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:
Klamath Rivermouth surfForecast / CAL – Del Norte County / USA
48hr Weather and Surf, issued 9 pm Thursday 11 Dec 2025 PSTForecast update in hr min s Forecast update imminent
Klamath Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Klamath Rivermouth sea temperature is
12.0° C
(Which is slightly warmer than usual)How big are the waves at Klamath Rivermouth today?
The current surf forecast for Klamath Rivermouth at 4AM is: 2.0m 14s primary swell from a West direction and 0.2m 13s secondary swell from a West-southwest direction (forecast issued at 09:00pm December 11). The wind direction is predicted to be offshore and the swell rating is 4.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 6ft (1.8m) | 13s |
| Afternoon (12 Dec) | 5.5ft (1.7m) | 13s |
| Evening (12 Dec) | 5ft (1.6m) | 12s |
Table - waves today at Klamath Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thu 11 | Friday 12 | Saturday 13 | Sunday 14 | |||||||||||||||||||||
| 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 | 4 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2284 | 2070 | 1807 | 1509 | 1288 | 1144 | 1011 | 980 | 694 | 669 | 472 | 390 | 377 | 297 | 350 | 555 | 485 | 472 | 369 | 344 | 345 | 332 | 302 | 290 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | off | off | cross- off | glass | glass | glass | off | off | cross- off | off | cross- off | glass | cross | glass | cross- off | cross- off | glass | cross- off | off | glass | cross- on | glass |
High Tide / height (m) | 5:54AM 2.45 | 5:57PM 1.90 | 6:35AM 2.49 | 7:21PM 1.84 | 7:13AM 2.52 | |||||||||||||||||||
Low Tide / height (m) | 10:58PM 0.82 | 12:26PM 1.17 | 11:46PM 1.04 | 1:29PM 0.98 | 12:35AM 1.22 | 2:20PM 0.80 | ||||||||||||||||||
Thu 11 | Friday 12 | Saturday 13 | Sunday 14 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 7:33 | - | - | - | - | - | - | - | 7:33 | - | - | - | - | - | - | - | 7:33 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:45 | - | - | - | - | - | - | - | 4:45 | - | - | - | - | - | - | - | 4:45 |
 | |  | |  |  |  | | | | | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 13 | 13 | 12 | 13 | 13 | 16 | 20 | 17 | 15 | 14 | 13 | 13 | 12 | 16 | 19 | 14 | 14 | 13 | 12 | 12 | 12 | 16 | 16 | 15 |
| Feels °C (?) | 11 | 11 | 9 | 10 | 10 | 13 | 18 | 15 | 13 | 11 | 10 | 10 | 8 | 13 | 16 | 13 | 11 | 10 | 10 | 9 | 9 | 14 | 14 | 13 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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