
Surf Forecasts:
Rivermouth_Wailuku surf forecast from 15 Jul 2026:
- Most powerful swell: Saturday 18 Jul, 11PM (local time) - 5ft (1.5m), 8s period, E swell with 309 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 1.5m 8s and forecast to arrive on Saturday (Jul 18) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 15s period and expected on Wednesday (Jul 15) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sat 18th Jul) | 5ft (1.5m) 8s |
Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.
The Lowdown
G’day, Rusty here, and I’ve gotta be straight with you – we’re looking at a pretty ordinary stretch ahead. The only break on the radar is Rivermouth_Wailuku, a reef set-up that’s *fairly consistent*, but the conditions are just not playing ball. Over the next 16 days, there’s not a single moment where I’d say “get the board and go.” The whole period is a write-off for decent surf.
Starting Wednesday 15 July, we’ve got some clouds and rain showers, with a cross-onshore wind at 9 mph. The swell is a weak 3 ft from the ENE, with a short period of 7 seconds, and the combined energy is a low 108 (weak). It’s poor surf – choppy and messy. That sets the tone.
Through Thursday 16 and Friday 17 July, the wind picks up a bit to 12 mph, still cross-onshore, and the swell hangs around 3 ft to 4 ft, with period still a short 6 to 7 seconds. Energy builds a little to 134 and 226, but it’s still in the weak to moderate range. The water is about average for this time of year, nothing unusual. The break is *often* crowded, but honestly, with these conditions, even the crowds won’t be stoked.
Saturday 18 July stays clear, but the wind is moderate cross-onshore at 12 mph, and the swell is 4 ft to 5 ft, period at 8 seconds. Combined energy hits 318 (moderate), but the quality is still described as “poor surf conditions.” It’s a beach-and-reef setup, and with the cross-onshore breeze, it’s looking more like a kite-surfing session than a paddle one.
The pattern continues right through to the end of July. Each day brings a cross-onshore wind (mostly ENE at 9 to 12 mph), with swell heights between 3 ft and 5 ft, and periods mostly stuck at 6 to 8 seconds – short-period windswell. The combined energy ranges from 139 to 516, but it’s never enough to overcome the chop. Even on Monday 27 July, when the period jumps to 14 seconds (a long-period groundswell), the energy spikes to 516, but the wind is still cross-onshore at 12 mph, and the swell height is only 3 ft – that long period will just make the sets more spaced out and the break too straight for a beach setup. Not ideal.
By Tuesday 28 July, we see a 13-second period swell at 4 ft, with energy at 615 (strong), but the wind is still cross-onshore at 12 mph, reinforcing the poor surf call. The optimum swell direction for this reef is NNE, but we’re getting ENE and E swells – not matching up, which is a killer.
There is no standout period. No day where the wind turns offshore, no glassy morning, no clean lines. The entire 16-day window is a bust. Occasionally, when a break is *fairly consistent* like this one, you can hope for a change, but here it’s just a blank run of poor conditions. The forecast confidence is high for the near term, and it’s not looking good. For the second week, the same story holds – small, short-period, cross-onshore junk.
Sorry, mates. Keep the boards in the shed. This one’s a dud.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Wed afternoon. Warm (max 26°C on Wed afternoon, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sat morning, min 24°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | NE 7 | ENE 7 | ENE 7 | NE 7 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | E 6 | E 6 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
121 | 84 | 86 | 136 | 86 | 149 | 115 | 101 | 163 | 101 | 120 | 257 | 309 | 270 | 256 | 212 | 165 | 134 | 108 | 117 | 132 | |
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 | 2:24AM0.41m | 4:02PM0.91m | 3:17AM0.43m | 4:36PM0.86m | 4:10AM0.44m | 5:06PM0.79m | 5:09AM0.44m | 5:32PM0.71m | 6:19AM0.44m | 5:51PM0.62m | 7:53AM0.45m | 6:01PM0.55m | 10:04AM0.50m | 5:44PM0.49m | |||||||
Low Tide | 10:12PM0.24m | 8:40AM-0.15m | 10:46PM0.22m | 9:23AM-0.08m | 11:19PM0.20m | 10:04AM0.02m | 11:52PM0.18m | 10:44AM0.13m | 00:26AM0.16m | 11:26AM0.26m | 1:00AM0.14m | 12:18PM0.37m | 1:38AM0.12m | 2:16PM0.46m | |||||||
— | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | |
7:09 | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | |
mm | — | — | 2 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 |
Feels °C | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 25 | 26 | 26 | 25 | 27 | 26 | 25 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | NE 7 | N 7 | N 8 | NE 7 | NNE 7 | W 14 | N 7 | N 8 | WNW 14 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | W 12 | W 12 | W 12 | W 12 | E 14 | E 13 | E 12 |
121 | 24 | 45 | 136 | 48 | 103 | 28 | 29 | 63 | 40 | 29 | 27 | 31 | 19 | 11 | 11 | 10 | 11 | 16 | 55 | 45 | |
Swell 2 Height (m) Direction Period (s) | E 8 | W 15 | W 15 | W 15 | W 14 | WSW 17 | WNW 14 | WNW 14 | SW 16 | WNW 13 | WNW 13 | WNW 13 | WNW 13 | W 12 | W 20 | W 19 | SW 18 | SW 18 | SW 17 | SW 17 | SW 17 |
18 | 112 | 109 | 109 | 106 | 29 | 67 | 66 | 10 | 60 | 34 | 34 | 33 | 11 | 7 | 7 | 13 | 12 | 11 | 11 | 11 | |
Swell 3 Height (m) Direction Period (s) | WNW 15 | WSW 18 | WSW 18 | WSW 16 | WSW 16 | W 17 | WSW 17 | SW 16 | SW 12 | SW 16 | SW 15 | SW 15 | SW 14 | W 20 | S 14 | S 13 | S 12 | E 16 | W 11 | W 11 | W 11 |
73 | 30 | 31 | 25 | 26 | 6 | 29 | 10 | 5 | 10 | 9 | 8 | 8 | 8 | 4 | 3 | 3 | 5 | 10 | 2 | 2 | |
Wind waves Height (m) Direction Period (s) | — | ENE 7 | ENE 7 | — | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | E 6 | E 6 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
— | 84 | 86 | — | 86 | 149 | 115 | 101 | 163 | 101 | 120 | 257 | 309 | 270 | 256 | 212 | 165 | 134 | 108 | 117 | 132 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 14 | 14 | 5 | 20 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 5 | 20 | 5 | 5 | 14 | 5 | 5 | 5 |
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.











