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Surf Forecasts:
Waimea Rivermouth surfForecast / HAW – Kaua'i / USA
48hr Weather and Surf, issued 7 am Tuesday 09 Dec 2025 HSTForecast update in hr min s Forecast update imminent
Waimea Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Waimea Rivermouth sea temperature is
25.8° C
(Which is slightly warmer than usual)How big are the waves at Waimea Rivermouth today?
The current surf forecast for Waimea Rivermouth at 2PM is: 0.4m 6s primary swell from a Southeast direction (forecast issued at 07:00am December 09). An open ocean swell of 1.6m 13s is not directed at the surf break, a second open ocean swell of 0.4m 10s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (09 Dec) | 2.5ft (0.7m) | 8s |
| Afternoon (09 Dec) | 1.5ft (0.4m) | 6s |
| Evening (09 Dec) | 1.5ft (0.4m) | 12s |
Table - waves today at Waimea Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 09 | Wednesday 10 | Thursday 11 | Fri 12 | |||||||||||||||||||||
| 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 6 | 6 | 13 | 12 | 12 | 12 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 74 | 57 | 10 | 10 | 0 | 36 | 35 | 34 | 51 | 51 | 51 | 51 | 84 | 74 | 71 | 71 | 71 | 71 | 69 | 96 | 60 | 59 | 59 | 58 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | glass | cross- on | cross | glass | glass | glass | cross- off | cross- off | cross- on | cross- on | cross- on | cross | cross | cross- off | off | off | cross- off | cross | cross- off | off | glass | glass |
High Tide / height (m) | 7:36AM 0.54 | 8:04PM 0.16 | 8:23AM 0.48 | 9:51PM 0.20 | 9:08AM 0.41 | 11:29PM 0.27 | ||||||||||||||||||
Low Tide / height (m) | 3:47PM 0.09 | 12:35AM 0.09 | 4:25PM 0.08 | 1:57AM 0.17 | 4:57PM 0.06 | |||||||||||||||||||
Tuesday 09 | Wednesday 10 | Thursday 11 | Fri 12 | |||||||||||||||||||||
| Sunrise | - | 7:05 | - | - | - | - | - | - | - | 7:05 | - | - | - | - | - | - | - | 7:07 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 5:54 | - | - | - | - | - | - | - | 5:55 | - | - | - | - | - | - | - | 5:55 | - | - | - |
 |  |  | | |  |  | | | | | | | | |  | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - |
| Temp. °C | 22 | 23 | 25 | 25 | 24 | 24 | 23 | 23 | 22 | 22 | 24 | 25 | 24 | 23 | 23 | 22 | 22 | 22 | 24 | 24 | 23 | 22 | 22 | 22 |
| Feels °C (?) | 23 | 25 | 27 | 27 | 26 | 26 | 26 | 25 | 23 | 23 | 24 | 25 | 24 | 23 | 24 | 23 | 22 | 22 | 25 | 25 | 23 | 23 | 23 | 23 |
- 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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