Surf Forecasts:
Rivermouth_Wailuku surf forecast from 6 Aug 2026:
- Most powerful swell: Sunday 9 Aug, 2PM (local time) - 5ft (1.6m), 8s period, ENE swell with 295 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 1.6m 8s and forecast to arrive on Sunday (Aug 09) 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 0.2m 12s period and expected on Thursday (Aug 06) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 9th Aug) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s coming our way for the next couple of weeks.
Honestly, I gotta be straight with you – this is a rough stretch. The whole 16-day window is one long, frustrating run of poor surf quality. The wind is stuck in a cross-onshore pattern the entire time, with a stiff ENE breeze, so conditions are gonna be choppy and lumpy. There is no real standout session, no clean glassy window to get excited about. The best you can hope for is a marginal day right at the very end, but it’s a long way off.
We start with nothing on offer. The first few days aren't even worth a look. From Thursday, August 6th through to the morning of Tuesday, August 19th, it’s all poor surf and cross-onshore winds. The swell is there, but it’s a mess. The combined energy is weak to moderate, with the swell period sitting short at 5 to 8 seconds, so it’s all windswell – no real power or shape.
The only real glimmer in this whole forecast comes on the morning of Wednesday, August 19th at Rivermouth_Wailuku. The call is marginal, not good, but it's the best we’ve got. The swell will be a solid 8 ft from the ENE with a period of 10 seconds, and the combined energy jumps up to 1371, so there’s some proper juice in the water. That’s expert-level size, and it will be a heavy, powerful wave. The wind is still a cross-onshore breeze at 15 km/h, so it won’t be perfect, but it’s the lightest wind of the whole period. The water temperature is sitting at 80°, which is about average for this time of year. This is a reef break that is fairly consistent, but it can get crowded often, so you’ll have company if you paddle out. Just be aware that the ENE swell direction is cross to the optimum NNE direction they prefer, so the wave won’t be at its absolute best.
After that, the swell drops back down and the cross-onshore wind returns, shutting it down again through the 21st. It’s a tough outlook, but that’s how it goes sometimes. Forecasts can change, so keep an eye on it.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu afternoon. Warm (max 27°C on Sat morning, min 24°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sun afternoon. Warm (max 27°C on Sun afternoon, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 7 | ENE 7 | ENE 5 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 157 | 131 | 78 | 96 | 66 | 135 | 143 | 215 | 222 | 258 | 273 | 246 | 240 | 210 | 214 | 186 | 181 | 161 | 135 | 101 | 104 |
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 | 10:35AM0.60m | 11:51AM0.70m | 12:37PM0.79m | 10:03PM0.34m | 1:16PM0.86m | 11:50PM0.37m | 1:52PM0.90m | 00:51AM0.42m | 2:25PM0.92m | 1:42AM0.48m | 2:56PM0.91m | 2:28AM0.52m | |||||||||
Low Tide | 2:47AM0.04m | 4:09AM0.00m | 8:44PM0.33m | 5:19AM-0.05m | 8:26PM0.30m | 6:16AM-0.09m | 8:41PM0.26m | 7:05AM-0.11m | 9:02PM0.23m | 7:50AM-0.10m | 9:26PM0.19m | ||||||||||
 |  |  |  | | | | |  | |  | | | | | | | | | | | |
 | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — |
mm | — | 1 | — | — | — | — | — | — | — | — | 2 | — | — | 2 | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 25 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 25 | 27 | 27 | 26 |
Feels °C | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 26 | 25 | 27 | 28 | 28 | 29 | 28 | 27 | 28 | 27 | 25 | 27 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | N 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NE 11 | NE 10 | N 6 | NE 9 | NE 9 | NE 8 | NNW 10 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | W 13 | W 12 |
| kJ | 5 | 6 | 11 | 10 | 5 | 18 | 24 | 3 | 14 | 20 | 18 | 20 | 17 | 16 | 13 | 12 | 6 | 5 | 5 | 13 | 11 |
Swell 2 Height (m) Direction Period (s) | W 11 | W 12 | NE 11 | W 11 | NE 12 | NNW 7 | N 7 | WSW 18 | WSW 18 | WSW 17 | NNW 11 | NE 9 | W 11 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | NW 7 | SW 16 |
| kJ | 10 | 11 | 5 | 9 | 23 | 5 | 3 | 31 | 30 | 27 | 24 | 12 | 9 | 8 | 8 | 8 | 8 | 9 | 8 | 2 | 11 |
Swell 3 Height (m) Direction Period (s) | NW 8 | N 7 | W 11 | SW 14 | SW 20 | WSW 19 | WSW 18 | SW 13 | N 6 | W 12 | WSW 16 | W 11 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 18 | SW 18 | N 7 |
| kJ | 3 | 4 | 10 | 8 | 15 | 37 | 33 | 7 | 3 | 11 | 26 | 9 | 10 | 10 | 9 | 8 | 8 | 8 | 12 | 12 | 1 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 5 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 |
| kJ | 157 | 131 | 78 | 96 | 66 | 135 | 143 | 215 | 222 | 258 | 273 | 246 | 240 | 210 | 214 | 186 | 181 | 161 | 135 | 101 | 104 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 20 | 14 | 14 | 14 | 14 | 14 | 20 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 20 | 14 | 14 | 20 | 14 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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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