | 362 | 755 | 1474 | 2199 | 1346 | 928 | 487 | 373 | 320 | 273 | 228 | 160 | 122 | 69 | 50 | 32 | 25 | 37 | 37 | 37 | 37 | 579 | |
Wind (km/h) | WSW | WSW | WSW | SW | WSW | W | W | WNW | W | SSE | ESE | ENE | N | NW | NW | NW | NW | NW | WNW | NW | NW | WSW | SW | SW |
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | glass | cross- on | on | cross- on | glass | cross- off | cross- off | cross- off | off | off | off | off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 4:12PM 1.26 | 4:37AM 1.35 | 4:58PM 1.26 | 5:22AM 1.37 | 5:43PM 1.26 | 6:06AM 1.40 | ||||||||||||||||||
Low Tide / height (m) | 10:08AM 0.31 | 10:20PM 0.29 | 10:55AM 0.31 | 11:04PM 0.30 | 11:41AM 0.30 | 11:49PM 0.29 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:37 |
| Sunset | - | - | - | 8:45 | - | - | - | - | - | - | - | 8:45 | - | - | - | - | - | - | - | 8:45 | - | - | - | - |
Rain (mm) | 1 | 1 | 2 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 2 |
| Temp. °C | 12 | 14 | 12 | 12 | 11 | 11 | 10 | 11 | 16 | 17 | 17 | 16 | 14 | 14 | 16 | 16 | 19 | 21 | 19 | 18 | 17 | 15 | 11 | 11 |
| Feels °C (?) | 8 | 8 | 6 | 6 | 6 | 7 | 7 | 9 | 14 | 15 | 15 | 14 | 13 | 11 | 12 | 14 | 17 | 18 | 12 | 13 | 13 | 11 | 6 | 7 |

70-foot plus waves predicted for Portuguese big wave tow surfing competition.

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