Surf Forecasts:
Rivermouth_Wailuku surf forecast from 19 Jul 2026:
- Most powerful swell: Sunday 26 Jul, 2PM (local time) - 5ft (1.5m), 16s period, E swell with 1,129 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 16s and forecast to arrive on Sunday (Jul 26) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 19s period and expected on Thursday (Jul 23) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 26th Jul) | 5ft (1.5m) 16s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
Alright, Rusty here. Let's break down the surf for the next couple of weeks.
Honestly, it starts off grim. From Sunday, July 19th, all the way through to the 26th, it's a total loss. The wind is a stubborn cross-onshore breeze from the ENE, and the swell is all short-period, choppy slop. The water is 80°F, which is pretty normal for the season, but that doesn't help the waves. It's a long, dry stretch.
Now, there is one day that actually looks worth paddling out for. That's Tuesday, July 28th. The wind is finally forecast to swing to a on direction from the NNE, which is offshore for Rivermouth_Wailuku. That's a game-changer. The swell is a solid east-southeast groundswell running 5ft to 6ft with a period of 12-13 seconds. That long period carries some serious punch, with the combined energy hitting a strong 1089. Because it's a reef break, this long-period energy will focus up nicely. It's a fairly consistent wave, but you can expect crowds on a day like this. The morning of the 28th is the clear winner.
After that, it's back to the struggle. The wind turns cross-on again, and the swell fades. From the 29th of July through the 2nd of August, the wave height drops below 3ft, and the energy is weak. We see a little pulse on the 3rd of August with a 3ft east swell and a 15-second period, but the cross-onshore wind from the ENE will spoil it.
The bottom line: if you're itching for a wave, the 28th of July is your only real shot. It's a small window of clean, powerful surf in a forecast that's otherwise pretty bleak.
Rusty out.
Short Range ForecastLight rain (total 3mm), mostly falling on Mon afternoon. Warm (max 27°C on Sun morning, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Thu night. Warm (max 27°C on Fri morning, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | |||||||||||||||
AM | 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 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 12 | ENE 12 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | NE 8 | E 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 229 | 238 | 238 | 193 | 193 | 158 | 158 | 181 | 158 | 128 | 559 | 589 | 219 | 166 | 257 | 303 | 301 | 302 | 382 | 388 | 592 |
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 | 5:51PM0.62m | 7:53AM0.45m | 6:01PM0.55m | 10:04AM0.50m | 5:44PM0.49m | 11:40AM0.58m | 12:27PM0.64m | 1:01PM0.69m | 1:30PM0.73m | 11:19PM0.34m | |||||||||||
Low Tide | 11:26AM0.26m | 1:00AM0.14m | 12:18PM0.37m | 1:38AM0.12m | 2:16PM0.46m | 2:25AM0.11m | 3:23AM0.09m | 4:25AM0.06m | 5:21AM0.03m | 8:39PM0.32m | |||||||||||
 | |  |  |  | | | | | | |  | | |  | | | | | | | |
 | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — |
 | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | 1 | — | — | 2 | — | — | — | — | — | — | 2 | — | — | — | — | — | 2 |
Temp °C | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 26 | 25 | 26 | 26 | 24 |
Feels °C | 26 | 26 | 24 | 27 | 27 | 26 | 27 | 26 | 25 | 26 | 26 | 24 | 25 | 25 | 24 | 26 | 24 | 24 | 25 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NNE 8 | W 12 | W 12 | SW 18 | E 12 | E 11 | E 14 | E 12 | E 11 | SW 18 | NNW 11 | WSW 20 | E 11 | SW 18 | WSW 18 | SW 17 | ENE 9 | E 17 | E 16 | E 16 |
| kJ | 19 | 12 | 11 | 10 | 12 | 11 | 23 | 33 | 103 | 123 | 12 | 11 | 38 | 86 | 50 | 31 | 47 | 8 | 143 | 246 | 592 |
Swell 2 Height (m) Direction Period (s) | W 12 | W 12 | SW 19 | SW 18 | W 12 | WSW 16 | E 15 | E 11 | SW 16 | SW 16 | SW 23 | SW 22 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 8 | E 16 | SW 19 | SW 18 | SW 18 |
| kJ | 11 | 11 | 14 | 13 | 11 | 27 | 38 | 22 | 10 | 10 | 21 | 18 | 10 | 9 | 8 | 8 | 7 | 19 | 15 | 51 | 49 |
Swell 3 Height (m) Direction Period (s) | W 20 | W 20 | S 13 | E 14 | E 13 | W 11 | SW 17 | SW 17 | W 11 | SW 24 | N 12 | WSW 18 | SW 16 | WSW 20 | — | SW 15 | SW 21 | WSW 16 | SW 16 | — | SW 18 |
| kJ | 8 | 7 | 4 | 4 | 13 | 3 | 11 | 11 | 2 | 22 | 3 | 30 | 10 | 37 | — | 9 | 18 | 26 | 10 | — | 12 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 12 | ENE 12 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | NE 8 | NE 8 |
| kJ | 229 | 238 | 238 | 193 | 193 | 158 | 158 | 181 | 158 | 128 | 559 | 589 | 219 | 166 | 257 | 303 | 301 | 302 | 382 | 388 | 355 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 5 | 14 | 5 | 14 | 14 | 20 | 14 | 20 | 14 | 20 | 20 | 14 | 20 | 20 | 20 | 14 | 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.
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