
Surf Forecasts:
Rivermouth_Wailuku surf forecast from 7 Jul 2026:
- Most powerful swell: Sunday 12 Jul, 8PM (local time) - 7ft (2.1m), 8s period, ENE swell with 532 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 2.1m 8s and forecast to arrive on Sunday (Jul 12) at 8PM. 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 | 8PM (Sun 12th Jul) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
Updates in hr min s Forecast update imminent
Alright, Rusty here, and I’m not gonna sugarcoat it. Looking at Rivermouth_Wailuku for the next 16 days, it’s a long, frustrating stretch. The wind is stuck cross-onshore the whole time, and the data is all screaming "poor surf conditions."
The first week is a total bust. From Tuesday the 7th right through Monday the 14th, it’s consistent poor surf. The wind is ripping from the ENE and NE at 12 to 15 mph, with a short-period swell of 2ft to 2ft. The combined energy is weak to moderate, ranging from 242 to 508. That short-period stuff with onshore wind is just a mess. There’s nothing to ride here.
Around Tuesday the 14th, the wind eases a bit to 9 mph, but it’s still cross-onshore, so you’re looking at "fairly choppy" conditions. The swell drops too, down to 1ft on Wednesday the 15th. Still not worth getting wet.
Now, the end of the run gets a little more interesting, but it’s still a compromise. On Saturday the 18th afternoon, the swell builds to 2ft from the ENE with a 9-second period, and the combined energy jumps to 760 (moderate energy). That’s the biggest swell of the whole period. But that stubborn 12 mph cross-onshore wind is still there, so the data still calls it "poor surf conditions."
Then on Tuesday the 21st, the afternoon shows the swell dropping to 0.8ft, but the period jumps to a very long 15 seconds from the east. The combined energy is 487. That’s a groundswell, and at a reef break, that could line up nicely. But again, you’ve got a 12 mph cross-onshore wind to deal with, so it’ll be choppy.
Wednesday the 22nd morning is similar: 0.9ft from the east at 14 seconds, with a lighter 9 mph breeze. Still cross-onshore, still "fairly choppy."
So, there’s no clear winner here. Every single entry in the forecast says "poor surf conditions." There is no day with offshore or glassy wind. The only thing that stands out even a little is that very long-period groundswell on the 21st and 22nd. A 15-second period at a reef could offer some real clean, powerful lines if you can handle the onshore wind. But that’s a big "if."
Don’t plan your week around it. This is one of those stretches where the forecast needs to change before it gets good.
- Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Warm (max 26°C on Tue morning, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Fri morning. Warm (max 26°C on Fri morning, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Mon 13 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 8 | E 8 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph | |||||||||||||||||||||
382 | 414 | 356 | 224 | 286 | 353 | 327 | 302 | 310 | 286 | 242 | 237 | 337 | 435 | 397 | 319 | 402 | 508 | 464 | 364 | 344 | |
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 | cross-on |
High Tide | 8:47AM0.43m | 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 | |||||||||
Low Tide | 1:53AM0.12m | 12:43PM0.37m | 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 | |||||||||
— | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | |
7:10 | — | 7:10 | — | — | 7:10 | — | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | |
mm | — | — | — | — | — | — | 2 | — | — | — | 1 | 2 | 2 | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 |
Feels °C | 23 | 25 | 25 | 24 | 25 | 25 | 24 | 26 | 26 | 25 | 27 | 27 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | NE 7 | SW 14 | SW 14 | SW 14 | W 15 | W 14 | W 13 | W 13 | N 8 | W 13 | W 14 | WSW 18 | WSW 17 | WSW 16 | SW 16 | WSW 16 | SW 16 | SW 15 |
9 | 9 | 9 | 122 | 8 | 8 | 7 | 4 | 4 | 4 | 14 | 5 | 13 | 35 | 61 | 59 | 53 | 65 | 50 | 39 | 35 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | NW 9 | NW 9 | SW 15 | — | — | W 16 | SW 13 | SW 13 | SW 14 | W 21 | W 14 | WSW 19 | WSW 18 | W 14 | W 13 | W 13 | W 12 | W 12 | W 12 | W 16 |
4 | 3 | 3 | 8 | — | — | 5 | 7 | 7 | 8 | 9 | 16 | 37 | 34 | 15 | 13 | 13 | 12 | 12 | 12 | 20 | |
Swell 3 Height (m) Direction Period (s) | NW 10 | — | — | — | — | — | — | — | W 18 | W 16 | W 18 | SW 21 | — | — | — | — | W 13 | — | — | NW 16 | W 21 |
4 | — | — | — | — | — | — | — | 6 | 5 | 6 | 17 | — | — | — | — | 13 | — | — | 10 | 9 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 8 | E 8 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
382 | 414 | 356 | 224 | 286 | 353 | 327 | 302 | 310 | 286 | 242 | 237 | 337 | 435 | 397 | 319 | 402 | 508 | 464 | 364 | 344 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 20 | 14 | 14 | 14 | 14 | 20 | 14 | 20 | 20 | 20 | 20 | 14 | 20 | 20 | 14 | 14 | 14 | 20 | 20 | 20 |
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.











