Surf Forecasts:
Rivermouth_Wailuku surf forecast from 18 Jul 2026:
- Most powerful swell: Wednesday 22 Jul, 8PM (local time) - 4.5ft (1.3m), 13s period, ENE swell with 590 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 1.3m 13s and forecast to arrive on Wednesday (Jul 22) 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 0.3m 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 | 8PM (Wed 22nd Jul) | 4.5ft (1.3m) 13s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it.
Well, to be honest, it’s a pretty grim stretch of days ahead for Rivermouth Wailuku. We’ve got a solid 16-day window to look at, but it’s a slow start and there’s nothing really worth paddling out for in the first week.
The first bit of surf that shows up on July 26th is only just barely worth a mention. It’s a Sunday morning with some 4.3ft swell from the east, but it’s a long period groundswell of 17 seconds, which can be a little tricky on a setup like this. The combined energy is a strong 1313, but the wind is a gentle cross-onshore breeze from the ENE, so it’s going to be a bit choppy. The tide or something else is making it marginal, so this is more of a look-see than a go.
The following days, like the 27th and 28th, keep that long period E swell coming, but the wind stays cross-on or onshore, and the combined energy drops from 1203 down to 580 by Tuesday afternoon. The waves are in the 3.9ft to 4.9ft range, but the quality just isn’t there – it’s still described as marginal or poor. The best of this whole run might be the 27th of July Monday morning, with a 4.9ft E swell and a 15-second period, but don’t get your hopes up too high.
After that, the swell fades, the period drops, and the wind stays messy. The 30th has a tiny 2.9ft swell with a light onshore NNE wind, but with a combined energy of only 306, it’s just not doing much. Everything after that is a washout – small, short period, and cross-on. It’s pretty much a write-off through to the end of the first week of August.
So, if you’re looking for a standout, there really isn’t one. The 26th through the 27th is the only window that has any real energy, but it’s compromised by the wind and conditions. For a reef break that’s fairly consistent, this is a frustrating run. Keep the board waxed and wait for the next shift.
Short Range ForecastMostly dry. Warm (max 27°C on Sat morning, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed morning. Warm (max 26°C on Tue morning, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
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 6 | ENE 8 | ENE 8 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 12 | ENE 7 | ENE 11 | ENE 12 | E 12 | ENE 6 | ENE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 178 | 308 | 341 | 224 | 238 | 157 | 124 | 199 | 188 | 120 | 108 | 120 | 102 | 141 | 407 | 511 | 139 | 183 | 158 |
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 |
High Tide | 5:09AM0.44m | 5:32PM0.71m | 6:19AM0.44m | 5:51PM0.62m | 7:53AM0.45m | 6:01PM0.55m | 10:04AM0.50m | 5:44PM0.49m | 11:40AM0.58m | 12:27PM0.64m | |||||||||
Low Tide | 11:52PM0.18m | 10:44AM0.13m | 00:26AM0.16m | 11:26AM0.26m | 1:00AM0.14m | 12:18PM0.37m | 1:38AM0.12m | 2:16PM0.46m | 2:25AM0.11m | 3:23AM0.09m | 4:25AM0.06m | ||||||||
 |  | | |  | | | | | | | | |  | | | | | | |
 | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — |
 | 7:08 | — | 7:08 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — |
Temp °C | 26 | 27 | 27 | 25 | 26 | 27 | 25 | 26 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 27 | 27 | 26 | 25 | 25 | 26 | 25 | 27 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | WNW 13 | WNW 13 | NNE 7 | W 12 | NNE 8 | NNE 8 | W 12 | SW 18 | E 12 | E 12 | E 11 | NE 7 | E 11 | E 14 | NNW 11 | E 12 | NNW 10 | E 11 |
| kJ | 19 | 34 | 34 | 40 | 11 | 49 | 54 | 11 | 12 | 11 | 41 | 39 | 38 | 87 | 33 | 11 | 130 | 9 | 58 |
Swell 2 Height (m) Direction Period (s) | WNW 13 | SW 15 | NNE 8 | WNW 13 | W 20 | W 12 | W 12 | SW 18 | W 12 | WSW 16 | E 15 | E 14 | E 12 | SW 16 | SW 18 | WSW 18 | WSW 20 | WSW 20 | SW 18 |
| kJ | 60 | 9 | 14 | 33 | 8 | 11 | 11 | 13 | 11 | 27 | 17 | 32 | 102 | 10 | 12 | 30 | 38 | 37 | 50 |
Swell 3 Height (m) Direction Period (s) | SW 16 | NE 9 | SW 15 | SW 14 | SW 14 | W 20 | SW 19 | E 14 | E 13 | W 11 | SW 17 | SW 17 | SW 16 | SW 24 | SW 23 | SW 22 | NNW 10 | SW 16 | NNW 9 |
| kJ | 10 | 3 | 8 | 8 | 7 | 7 | 14 | 4 | 13 | 3 | 11 | 11 | 10 | 22 | 21 | 18 | 10 | 10 | 8 |
Wind waves Height (m) Direction Period (s) | E 6 | ENE 8 | ENE 8 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 11 | ENE 12 | ENE 6 | ENE 6 | ENE 7 |
| kJ | 178 | 308 | 341 | 224 | 238 | 157 | 124 | 199 | 188 | 120 | 108 | 120 | 82 | 141 | 407 | 511 | 139 | 183 | 158 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 14 | 5 | 14 | 5 | 5 | 5 | 5 | 5 | 14 | 14 | 14 | 14 | 14 | 14 | 20 | 14 |
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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