
Surf Forecasts:
Rivermouth_Wailuku surf forecast from 3 Aug 2026:
- Most powerful swell: Tuesday 4 Aug, 2PM (local time) - 5ft (1.6m), 11s period, ENE swell with 550 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 11s and forecast to arrive on Tuesday (Aug 04) 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 12s period and expected on Sunday (Aug 09) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Tue 4th Aug) | 5ft (1.6m) 11s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what we've got coming up.
Right off the bat, I gotta be straight with ya—this ain't looking good for a paddle. For the entire 16-day run, it's pretty much the same story, and it’s not a happy one for surfers. We've got a constant cross-onshore wind from the ENE, mostly 6 to 18 mph. That’s going to keep things choppy, bumpy, and flat-out messy.
The only break in the mix is Rivermouth Wailuku, a reef setup. The water temp is sitting at about 80°, which is about average for this time of year, with a tiny anomaly of 0.5°. So, nothing weird going on there.
Kicking off Monday, August 3rd, we've got some swell around 4 ft to 5 ft from the ENE, but with that cross-on breeze, the wave comment calls it "poor surf conditions." There's some moderate wave energy behind it (381), but it doesn't matter when the wind's trashing it.
Tuesday the 4th sees the swell stick around 5 ft to 5 ft, still from the ENE. The period bumps up to 11 seconds on Tuesday morning, which would normally be a good sign of a groundswell, but with the wind still cross-onshore, it’s just a "marginal" call. Combined energy climbs to 523 on Tuesday afternoon, but again, the wind is the enemy here.
Wednesday the 5th drops off a bit to 4 ft to 4 ft, and the energy falls to 215. Still that same cross-on muck. From Thursday the 6th onward, it's a real grind. Swell heights bounce around between 2 ft and 7 ft, but every single entry is flagged as "poor surf conditions." The period is short, mostly 6 to 9 seconds, which is weak, wind-swell stuff.
By the second week, into mid-August, things actually get a bit bigger. On the 15th and 16th, we see swell around 5 ft to 6 ft, and the combined energy spikes over 600 on the 15th morning. Then on the 17th, we hit 7 ft with energy over 500. But it’s still all cross-onshore, with winds up to 18 mph making it lumpy. That size with that wind? That’s more a kite-surfing setup than a clean wave for the rest of us.
Honestly, there’s not one standout day in this whole stretch. The wind never lets up. If you’re desperate, maybe the Tuesday the 4th morning had the most potential with that longer 11-second period, but the conditions are still poor.
So, what’s the call? For the next two weeks, I’d save the energy and give the board a rest. The surf just isn't on.
Rusty.
Short Range ForecastSome drizzle, heaviest during Wed night. Warm (max 27°C on Mon morning, min 25°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 27°C on Fri morning, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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 11 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph | |||||||||||||||||||||
234 | 267 | 495 | 460 | 521 | 325 | 207 | 244 | 169 | 43 | 131 | 97 | 105 | 101 | 166 | 208 | 254 | 286 | 335 | 335 | 266 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | 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 | 4:58PM0.65m | 6:31AM0.50m | 5:07PM0.58m | 8:17AM0.53m | 4:59PM0.52m | 10:35AM0.60m | 11:51AM0.70m | 12:37PM0.79m | 10:03PM0.34m | 1:16PM0.86m | 11:50PM0.37m | ||||||||||
Low Tide | 10:39AM0.24m | 11:58PM0.11m | 11:22AM0.35m | 00:37AM0.08m | 12:37PM0.46m | 1:32AM0.06m | 2:47AM0.04m | 4:09AM0.00m | 8:44PM0.33m | 5:19AM-0.05m | 8:26PM0.30m | ||||||||||
6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
— | 7:02 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | 1 | — | 1 | 1 |
Temp °C | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 29 | 29 | 28 | 29 | 28 | 28 | 28 | 27 | 28 | 27 | 27 | 26 | 27 | 28 | 25 | 26 | 26 | 25 | 27 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | E 13 | E 12 | ENE 11 | ENE 11 | W 13 | ENE 10 | NNE 9 | NNE 8 | NNE 8 | ENE 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NE 9 | NE 9 | N 6 | NE 10 | NE 9 | W 12 | NE 9 |
119 | 104 | 495 | 460 | 13 | 325 | 8 | 7 | 6 | 43 | 12 | 11 | 10 | 10 | 31 | 31 | 3 | 14 | 14 | 26 | 13 | |
Swell 2 Height (m) Direction Period (s) | N 6 | N 8 | W 12 | W 11 | N 10 | N 9 | W 12 | W 12 | W 12 | NNW 8 | N 7 | NE 11 | W 10 | NE 12 | NNW 7 | N 7 | WSW 18 | WSW 18 | WSW 17 | WSW 16 | W 12 |
18 | 5 | 11 | 2 | 2 | 7 | 11 | 11 | 11 | 7 | 4 | 5 | 2 | 21 | 5 | 4 | 31 | 30 | 27 | 26 | 24 | |
Swell 3 Height (m) Direction Period (s) | N 8 | W 12 | W 18 | SW 17 | SW 17 | W 12 | SW 16 | SW 16 | SW 16 | N 8 | W 12 | W 12 | W 21 | SW 20 | WSW 19 | WSW 18 | SW 13 | N 6 | W 11 | S 12 | WSW 16 |
10 | 11 | 6 | 11 | 11 | 12 | 10 | 10 | 9 | 5 | 11 | 11 | 9 | 15 | 37 | 33 | 7 | 3 | 9 | 3 | 25 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | — | — | ENE 11 | — | ENE 9 | ENE 9 | ENE 8 | ENE 5 | ENE 8 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 |
234 | 267 | — | — | 521 | — | 207 | 244 | 169 | 37 | 131 | 97 | 105 | 101 | 166 | 208 | 254 | 286 | 335 | 335 | 266 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 12 | 5 | 5 | 5 | 5 | 5 | 14 | 5 | 14 | 14 | 14 | 14 | 20 | 14 | 14 | 14 | 14 | 14 | 14 | 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.











