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:
Sewers surfForecast / CAL – San Luis Obispo / USA
48hr Weather and Surf, issued 9 am Monday 15 Dec 2025 PSTForecast update in hr min s Forecast update imminent
Sewers surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Sewers sea temperature is
15.7° C
(Which is 1.6°C warmer than normal for this time of year)How big are the waves at Sewers today?
The current surf forecast for Sewers at 2PM is: 0.5m 10s primary swell from a West direction and 0.4m 4s secondary swell from a West-northwest direction (forecast issued at 09:00am December 15). An open ocean swell of 0.4m 13s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 1.5ft (0.4m) | 13s |
| Afternoon (15 Dec) | 1.5ft (0.5m) | 9s |
| Evening (15 Dec) | 1.5ft (0.5m) | 9s |
Table - waves today at Sewers. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| 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 | 1 AM | 4 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 10 | 9 | 5 | 9 | 9 | 8 | 8 | 10 | 10 | 12 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 63 | 63 | 48 | 44 | 60 | 27 | 39 | 22 | 68 | 94 | 232 | 965 | 1376 | 1139 | 1086 | 890 | 876 | 841 | 841 | 1082 | 497 | 827 | 639 | 639 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross- off | cross- off | cross- off | off | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 6:28AM 0.73 | 8:04PM 0.17 | 6:55AM 0.81 | 9:00PM 0.19 | 7:19AM 0.89 | 9:46PM 0.20 | ||||||||||||||||||
Low Tide / height (m) | 1:41PM -0.73 | 12:33AM -0.15 | 2:19PM -0.90 | 1:03AM -0.06 | 2:54PM -1.03 | 1:27AM -0.00 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| Sunrise | - | 7:03 | - | - | - | - | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:03 | - | - | - | - | - | - |
| Sunset | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - |
 |  | | | | | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 13 | 17 | 22 | 21 | 17 | 16 | 16 | 16 | 15 | 19 | 23 | 22 | 18 | 18 | 17 | 17 | 16 | 19 | 21 | 21 | 19 | 17 | 15 | 14 |
| Feels °C (?) | 10 | 14 | 18 | 16 | 12 | 11 | 11 | 11 | 10 | 14 | 18 | 18 | 14 | 14 | 14 | 14 | 13 | 16 | 18 | 19 | 17 | 16 | 14 | 12 |
- 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 Sewers 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