Surf Forecasts:
Rivermouth_Wailuku surf forecast from 8 Jul 2026:
- Most powerful swell: Sunday 12 Jul, 11PM (local time) - 6ft (1.9m), 8s period, ENE swell with 453 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 1.9m 8s and forecast to arrive on Sunday (Jul 12) 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 0.4m 16s period and expected on Sunday (Jul 12) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sun 12th Jul) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
Alright, Rusty here. Let’s talk about what’s on the cards.
Right off the bat, I gotta be straight with you: there’s no good surf in sight for Rivermouth Wailuku for a long stretch. We’re looking at a solid 14-day gap from now until the 20th of July where the conditions are just poor. Cross-onshore wind and choppy surf dominate the picture, and the combined swell energy (385 on Tuesday afternoon) ain’t helping. It’s not clean, it’s not organised, it’s just grumpy reef chop.
The water temperature is sitting at 79°, which is about normal for the time of year, so at least you won’t freeze while you’re sitting there watching mediocre waves.
Now, things start to shift late on Monday the 20th of July. That afternoon you get a marginal window with a 6ft swell from the ENE, still cross-onshore wind at 9 mph, but the combined swell energy jumps up to 625. It’s still just a "maybe" – not worth rushing for, but you’d be smart to keep an eye on it.
Tuesday the 21st of July is where it gets interesting. The morning brings a completely different setup. A groundswell from the East sneaks in at 4ft, but with a period of 16 seconds – that is very long period, which always means more power and shape. The combined swell energy hits 959, so there’s proper push behind it. The wind drops to a light breeze at 6 mph, still cross-onshore but the texture will be glassy with only small wind ripples. For a reef setup like Rivermouth Wailuku, that long period groundswell is gold. This is the standout of the whole outlook. If you can get to Tuesday morning, that’s your moment. The crowd factor here is often busy though, so expect company.
Wednesday the 22nd of July keeps some of that long period energy coming – E swell at 3ft, 15 seconds – but the wind picks up again to 9 mph from the E, and the conditions turn back to choppy. The combined swell energy drops to 669 and 647, so Tuesday morning was the true peak.
So if you want a score, point your board at Tuesday the 21st of July morning. That’s the call.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu night. Warm (max 26°C on Tue afternoon, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Fri afternoon. Warm (max 26°C on Fri afternoon, min 24°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tue 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 7 | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 382 | 294 | 327 | 353 | 193 | 294 | 270 | 310 | 319 | 334 | 369 | 397 | 310 | 238 | 355 | 434 | 453 | 382 | 285 | 236 | 163 |
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 | on | cross-on | cross-on |
High Tide | 6:42PM0.55m | 10:41AM0.53m | 7:00PM0.48m | 11:52AM0.64m | 12:42PM0.75m | 9:34PM0.37m | 1:26PM0.84m | 11:19PM0.36m | 2:08PM0.90m | 00:31AM0.37m | 2:48PM0.93m | 1:30AM0.39m | |||||||||
Low Tide | 2:40AM0.06m | 3:32PM0.46m | 3:32AM0.01m | 4:29AM-0.05m | 8:19PM0.37m | 5:24AM-0.11m | 8:39PM0.33m | 6:18AM-0.15m | 9:08PM0.29m | 7:08AM-0.18m | 9:39PM0.26m | 7:55AM-0.18m | |||||||||
 |  | | |  |  | |  | |  | | | | | | | | | | | | |
 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 |
 | 7:10 | — | — | 7:10 | — | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | 7:09 |
mm | — | — | — | — | — | — | — | 1 | — | 2 | 2 | — | — | — | — | — | 1 | — | — | 1 | — |
Temp °C | 26 | 24 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 24 | 26 |
Feels °C | 25 | 23 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 26 | 25 | 24 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 24 | 27 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 14 | SW 14 | NE 8 | W 15 | W 14 | W 13 | W 13 | N 8 | W 13 | W 14 | WSW 18 | N 8 | WSW 16 | SW 16 | SW 16 | SW 16 | WSW 15 | N 8 | NNE 8 |
| kJ | 9 | 8 | 8 | 8 | 186 | 4 | 4 | 4 | 14 | 5 | 14 | 35 | 61 | 43 | 53 | 65 | 64 | 39 | 22 | 12 | 105 |
Swell 2 Height (m) Direction Period (s) | NW 9 | NW 8 | — | — | SW 14 | SW 13 | SW 13 | SW 14 | W 21 | W 15 | WSW 19 | WSW 19 | W 14 | WSW 18 | W 13 | W 12 | W 12 | W 12 | W 16 | W 14 | W 14 |
| kJ | 3 | 3 | — | — | 7 | 7 | 7 | 8 | 9 | 17 | 37 | 34 | 15 | 60 | 13 | 12 | 11 | 12 | 19 | 16 | 36 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 16 | — | W 18 | W 16 | W 18 | W 12 | — | — | — | W 13 | W 13 | W 12 | W 12 | W 20 | NW 20 | WSW 14 | WNW 19 |
| kJ | — | — | — | — | 5 | — | 6 | 5 | 6 | 12 | — | — | — | 13 | 13 | 12 | 3 | 8 | 15 | 21 | 34 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 7 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 8 |
| kJ | 382 | 294 | 327 | 353 | 193 | 294 | 270 | 310 | 319 | 334 | 369 | 397 | 310 | 238 | 355 | 434 | 453 | 382 | 285 | 236 | 163 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 20 | 14 | 14 | 14 | 14 | 14 | 20 | 20 | 20 | 20 | 20 | 20 | 14 | 14 | 20 | 14 | 20 | 20 | 14 | 5 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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