Surf Forecasts:
Rivermouth_Wailuku surf forecast from 31 Jul 2026:
- Most powerful swell: Tuesday 4 Aug, 2AM (local time) - 5ft (1.6m), 12s period, ENE swell with 701 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 1.6m 12s and forecast to arrive on Tuesday (Aug 04) at 2AM. 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 | 2AM (Tue 4th Aug) | 5ft (1.6m) 12s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at the stretch ahead for Rivermouth Wailuku. Gotta be straight with you – it’s gonna be a tough run for paddle surfing. The whole 16-day window is pretty much a write-off for anything decent.
We start off on Friday the 31st of July, and right through the first weekend and into the next week, it’s all poor conditions. The wind is stuck in a cross-onshore groove, mostly from the ENE, keeping the surface choppy and lumpy. We’ve got some size – swell heights around 6 ft to 7 ft and wave energy is moderate (588 to 865) – but with a short, weak period of 8 seconds, it’s just messy, wind-affected slop. No good.
Monday the 3rd and Tuesday the 4th of August see the swell drop a bit and the period stretches out to 11 seconds on Tuesday, which hints at a cleaner groundswell. The wind eases a little too. But even then, it’s only rated as marginal at best. The wind is still on it, and the energy is moderate (412 to 532). It’s not enough to get excited about, and it’s not clean enough to actually enjoy.
From Wednesday the 5th of August right through to Saturday the 15th of August, it’s a long, unbroken stretch of poor surf. Swell heights bob around 3 ft to 7 ft, but the wind never lets up – always a cross-onshore breeze, light to moderate. The period is short, mostly 6 to 8 seconds, meaning weak, choppy waves. The combined wave energy drops into the low to moderate range (111 to 507), confirming it’s all pretty gutless and cruddy.
Honestly, for this entire 16-day forecast, there isn't a single standout session. With the wind direction locked in onshore and the swell quality poor, this setup actually looks more interesting for kite surfing than paddle surfing. The water temperature is about average for this time of year, but that’s the only thing that’s normal.
Don’t hang your hopes on this one. Forecasts can change, but as it stands, it’s a blank run.
- Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Fri afternoon, min 24°C on Sat night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Tue morning, min 24°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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) | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 259 | 346 | 416 | 542 | 614 | 660 | 567 | 537 | 477 | 422 | 284 | 275 | 701 | 531 | 511 | 454 | 218 | 203 | 153 |
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 | on | cross | cross-on | cross-on | cross-on |
High Tide | 2:58AM0.47m | 4:04PM0.80m | 3:39AM0.48m | 4:25PM0.76m | 4:25AM0.49m | 4:43PM0.71m | 5:20AM0.50m | 4:58PM0.65m | 6:31AM0.50m | 5:07PM0.58m | 8:17AM0.53m | 4:59PM0.52m | |||||||
Low Tide | 10:10PM0.21m | 8:59AM-0.02m | 10:34PM0.19m | 9:31AM0.05m | 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 | ||||||
 |  | | | | | | | |  | |  | | | | | | |  | |
 | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — |
 | 7:05 | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 27 | 27 | 28 | 26 | 27 | 27 | 25 | 27 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 27 | 27 | 27 | 25 | 26 | 25 | 24 | 26 | 25 | 24 | 27 | 27 | 27 | 29 | 29 | 27 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | E 16 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 13 | E 12 | N 7 | ENE 11 | W 13 | ENE 10 | NNE 9 | NNE 9 | NNE 8 |
| kJ | 183 | 228 | 219 | 202 | 194 | 196 | 183 | 142 | 130 | 87 | 117 | 146 | 4 | 531 | 13 | 301 | 8 | 7 | 6 |
Swell 2 Height (m) Direction Period (s) | N 9 | N 9 | N 8 | N 8 | N 8 | SW 14 | N 10 | N 9 | N 9 | N 8 | N 8 | N 7 | W 12 | WSW 16 | N 10 | NNE 9 | W 12 | W 12 | W 13 |
| kJ | 15 | 14 | 12 | 11 | 10 | 8 | 18 | 15 | 14 | 12 | 11 | 17 | 3 | 26 | 2 | 9 | 11 | 11 | 13 |
Swell 3 Height (m) Direction Period (s) | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | N 11 | SW 14 | SW 14 | W 12 | W 12 | W 11 | W 12 | W 18 | N 7 | SW 17 | W 12 | SW 16 | SW 16 | SW 15 |
| kJ | 27 | 25 | 25 | 22 | 21 | 9 | 8 | 8 | 3 | 3 | 2 | 3 | 6 | 1 | 11 | 12 | 10 | 10 | 9 |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | — | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 |
| kJ | 259 | 346 | 416 | 542 | 614 | 660 | 567 | 537 | 477 | 422 | 284 | 275 | 701 | — | 511 | 454 | 218 | 203 | 153 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 14 | 14 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 14 | 5 | 21 | 5 | 5 | 20 | 2 | 14 | 14 | 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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