Rivermouth_Wailuku Surf Break

Lat Long: 20.91° N 156.49° W

Rivermouth_Wailuku Surf Forecast and Surf Report

Issued: 7 am 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Rivermouth_Wailuku sea temperature is
26.6° C
0.2° 

Rivermouth_Wailuku surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Rivermouth_Wailuku surf forecast from 6 Aug 2026:

  • Most powerful swell: Sunday 9 Aug, 2PM (local time) - 5.5ft (1.7m), 8s period, ENE swell with 355 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 1.7m 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 0.4m 3s period and expected on Thursday (Aug 06) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Sun 9th Aug)5.5ft (1.7m) 8s

Table - best surf conditions forecast for Rivermouth_Wailuku over the next 16 days.


The Lowdown

Alright, let me break this down for you. It's Rusty here.

Rivermouth_Wailuku has a tough run ahead. The whole 16-day window is filled with poor surf conditions. Honestly, it's a bit of a bummer.

We kick off Wednesday the 5th of August with some small swell around 4ft from the ENE, with a period of 9 seconds. The combined energy is only moderate at 215. But the wind is out of the NE at 9 mph, which is a cross-onshore breeze, and that's making the surface fairly choppy. It's just not clean. This pattern of cross-onshore wind and poor conditions sticks with us day after day, right through to the end of the forecast on the 20th.

The water temperature is 80°F, which is about average for this time of year. Not too different.

The swell tries to build a bit around the 14th of August, with heights reaching 5ft to 5ft, and by the 16th and 17th we see 6ft. The combined energy jumps up into the strong range, hitting 562 on the 17th morning. But that cross-onshore wind just won't let up. It's a constant ENE breeze, sometimes picking up to 16 mph, which just chops everything up. The period sits mostly around 7-9 seconds, so it's not a long-period groundswell that could save the day. It's all poor surf.

There are literally no standout sessions here. The whole forecast is a big, flat, choppy mess. If you were hoping for a clean wave at Rivermouth_Wailuku, you're out of luck for the next two weeks. For a spot that's a fairly consistent reef setup, this is a real dry spell.

Hang in there. Forecasts change. But right now, I'm not telling you to go.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Wed morning, min 24°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Sun morning. Warm (max 27°C on Sat morning, min 25°C on Sat night). Wind will be generally light.

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
ENE
9
1.1
ENE
9
0.9
ENE
8
1.2
ENE
8
1.1
ENE
8
0.5
NE
8
0.9
ENE
5
1
ENE
6
1.2
ENE
7
1.2
ENE
7
1.3
ENE
7
1.7
ENE
7
1.7
ENE
8
1.6
ENE
8
1.5
E
8
1.4
ENE
7
1.4
ENE
7
1.4
ENE
7
1.1
ENE
7
1.1
ENE
7
1.2
E
7
Wave Graph
Metric surfscale
Energy kJ
207
194
108
172
131
28
44
67
135
147
176
255
336
308
258
199
199
193
136
136
146
Wind (km/h)
15
NE
15
NE
15
E
20
ENE
20
NE
15
ENE
15
ENE
15
ENE
20
ENE
20
ENE
20
NE
20
ENE
25
ENE
20
ENE
25
ENE
15
ENE
20
ENE
20
ENE
15
ENE
20
ENE
20
ENE
Wind State
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
8:17AM0.53m
4:59PM0.52m
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
Low Tide
12:37PM0.46m
1:32AM0.06m
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
part cloud
part cloud
clear
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:01
6:01
6:01
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:01
7:00
7:00
7:00
6:59
6:59
6:58
 mm
1
1
Temp °C
26
26
25
26
26
25
26
26
26
27
27
25
26
27
25
27
27
26
27
27
26
Feels °C
28
28
26
27
27
26
27
28
27
27
26
25
27
28
26
29
29
27
28
28
27
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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