Surf Forecasts:
Rivermouth_Wailuku surf forecast from 8 Aug 2026:
- Best quality surf: Saturday 15 Aug, 5AM (local time) - 20ft (6.0m), 15s period, E swell with cross-onshore winds.
- Most powerful swell: Saturday 15 Aug, 8AM (local time) - 25ft (7.5m), 14s period, E swell with 21,363 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 5AM (local time) - 20ft (6.0m), 15s period with E swell.
Best Forecast Surf Conditions for Rivermouth_Wailuku this week:
The surf forecast for Rivermouth_Wailuku over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 15) at 5AM. The primary swell is predicted to be 6.0m and 15s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Rivermouth_Wailuku in the next 16 days are 7.5m 14s and forecast to arrive on Saturday (Aug 15) at 8AM. 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 19s period and expected on Saturday (Aug 08) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 15th Aug) | 20ft (6.0m) 15s |
| Best Surf | 5AM (Sat 15th Aug) | 20ft (6.0m) 15s |
| Most Powerful | 8AM (Sat 15th Aug) | 25ft (7.5m) 14s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – this 16-day window for Rivermouth_Wailuku looks tough.
Right off the bat, there’s no surf worth paddling out for until the second week. For the first week, from Saturday the 8th of August right through to the following Friday the 14th, we’re looking at a solid run of poor surf. The swell’s hanging around between 4ft and 5ft mostly, but it's all short-period, 7 to 8 seconds, and every single session has a cross-onshore wind chewing it up. It’s choppy, messy, and just not fun. The combined wave energy stays weak to moderate, between 152 and 377.
Then things get weird. On Friday the 14th, the swell starts to push up. By Saturday morning the 15th of August, the models are throwing a massive 28ft swell at us from the east with a very long 14-second period. The combined energy is absolutely pumping, hitting 27557, but honestly, that’s way too much juice for this spot. It’s a reef setup, and that size is for experts only if they’re feeling brave. The wind stays cross-on, 15-22 mph, so it’s going to be a lumpy, dangerous mess. For a couple of days there, it might be more interesting for the kite crew than a paddle surfer.
After that peak, it drops back down but stays average to poor. Sunday the 16th has a 7ft swell with the same cross-onshore wind, and from Monday the 17th through to Sunday the 23rd of August, we’re back to that 4ft to 5ft range, short period, and onshore conditions. The combined energy settles back down to the 124-314 range. Nothing to get excited about.
Overall, there are no standout sessions here. The best bet, if you’re desperate, is to eyeball the morning of Saturday the 23rd of August. It’s still only 5ft from the east with a 6-second period, but the wind is lighter at 9 mph out of the east-northeast—still cross-onshore, but maybe it’ll be a little less chopped out than the rest. It’s not great, but it’s the cleanest dirty shirt in the laundry.
This stretch is a write-off for most of us. Keep an eye on the charts, but don't hold your breath. Conditions like these are fairly common here, so it’s not unusual to see a blank run like this.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun afternoon. Warm (max 28°C on Sat morning, min 25°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Tue morning, min 24°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | ENE 9 | ENE 11 | E 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 149 | 162 | 204 | 253 | 353 | 287 | 272 | 240 | 234 | 228 | 228 | 186 | 173 | 151 | 183 | 227 | 265 | 468 | 980 | 1976 | 12451 |
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 | 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 | 3:25PM0.87m | 3:13AM0.55m | 3:50PM0.81m | 3:59AM0.57m | |||||||
Low Tide | 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 | 8:31AM-0.06m | 9:51PM0.16m | 9:10AM0.02m | 10:16PM0.13m | ||||||||
 | |  | |  |  | | | | | | | | | | | |  |  | | | |
 | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — |
mm | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 28 | 28 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 26 | 26 | 27 | 27 |
Feels °C | 28 | 28 | 26 | 29 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 25 | 27 | 27 | 25 | 26 | 26 | 25 | 24 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | N 7 | N 6 | NE 9 | WSW 17 | NNW 11 | NNW 10 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | W 13 | W 12 | W 12 | SW 16 | ESE 12 | W 12 | W 12 | — |
| kJ | 3 | 3 | 22 | 27 | 24 | 20 | 16 | 16 | 13 | 12 | 6 | 5 | 5 | 13 | 11 | 11 | 10 | 29 | 3 | 3 | — |
Swell 2 Height (m) Direction Period (s) | WSW 18 | WSW 18 | WSW 18 | W 12 | WSW 16 | NE 9 | W 11 | W 10 | W 10 | W 10 | W 10 | W 11 | W 10 | NW 7 | NW 7 | N 7 | W 12 | NW 8 | S 15 | S 14 | — |
| kJ | 33 | 31 | 30 | 11 | 26 | 12 | 9 | 8 | 8 | 8 | 8 | 9 | 9 | 2 | 2 | 1 | 11 | 3 | 4 | 4 | — |
Swell 3 Height (m) Direction Period (s) | SW 14 | SW 13 | N 6 | N 12 | W 11 | W 11 | NNE 8 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 18 | SW 18 | SW 16 | SW 16 | NW 7 | W 12 | W 18 | W 17 | — |
| kJ | 8 | 7 | 3 | 3 | 10 | 9 | 7 | 10 | 9 | 9 | 8 | 7 | 12 | 12 | 11 | 10 | 2 | 3 | 6 | 6 | — |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | ENE 9 | ENE 11 | E 15 |
| kJ | 149 | 162 | 204 | 253 | 353 | 287 | 272 | 240 | 234 | 228 | 228 | 186 | 173 | 151 | 183 | 227 | 265 | 468 | 980 | 1976 | 12451 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 14 | 20 | 14 | 14 | 20 | 14 | 14 | 20 | 14 | 14 | 20 | 20 | 20 | 20 | 20 | 133 | 132 | 21 |
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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