Rivermouth_Wailuku Surf Break

Lat Long: 20.91° N 156.49° W

Rivermouth_Wailuku Surf Forecast and Surf Report

Issued: 7 am 22 Jul 2026 (local time)

Forecast update in  hr  min

Today's Rivermouth_Wailuku sea temperature is
26.5° C
0.4° 

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 23 Jul 2026:

  • Most powerful swell: Wednesday 29 Jul, 2AM (local time) - 8ft (2.4m), 12s period, ENE swell with 1,569 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 2.4m 12s and forecast to arrive on Wednesday (Jul 29) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 19s period and expected on Thursday (Jul 23) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Wed 29th Jul)8ft (2.4m) 12s

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


The Lowdown

Alright folks, Rusty here with a look at the local scene. Let’s be straight with you – we’ve only got one spot on the radar for this whole 16-day stretch, and it’s a tough one. Rivermouth_Wailuku is a reef break, and it's exposed to the swell, but the numbers are telling a pretty grim story overall.

The water temperature is sitting at 80°, which is about normal for this time of year, so no surprises there.

The first real chance of anything that isn't a total write-off comes around the morning of Tuesday, 28 July. The conditions are still marginal, with a 6ft swell from the east, but the wind clocks around to the north-northeast at 9 mph, putting it onshore. The combined energy is strong at 1241, so there’s some power in the water, but the wind is going to mess with the surface. It’s really only a question mark for the die-hards.

The next bit of hope comes mid-week on Wednesday, 29 July. The afternoon session offers a 7ft swell from the east-northeast with a period of 10 seconds, and the wind drops to a light northwesterly at 6 mph. That’s a gentle cross-onshore breeze, which will keep it reasonably clean. The energy is still strong (1042). This is the standout of the window. The swell size is getting up there, so it’s more for the experienced crew. The optimum swell direction is from the north-northeast, so this east-northeast swell is a little off-angle, but the drop in wind makes it the best bet. It’s a reef break, so it should handle the longer period okay.

After that, we’re back into a long, long stretch of poor conditions. The wind stays cross-onshore or onshore, and the wave quality is just not there. It’s a real grind from Thursday, 30 July, all the way through to the end of the window on Thursday, 6 August. The swell dips and rises, but the wind never cooperates, leaving us with choppy, lumpy, and generally unappealing surf. There’s a gap of about a week and a half with nothing really worth paddling out for.

So, to sum it up: the only real standout is Wednesday afternoon, 29 July, at Rivermouth_Wailuku. It’s not perfect, but it’s the cleanest we’ll see. The rest of the 16 days is a blank. Don’t hold your breath.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Thu night. Warm (max 27°C on Fri afternoon, min 24°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Sat morning, min 23°C on Sun night). Wind will be generally light.

Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
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
1
0
0
2
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
ENE
7
1.5
ENE
12
1.1
E
12
1.7
ENE
6
1.6
ENE
6
1.6
ENE
6
1.7
ENE
7
1.7
ENE
7
1.6
ENE
8
1.7
ENE
8
1.7
ENE
8
1.6
NE
8
1
E
15
1.2
E
15
1.3
E
14
1.4
E
14
1.5
E
13
1.6
E
13
1.7
E
13
1.8
E
13
2.4
ENE
12
Wave Graph
Metric surfscale
Energy kJ
166
583
333
233
195
195
256
301
294
365
339
291
418
602
668
711
780
875
956
1087
1569
Wind (km/h)
20
ENE
20
ENE
20
E
20
E
25
ENE
20
ENE
20
ENE
25
ENE
20
ENE
20
NE
20
NE
20
E
20
ENE
25
ENE
15
ENE
20
ENE
20
NE
15
ENE
15
NE
25
NE
10
NE
Wind State
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
on
on
on
High Tide
11:40AM0.58m
12:27PM0.64m
1:01PM0.69m
1:30PM0.73m
11:19PM0.34m
1:58PM0.77m
00:18AM0.37m
2:25PM0.80m
1:02AM0.40m
2:52PM0.82m
1:41AM0.43m
Low Tide
3:23AM0.09m
4:25AM0.06m
5:21AM0.03m
8:39PM0.32m
6:07AM-0.01m
8:45PM0.30m
6:47AM-0.04m
9:01PM0.27m
7:24AM-0.07m
9:22PM0.25m
clear
part cloud
clear
clear
clear
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:56
5:56
5:56
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:07
7:07
7:07
7:07
7:07
7:06
7:06
 mm
1
3
Temp °C
26
26
25
26
26
25
26
27
25
26
26
25
26
26
25
25
26
25
27
27
25
Feels °C
26
26
25
25
25
24
25
27
25
26
25
25
26
25
25
25
25
25
28
27
26
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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