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:
Trespassers surfForecast / SA – Yorke Peninsula / Australia
48hr Weather and Surf, issued 3 am Wednesday 17 Dec 2025 ACDTForecast update in hr min s Forecast update imminent
Trespassers surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Trespassers sea temperature is
18.3° C
(Which is 1.1°C warmer than normal for this time of year)How big are the waves at Trespassers today?
The current surf forecast for Trespassers at 10AM is: 0.4m 15s primary swell from a Southwest direction and 0.4m 11s secondary swell from a Southwest direction (forecast issued at 03:30am December 17). The wind direction is predicted to be cross-offshore.
| Time (ACDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 1.5ft (0.4m) | 15s |
| Afternoon (17 Dec) | 1.5ft (0.4m) | 11s |
| Evening (17 Dec) | 1.5ft (0.4m) | 15s |
Table - waves today at Trespassers. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| 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 | 10 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 16 | 15 | 11 | 11 | 15 | 15 | 14 | 14 | 14 | 12 | 14 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 5 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 60 | 59 | 64 | 59 | 30 | 30 | 55 | 54 | 53 | 79 | 73 | 75 | 54 | 55 | 100 | 100 | 100 | 97 | 144 | 85 | 290 | 488 | 71 | 73 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | cross- off | cross- off | cross | glass | cross- off | cross- off | off | off | cross- off | cross | cross | cross- on | cross- on | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross |
High Tide / height (m) | 4:01AM 0.02 | 4:14AM 0.02 | 2:04PM 0.01 | 4:39AM 0.02 | 3:03PM 0.01 | |||||||||||||||||||
Low Tide / height (m) | 7:42PM 0.00 | 1:17PM 0.01 | 8:22PM 0.00 | 12:47PM 0.01 | 8:58PM 0.00 | |||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| Sunrise | - | - | 6:01 | - | - | - | - | - | - | - | 6:01 | - | - | - | - | - | - | - | 6:03 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 8:32 | - | - | - | - | - | - | - | 8:32 | - | - | - | - | - | - | - | 8:34 | - |
 | |  | | | | | | | | | | | | | | | |  |  | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 20 | 21 | 23 | 26 | 28 | 29 | 29 | 27 | 25 | 26 | 27 | 30 | 33 | 29 | 29 | 25 | 21 | 19 | 20 | 19 | 19 | 17 | 17 | 15 |
| Feels °C (?) | 17 | 18 | 19 | 21 | 25 | 27 | 26 | 23 | 21 | 22 | 23 | 26 | 30 | 26 | 25 | 22 | 19 | 17 | 17 | 15 | 14 | 12 | 12 | 11 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Vancouver Island’s Day Of Days With Reed Platenius
Surf-Forecast recently helped the 21-year-old Canadian pro surfer and adventurer score some cold water perfection at home.
Read more
Discover more articles and updates in the Greenroom.
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Trespassers surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest