Surf Forecasts:
Rivermouth_Wailuku surf forecast from 18 Jul 2026:
- Most powerful swell: Thursday 23 Jul, 2AM (local time) - 4.5ft (1.4m), 12s period, ENE swell with 579 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 1.4m 12s and forecast to arrive on Thursday (Jul 23) 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 0.3m 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 | 2AM (Thu 23rd Jul) | 4.5ft (1.4m) 12s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
Alright, folks. Rusty here. Let’s break it down. The first week and a half is a total bummer. The only break in the game is Rivermouth_Wailuku, and it’s getting chewed up by a cross-onshore wind from the ENE. No good.
From Saturday the 18th all the way through to Friday the 31st of July, it’s a desert. The swell is small, mostly weak with combined energy between 169 and 572 (moderate), but the wind is the killer. The water temp is 79°F, right around average for the time of year. The problem is the constant chop. You’re looking at 1 to 2ft, poor surf conditions every day. Don’t bother.
Now, here’s the one bright spot. The morning of Sunday the 26th of July. Swell jumps from the E at 5ft, with a period of 17 seconds – that’s a very long period groundswell. The combined energy hits 1348 (strong). The wind is still a cross-on from the ENE, but it’s only a light breeze at 9 mph, so it’s not as messy. This is the only standout. The swell is big and long, which is good for a reef, but the direction is ENE, not the optimal NNE. Might be a bit of a gamble on shape. Still, it’s the best you’ll get.
The morning of the 27th is similar, with 6ft E swell and a 16-second period (combined energy 1934), but the wind is still cross-on. The energy is massive, but the quality is marginal. After that, the swell sticks around through the 28th and 29th, but the wind never lets up. The 30th of July morning has a light NE breeze at 3 mph, which is close to glassy, but the swell is only 5ft from the NE with a 10-second period (combined energy 394). It’s a consolation prize.
The long story short: if you’re a kite surfer, the whole 16-day window is a dream with that steady cross-on wind and building swell. For paddle surfing, the only session worth a look is the morning of the 26th of July, and even that’s a maybe. The rest is a washout.
Rusty out.
Short Range ForecastMostly dry. Warm (max 27°C on Sat morning, min 24°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue afternoon. Warm (max 26°C on Tue morning, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||
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 | E 8 | ENE 8 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 12 | ENE 11 | ENE 11 | ENE 6 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 318 | 341 | 280 | 191 | 238 | 153 | 186 | 188 | 120 | 108 | 111 | 149 | 128 | 430 | 579 | 521 | 494 | 161 | 181 | 251 | 265 |
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 | 5:32PM0.71m | 6:19AM0.44m | 5:51PM0.62m | 7:53AM0.45m | 6:01PM0.55m | 10:04AM0.50m | 5:44PM0.49m | 11:40AM0.58m | 12:27PM0.64m | 1:01PM0.69m | |||||||||||
Low Tide | 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 | — | — | 5:56 | — | — |
 | — | 7:08 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 27 | 27 | 25 | 25 | 25 | 25 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 24 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | WNW 13 | WNW 13 | WNW 13 | NNE 7 | W 12 | NNE 8 | W 12 | SW 18 | E 12 | E 12 | E 11 | E 12 | E 11 | SW 18 | NNW 11 | WSW 20 | NNW 10 | E 10 | ENE 10 | SW 17 | E 15 |
| kJ | 34 | 34 | 33 | 42 | 11 | 35 | 11 | 12 | 11 | 23 | 39 | 103 | 121 | 12 | 11 | 38 | 9 | 56 | 33 | 47 | 67 |
Swell 2 Height (m) Direction Period (s) | SW 15 | NNE 8 | SW 14 | W 12 | W 20 | W 12 | SW 18 | W 12 | WSW 16 | E 15 | E 14 | SW 16 | SW 16 | SW 23 | WSW 18 | NNW 10 | WSW 20 | SW 18 | NNW 9 | E 16 | SW 16 |
| kJ | 9 | 14 | 8 | 11 | 7 | 11 | 13 | 11 | 27 | 38 | 32 | 10 | 10 | 21 | 30 | 10 | 37 | 50 | 8 | 20 | 41 |
Swell 3 Height (m) Direction Period (s) | NE 9 | SW 15 | W 21 | W 20 | S 14 | SW 19 | E 14 | E 13 | W 11 | SW 17 | SW 17 | W 11 | SW 24 | N 12 | SW 22 | SW 16 | SW 16 | NNW 9 | WSW 18 | NNW 8 | ENE 9 |
| kJ | 3 | 8 | 9 | 8 | 4 | 14 | 4 | 13 | 3 | 11 | 11 | 2 | 22 | 3 | 18 | 10 | 10 | 8 | 31 | 7 | 17 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 12 | ENE 11 | ENE 11 | ENE 6 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 318 | 341 | 280 | 191 | 238 | 153 | 186 | 188 | 120 | 108 | 111 | 149 | 128 | 430 | 579 | 521 | 494 | 161 | 181 | 251 | 265 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 14 | 20 | 14 | 14 | 5 | 5 | 14 | 5 | 14 | 20 | 14 | 14 | 20 | 14 | 20 | 20 | 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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