Surf Forecasts:
Waimea Rivermouth surf forecast from 20 Sep 2026:
- Best quality surf: Sunday 20 Sep, 11AM (local time) - 6ft (1.8m), 8s period, E swell with cross-offshore winds.
- Most powerful swell: Saturday 26 Sep, 11PM (local time) - 7.5ft (2.3m), 8s period, E swell with 716 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 11AM (local time) - 6ft (1.8m), 8s period with E 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 Sunday (Sep 20) at 11AM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 0.9m and 16s. 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 2.3m 8s and forecast to arrive on Saturday (Sep 26) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 16s period and expected on Saturday (Sep 26) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Sun 20th Sep) | 6ft (1.8m) 8s |
| Best Surf | 11AM (Sun 20th Sep) | 6ft (1.8m) 8s |
| Most Powerful | 11PM (Sat 26th Sep) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Waimea Rivermouth over the next 16 days.
Short Range ForecastMostly dry. Warm (max 28°C on Sun morning, min 24°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Wed morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | |||||||||||||||
AM | 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) | SSW 16 | SSW 15 | SSW 15 | E 8 | E 8 | SSW 13 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 9 | E 9 | SW 17 | SW 16 | E 8 | E 8 | E 8 | E 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 407 | 365 | 355 | 377 | 308 | 232 | 257 | 228 | 195 | 313 | 425 | 332 | 257 | 297 | 291 | 258 | 398 | 408 | 624 | 699 | 655 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | off | cross-off | glassy | cross | cross-off | glassy | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 12:34PM0.47m | 00:47AM0.20m | 1:13PM0.49m | 1:22AM0.24m | 1:46PM0.50m | 1:55AM0.29m | 2:14PM0.50m | 2:28AM0.34m | 2:40PM0.49m | 3:02AM0.40m | 3:05PM0.47m | 3:39AM0.45m | 3:30PM0.43m | 4:18AM0.50m | |||||||
Low Tide | 8:25PM0.15m | 5:48AM0.12m | 8:30PM0.14m | 6:42AM0.10m | 8:39PM0.12m | 7:27AM0.08m | 8:51PM0.10m | 8:11AM0.08m | 9:07PM0.08m | 8:54AM0.09m | 9:24PM0.06m | 9:39AM0.11m | 9:45PM0.04m | ||||||||
 |  |  | | | | | | | | |  | | | | | | | | | | |
 | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — |
 | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 26 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 25 | 26 | 27 | 26 |
Feels °C | 29 | 29 | 27 | 28 | 28 | 26 | 30 | 30 | 29 | 30 | 30 | 28 | 29 | 29 | 28 | 28 | 28 | 25 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | S 13 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | S 12 | SSW 15 | SSW 17 | SW 17 | SW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 |
| kJ | 406 | 365 | 355 | 336 | 308 | 232 | 219 | 126 | 110 | 77 | 75 | 69 | 152 | 261 | 291 | 258 | 160 | 261 | 386 | 295 | 284 |
Swell 2 Height (m) Direction Period (s) | NNE 7 | E 7 | ENE 6 | ENE 6 | ESE 8 | N 13 | NNW 12 | S 13 | S 12 | S 12 | S 12 | NNW 9 | NNW 10 | N 10 | N 9 | NNW 9 | NE 7 | NE 6 | SE 9 | SE 8 | WNW 15 |
| kJ | 29 | 56 | 41 | 39 | 33 | 87 | 145 | 156 | 106 | 106 | 106 | 47 | 74 | 47 | 42 | 26 | 27 | 24 | 62 | 74 | 272 |
Swell 3 Height (m) Direction Period (s) | SE 8 | N 11 | NNW 10 | NNW 10 | NNE 6 | NE 6 | NE 8 | ESE 7 | NE 5 | SW 17 | SSW 16 | SSW 16 | S 12 | S 12 | S 12 | NE 5 | SE 7 | WNW 18 | NE 6 | NE 7 | NE 7 |
| kJ | 40 | 9 | 11 | 10 | 12 | 15 | 30 | 18 | 14 | 75 | 99 | 97 | 71 | 68 | 41 | 7 | 25 | 123 | 34 | 44 | 37 |
Wind waves Height (m) Direction Period (s) | E 8 | E 6 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 9 | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 |
| kJ | 407 | 290 | 348 | 377 | 305 | 213 | 257 | 228 | 195 | 313 | 425 | 332 | 257 | 297 | 223 | 240 | 398 | 408 | 624 | 699 | 655 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 15 | 6 | 330 | 156 |
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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