Surf Forecasts:
Rivermouth_Wailuku surf forecast from 2 Aug 2026:
- Most powerful swell: Monday 3 Aug, 11PM (local time) - 5ft (1.5m), 12s period, ENE swell with 612 kJ wave energy.
Best Forecast Surf Conditions for Rivermouth_Wailuku this week:
The most powerful waves expected at Rivermouth_Wailuku in the next 16 days are 1.5m 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 11s period and expected on Tuesday (Aug 04) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Mon 3rd Aug) | 5ft (1.5m) 12s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
Alright, Rusty here, and I’m breaking down the only spot we’ve got to look at, Rivermouth_Wailuku. It’s a reef break that’s fairly consistent, but the wind is the enemy for the next two weeks. We’ve got a 16-day window, but there’s a long dry spell right at the start.
The pattern is set from the jump. Starting Sunday, August 2nd, we’ve got a persistent ENE wind blowing cross-on, and it’s got some muscle. The water temp is about normal for the season. The first few days have some swell, a messy, short-period wind swell from 5ft to 7ft, and the combined energy is moderate (745 on Sunday morning). But the wind is destroying it. It’s all “poor surf conditions” with chop, so don’t even bother for the first week.
The wind backs off a bit on Monday the 3rd and Tuesday the 4th, but it’s still cross-on, and the swell drops. The period gets longer on Tuesday, hitting 11 seconds, which would be a nice groundswell for the reef, but the wind is still on it. The combined energy drops to a weak 436. The break is exposed to the swell, but the wind direction just kills it.
The whole first week is a washout. We’re looking at a solid 7 days of nothing worth surfing. The consistency is there, but the quality is zero. The wind stays cross-on from the ENE, and the swell, even when it peaks around the 8th and 9th of August, is still paired with a moderate breeze that leaves it choppy. Even the 6ft swell on Sunday the 9th (combined energy 322) is a messy, slow close-out.
We get a slight shift on the 16th of August, a Sunday morning, with a bit more size at 5ft, and the energy picks up a little (296). But it’s still cross-on. The best hope is the 17th of August, a Monday morning, with a similar 6ft swell from the ENE (combined energy 417), but the wind is still a cross-on ENE breeze. It’s not a standout, but it’s the only window where the swell is pushing 6ft, and if you’re desperate, you might find a few lumpy ones. For a reef, we’d need a longer period to make it work.
Truth is, for this whole 16-day run, there’s not a single moment where the wind and swell are in sync. This setup looks more interesting for kite surfing than paddle surfing. It’s a rough stretch, but that’s the way it goes. The forecast can change, but for now, I’d leave the board at home.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun night. Warm (max 27°C on Sun morning, min 24°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Fri morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | ||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 11 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | NE 8 | E 6 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 588 | 588 | 477 | 370 | 261 | 284 | 560 | 436 | 404 | 281 | 207 | 244 | 212 | 140 | 105 | 28 | 98 | 175 | 180 |
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 | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 4:25AM0.49m | 4:43PM0.71m | 5:20AM0.50m | 4:58PM0.65m | 6:31AM0.50m | 5:07PM0.58m | 8:17AM0.53m | 4:59PM0.52m | 10:35AM0.60m | 11:51AM0.70m | |||||||||
Low Tide | 11:00PM0.16m | 10:03AM0.14m | 11:27PM0.13m | 10:39AM0.24m | 11:58PM0.11m | 11:22AM0.35m | 00:37AM0.08m | 12:37PM0.46m | 1:32AM0.06m | 2:47AM0.04m | 4:09AM0.00m | ||||||||
 |  | |  | |  |  | | | | | | |  | | | | | | |
 | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — |
 | 7:04 | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — |
mm | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 27 | 27 | 25 | 27 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 |
Feels °C | 24 | 26 | 26 | 24 | 28 | 27 | 26 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | E 14 | E 14 | E 13 | E 13 | E 13 | E 12 | ENE 11 | ENE 11 | W 13 | ENE 10 | ENE 9 | NNE 8 | ENE 8 | NNW 8 | NNW 8 | NE 8 | NNW 7 | NNW 7 | NE 11 |
| kJ | 183 | 142 | 130 | 125 | 119 | 104 | 560 | 436 | 13 | 281 | 207 | 7 | 134 | 7 | 6 | 28 | 10 | 5 | 40 |
Swell 2 Height (m) Direction Period (s) | N 10 | N 9 | N 9 | N 8 | N 8 | N 7 | N 7 | W 11 | N 10 | N 9 | NNE 9 | W 12 | NNE 8 | N 8 | N 8 | NNW 7 | SW 14 | SW 20 | NNW 7 |
| kJ | 18 | 15 | 14 | 12 | 11 | 17 | 4 | 2 | 2 | 7 | 8 | 11 | 6 | 5 | 4 | 5 | 8 | 15 | 5 |
Swell 3 Height (m) Direction Period (s) | SW 14 | SW 14 | W 12 | W 12 | W 11 | W 12 | W 12 | SW 17 | SW 17 | W 12 | W 12 | SW 16 | W 12 | W 11 | W 12 | ENE 10 | W 21 | SW 14 | WSW 19 |
| kJ | 8 | 8 | 3 | 3 | 2 | 3 | 11 | 11 | 11 | 12 | 11 | 10 | 11 | 10 | 11 | 11 | 9 | 8 | 37 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | ENE 11 | — | — | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 4 | E 6 | ENE 7 | ENE 7 |
| kJ | 588 | 588 | 477 | 370 | 261 | 284 | — | — | 404 | — | — | 244 | 212 | 140 | 105 | 27 | 98 | 175 | 180 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 20 | 20 | 21 | 20 | 5 | 20 | 5 | 5 | 14 | 5 | 5 | 14 | 14 | 14 | 14 | 14 | 14 | 21 | 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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