Surf Forecasts:
Waimea Rivermouth surf forecast from 14 Aug 2026:
- Best quality surf: Sunday 16 Aug, 2AM (local time) - 10ft (3.0m), 10s period, E swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 5AM (local time) - 10ft (3.0m), 10s period, E swell with 1,697 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 8PM (local time) - 4ft (1.2m), 15s period with S swell.
Best Forecast Surf Conditions for Waimea Rivermouth this week:
The surf forecast for Waimea Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 13) at 8PM. The primary swell is predicted to be 1.2m and 15s period with a secondary swell of 1.3m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Waimea Rivermouth in the next 16 days are 3.0m 10s and forecast to arrive on Sunday (Aug 16) at 5AM. 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 Tuesday (Aug 18) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 13th Aug) | 4ft (1.2m) 15s |
| Best Surf | 2AM (Sun 16th Aug) | 10ft (3.0m) 10s |
| Most Powerful | 5AM (Sun 16th Aug) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Waimea Rivermouth over the next 16 days.
Short Range ForecastLight rain (total 5mm), mostly falling on Sun morning. Warm (max 28°C on Thu afternoon, min 25°C on Thu night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 32mm), heaviest during Sun afternoon. Warm (max 27°C on Mon afternoon, min 24°C on Tue night). Winds decreasing (fresh winds from the E on Sun afternoon, light winds from the E by Wed morning). | |||||||||||||||||||
Thu 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | S 15 | S 15 | S 15 | S 14 | S 14 | E 9 | E 9 | E 10 | ESE 11 | SE 10 | S 13 | S 14 | E 7 | S 14 | S 13 | S 13 | S 13 | E 6 | S 12 | S 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 794 | 623 | 510 | 411 | 394 | 641 | 979 | 1552 | 151 | 200 | 165 | 264 | 377 | 246 | 165 | 121 | 114 | 95 | 44 | 44 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | cross-off | glassy | cross-off |
High Tide | 4:42PM0.59m | 4:51AM0.34m | 5:12PM0.53m | 5:42AM0.37m | 5:39PM0.46m | 6:35AM0.39m | 6:00PM0.39m | 7:34AM0.41m | 6:14PM0.32m | 8:43AM0.42m | 5:44PM0.27m | 10:05AM0.43m | ||||||||
Low Tide | 11:24PM0.09m | 10:32AM0.05m | 11:48PM0.08m | 11:20AM0.12m | 00:12AM0.07m | 12:13PM0.19m | 00:37AM0.07m | 1:23PM0.25m | 1:04AM0.07m | 4:02PM0.29m | 1:38AM0.08m | 2:26AM0.09m | ||||||||
 |  | | | | | |  |  |  |  | | | |  | | | | | | |
 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 7:10 | — | — | 7:09 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — |
mm | — | — | — | — | — | — | — | — | 5 | 18 | 8 | 4 | 2 | — | — | — | — | — | — | — |
Temp °C | 28 | 26 | 27 | 28 | 26 | 27 | 28 | 27 | 27 | 26 | 26 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 26 | 26 | 26 | 27 | 28 | 26 | 27 | 27 | 26 | 27 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | S 15 | S 15 | S 15 | S 14 | S 14 | S 13 | NE 7 | NNE 6 | ESE 11 | SE 10 | NE 7 | S 14 | SE 6 | S 14 | S 13 | S 13 | S 13 | NE 7 | NNE 7 | NNE 6 |
| kJ | 794 | 623 | 510 | 411 | 394 | 280 | 65 | 41 | 151 | 200 | 104 | 264 | 34 | 246 | 165 | 121 | 114 | 25 | 31 | 28 |
Swell 2 Height (m) Direction Period (s) | NNE 4 | NNE 6 | NE 6 | NNE 7 | NE 6 | NE 7 | S 13 | ESE 11 | S 12 | S 13 | S 13 | SE 7 | S 12 | SSW 6 | NE 6 | SE 6 | NNE 6 | S 12 | SE 9 | SE 9 |
| kJ | 8 | 18 | 27 | 29 | 31 | 44 | 222 | 149 | 148 | 114 | 165 | 53 | 148 | 11 | 19 | 19 | 13 | 69 | 40 | 40 |
Swell 3 Height (m) Direction Period (s) | SE 9 | ESE 7 | SE 9 | ESE 9 | SE 8 | ESE 8 | ESE 11 | S 13 | S 17 | S 16 | S 16 | NE 7 | NE 7 | WNW 11 | SE 6 | NNE 6 | SE 5 | SE 9 | S 12 | S 12 |
| kJ | 19 | 10 | 20 | 31 | 14 | 28 | 66 | 219 | 145 | 183 | 125 | 49 | 37 | 23 | 12 | 13 | 9 | 38 | 44 | 44 |
Wind waves Height (m) Direction Period (s) | E 6 | E 7 | E 8 | E 8 | E 8 | E 9 | E 9 | E 10 | NNE 7 | NNE 6 | SE 8 | E 3 | E 7 | ENE 6 | E 6 | E 6 | E 6 | E 6 | E 5 | ENE 6 |
| kJ | 141 | 216 | 336 | 364 | 368 | 641 | 979 | 1552 | 76 | 69 | 112 | 2 | 377 | 41 | 160 | 239 | 144 | 95 | 68 | 97 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 15 | 165 | 156 | 156 | 156 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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 16 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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