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Waimea Rivermouth Surf Forecast
/ HAW – Kaua'i (25 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Waimea Rivermouth surfForecast / HAW – Kaua'i / USA
12 Day Weather and Surf, issued 1 am Friday 19 Sep 2025 HST
Best Forecast Surf Conditions for Waimea Rivermouth this week:
The surf forecast for Waimea Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 19) at 8AM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 0.6m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Waimea Rivermouth in the next 12 days are 0.9m 16s and forecast to arrive on Saturday (Sep 20) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Sunday (Sep 21) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Fri 19th Sep) | 4.5ft (1.3m) 6s |
| Best Surf | 8AM (Fri 19th Sep) | 4.5ft (1.3m) 6s |
| Most Powerful | 2PM (Sat 20th Sep) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Waimea Rivermouth over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 28°C on Fri morning, min 25°C on Fri night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 6 | 18 | 17 | 16 | 16 | 15 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 7 | 11 | 11 | 6 | 8 | 8 | 9 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 94 | 103 | 229 | 341 | 348 | 305 | 289 | 204 | 181 | 129 | 85 | 83 | 77 | 45 | 126 | 40 | 41 | 84 | 31 | 53 | 36 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | cross- off | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | glass | cross- off |
High Tide / height (m) | 2:46PM 0.53 | 3:00AM 0.37 | 3:13PM 0.50 | 3:35AM 0.41 | 3:37PM 0.45 | 4:10AM 0.45 | 3:58PM 0.41 | 4:44AM 0.47 | 4:16PM 0.36 | 5:18AM 0.48 | 4:30PM 0.31 | 5:56AM 0.48 | 4:37PM 0.27 | ||||||||
Low Tide / height (m) | 8:03AM 0.06 | 9:21PM 0.09 | 8:46AM 0.07 | 9:36PM 0.08 | 9:28AM 0.10 | 9:52PM 0.07 | 10:08AM 0.13 | 10:09PM 0.05 | 10:49AM 0.16 | 10:26PM 0.05 | 11:34AM 0.19 | 10:45PM 0.05 | 12:27PM 0.22 | 11:04PM 0.06 | |||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | |||||||||||||||
| Sunrise | 6:26 | - | - | 6:26 | - | - | 6:26 | - | - | 6:26 | - | - | 6:26 | - | - | 6:26 | - | - | 6:28 | - | - |
| Sunset | - | 6:37 | - | - | 6:37 | - | - | 6:36 | - | - | 6:35 | - | - | 6:34 | - | - | 6:32 | - | - | 6:31 | - |
 |  |  | | | | | | | | |  | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 28 | 28 | 27 | 27 | 28 | 26 | 27 | 28 | 26 | 27 | 28 | 26 | 28 | 28 | 25 | 27 | 28 | 26 | 27 | 27 | 26 |
| Feels °C (?) | 30 | 29 | 29 | 29 | 29 | 27 | 28 | 29 | 28 | 28 | 29 | 28 | 29 | 29 | 23 | 28 | 28 | 27 | 29 | 28 | 28 |
- 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)
Recent Eyeball Surf Reports for HAW - Kaua'i
Continuing clean conditions at Waimea Rivermouth (light winds from the ENE at Barking Sands/Kauai Airport 16 km from Waimea Rivermouth). A 0.8m swell from the SE
16 km away, 2 h 27 min ago
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 Waimea Rivermouth 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.
Information about the Waimea Rivermouth Surf forecast
The above surf forecast table for Waimea Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Waimea Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Waimea Rivermouth surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Waimea Rivermouth) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Waimea Rivermouth may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a vacation in Kaua'i? If you are looking for accommodation near Waimea Rivermouth, camping, hotels and condos and appartments in Kaua'i, consider staying in Nawiliwili which is 32 km (20 miles) away. Alternatively, find information about places to stay and car hire in Lihue - Kauai which is 34 km (21 miles) away
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