Surf Forecasts:
Rivermouth_Wailuku surf forecast from 4 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 8AM (local time) - 4.5ft (1.4m), 11s period, ENE swell with glassy winds.
- Most powerful swell: Monday 3 Aug, 11PM (local time) - 4.5ft (1.4m), 12s period, ENE swell with 541 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 8AM (local time) - 4.5ft (1.4m), 11s period with ENE swell.
Best Forecast Surf Conditions for Rivermouth_Wailuku this week:
The surf forecast for Rivermouth_Wailuku over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 04) at 8AM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 0.2m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rivermouth_Wailuku in the next 16 days are 1.4m 12s and forecast to arrive on Monday (Aug 03) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 13s period and expected on Tuesday (Aug 04) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 4th Aug) | 4.5ft (1.4m) 11s |
| Best Surf | 8AM (Tue 4th Aug) | 4.5ft (1.4m) 11s |
| Most Powerful | 11PM (Mon 3rd Aug) | 4.5ft (1.4m) 12s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
G'day, I'm Rusty. Look, I've got to be straight with you – the next 16 days at Rivermouth Wailuku are a real struggle. We've got a solid run of ENE swell coming in, but the wind is locked in from the east-northeast, blowing cross-onshore pretty much the whole time. That's a huge problem. The water temp is sitting right around 80°F which is about average for this time of year, so at least you won't be freezing your arse off for nothing.
Let's start from Monday the 3rd of August. We've got a 4ft ENE swell pushing in with a short period of 8 seconds. The combined energy is weak, only 360. The wind is a light cross-onshore and it's making the surface messy. It's poor – not worth paddling out for.
Tuesday the 4th of August doesn't get any better. The swell bumps up to 5ft on the afternoon session, and the period stretches to 11 seconds, which is a bit longer, giving the waves a bit more shape. But the cross-onshore wind is still there, and the wave comment is marginal or poor. The combined energy climbs to 462, which is moderate, but the wind ruins it.
Wednesday the 5th through to the end of the first week is more of the same – light to moderate cross-onshore winds, swell heights between 3ft and 5ft, and periods that are short, mostly 6 to 9 seconds. The combined energy drops as low as 103 on Friday morning. This is all poor surf conditions. Don't bother.
The second week doesn't offer any hope either. From Monday the 10th of August through to Monday the 17th of August, the swell pushes up, hitting 7ft by Friday the 14th of August. The combined energy gets strong, reaching 515 on the 14th morning, so there's plenty of power out there. But the wind is still ENE, moderate to fresh breeze, always cross-onshore. The wave comment is consistently "poor surf conditions". The period is short, 7 to 8 seconds, so it's messy, wind-affected chop.
Even on the 18th of August, the wind shifts to cross-shore from the east, which is a small change, but the swell is dropping to 4ft, and the surface is lumpy and choppy. Still poor.
There is not a single standout session in this entire 16-day window. The only break we have is Rivermouth Wailuku, a reef break that's fairly consistent, but the wind is just wrong. It's a blank run. For a spot like this, it's not unusual to have a stretch like this when the trade winds lock in. Keep an eye on the forecasts, because things can change, but right now, I'd leave the board in the car.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Warm (max 26°C on Mon afternoon, min 24°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 27°C on Fri afternoon, min 24°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | ||||||||||||||
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) | ENE 8 | ENE 11 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 234 | 447 | 379 | 460 | 281 | 207 | 227 | 169 | 146 | 110 | 37 | 93 | 94 | 168 | 197 | 199 | 261 | 327 | 344 | 298 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 4:58PM0.65m | 6:31AM0.50m | 5:07PM0.58m | 8:17AM0.53m | 4:59PM0.52m | 10:35AM0.60m | 11:51AM0.70m | 12:37PM0.79m | 10:03PM0.34m | 1:16PM0.86m | 11:50PM0.37m | |||||||||
Low Tide | 11:58PM0.11m | 11:22AM0.35m | 00:37AM0.08m | 12:37PM0.46m | 1:32AM0.06m | 2:47AM0.04m | 4:09AM0.00m | 8:44PM0.33m | 5:19AM-0.05m | 8:26PM0.30m | ||||||||||
 |  |  | | | | |  | | | | | |  | | | | |  | | |
 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — |
 | 7:02 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — |
mm | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | 1 | — | 2 | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 27 | 27 | 25 | 26 | 26 | 25 |
Feels °C | 28 | 28 | 29 | 28 | 28 | 27 | 28 | 26 | 27 | 27 | 26 | 26 | 28 | 25 | 27 | 27 | 25 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | E 12 | ENE 11 | ENE 11 | W 13 | ENE 10 | NNE 9 | NNE 8 | NNE 8 | N 8 | NNW 8 | ENE 8 | NNW 7 | NE 9 | NE 11 | NE 10 | NE 10 | NE 9 | W 11 | W 11 | W 11 |
| kJ | 104 | 447 | 379 | 13 | 281 | 8 | 7 | 6 | 5 | 7 | 37 | 10 | 22 | 29 | 32 | 23 | 14 | 10 | 9 | 9 |
Swell 2 Height (m) Direction Period (s) | N 6 | N 6 | W 11 | N 10 | N 9 | W 12 | W 12 | W 12 | W 11 | NNW 8 | NNW 8 | W 10 | NNW 7 | NE 8 | N 7 | N 6 | WSW 18 | WSW 17 | WSW 16 | WSW 16 |
| kJ | 18 | 10 | 2 | 2 | 7 | 11 | 11 | 11 | 10 | 6 | 11 | 2 | 5 | 11 | 3 | 3 | 30 | 27 | 26 | 25 |
Swell 3 Height (m) Direction Period (s) | N 8 | N 7 | SW 17 | SW 17 | W 12 | SW 16 | SW 16 | SW 16 | NNW 8 | N 8 | NE 11 | W 21 | NE 12 | NNW 7 | WSW 18 | WSW 18 | W 12 | SW 13 | S 12 | S 12 |
| kJ | 4 | 4 | 11 | 11 | 12 | 10 | 10 | 9 | 7 | 4 | 5 | 9 | 23 | 5 | 33 | 31 | 11 | 7 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | ENE 8 | — | — | ENE 11 | — | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 4 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 234 | — | — | 460 | — | 207 | 227 | 169 | 146 | 110 | 18 | 93 | 94 | 168 | 197 | 199 | 261 | 327 | 344 | 298 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 12 | 5 | 5 | 12 | 5 | 5 | 5 | 5 | 14 | 14 | 14 | 14 | 20 | 14 | 14 | 14 | 14 | 14 | 20 | 14 |
Best forecast wave conditions in Maui | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Rivermouth_Wailuku Surf forecast
The above surf forecast table for Rivermouth_Wailuku provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rivermouth_Wailuku can be found by selecting the local surf guide option on the grey menu. Our Rivermouth_Wailuku 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 (Rivermouth_Wailuku) 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 Rivermouth_Wailuku 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.
Rivermouth_Wailuku is 4 km (2 miles) from Wailuku. If you plan a vacation in Maui, look for hotels and other accommodation in Wailuku. Wailuku has rooms for a wide range of budgets as well as car hire and transport links.
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