Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 1 pm 14 Aug 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
27.1° C
0.5° 

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


Waimanalo surf forecast from 15 Aug 2026:

  • Most powerful swell: Sunday 16 Aug, 5AM (local time) - 16ft (5.0m), 10s period, E swell with 5,404 kJ wave energy.

Best Forecast Surf Conditions for Waimanalo this week:

The most powerful waves expected at Waimanalo in the next 16 days are 5.0m 10s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 7s period and expected on Sunday (Aug 16) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5AM (Sun 16th Aug)16ft (5.0m) 10s

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


The Lowdown

Alright folks, Rusty here, sittin' in the sand at Waimanalo. Let's talk about the next couple of weeks.

It's a tough one for us on the east side. If you're looking for clean, glassy waves, you're gonna be waiting a while. The wind is the big story here, and it's not a good one. We're looking at a long stretch of onshore and cross-onshore winds that are going to leave the surface pretty messy. The water temp is sitting at 81°, which is pretty normal for this time of year, so at least you won't be freezing while you're getting blown around.

The surf is going to start building through the weekend, but it's not going to be pretty. Friday the 14th and Saturday the 15th see the swell climbing from 7 ft up to a solid 12 ft, but it's all coming from the ENE and E with a short, weak period of only 8-9 seconds. The onshore wind is howling at 22-31 mph, so it's going to be a messy, blown-out mess. The wave energy is moderate to strong (500 to 1727), but it's all wind chop. Honestly, this looks more like a kitesurfing setup than a paddle surf situation.

We roll into Sunday the 16th with the biggest swell of the run, a 13 ft wave from the East, and the energy is massive (2502). But the wind is still cross-onshore and the surface is lumpy. This is strictly for the experts, and even then, it's a battle. The conditions are just "poor" across the board.

It's a long, flat spell after that. From Monday the 17th right through to the end of the week, we're looking at tiny, weak waves, barely 3 ft, with the wind still on it. The energy drops right off (135 to 336). The only positive is that a few windows are labelled "clear" with the wind directly onshore, but it's still fresh and won't be clean.

The next week doesn't look much better. The last weekend of August and into the first days of September, the swell picks up a little, but it's still short period and windy. The only glimmer of hope is around the 27th and 28th of August. We see a long-period groundswell appear, a 4 ft wave from the East with a period of 17-18 seconds. That's a serious amount of energy (1383) and it's a groundswell, which means better shape. The morning of the 28th gets a score of 2/10, best of the whole run. The wind is a light breeze from the East, which is cross-on, but it's the cleanest it's going to get. This is a long way out, so treat it as a promising but uncertain prospect. The rest of that period is just marginal at best.

So, to be blunt, there's no standout session here. The best bet is to keep an eye on Thursday the 27th and Friday the 28th for that long-period groundswell, but don't get your hopes up for anything clean. It's a rough run for the ol' beach.

Stay patient, check the cams, and don't force it.

Rusty.

Short Range Forecast

Heavy rain (total 33mm), heaviest during Sun morning. Warm (max 27°C on Sun afternoon, min 25°C on Fri afternoon). Winds decreasing (gales from the ENE on Sat night, light winds from the ESE by Sun afternoon).

Days 5-7 Weather Summary

Mostly dry. Warm (max 25°C on Mon afternoon, min 25°C on Mon afternoon). Mainly fresh winds.

Fri
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
ENE
8
2.5
ENE
8
3
ENE
8
3.5
E
10
5
E
10
3.5
E
9
2.5
E
8
2.1
ENE
8
1.7
ENE
8
1.6
ENE
7
1.4
ENE
7
1.1
ENE
7
1.1
ENE
7
1.2
ENE
7
1.3
ENE
7
1.2
ENE
7
1.3
ENE
7
0.8
E
8
0.9
E
7
1.1
E
8
Wave Graph
Metric surfscale
Energy kJ
534
916
1334
1971
4368
1849
941
520
310
252
168
118
114
164
158
140
173
71
86
142
Wind (km/h)
40
ENE
40
NE
50
ENE
50
ENE
65
ENE
35
ESE
20
ESE
20
E
30
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
20
ENE
20
NE
20
ENE
25
ENE
20
NE
15
NE
Wind State
on
on
on
on
on
cross
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
on
on
on
on
on
on
High Tide
4:12PM0.63m
4:22AM0.43m
4:30PM0.58m
5:20AM0.44m
4:40PM0.52m
6:27AM0.44m
4:40PM0.47m
8:02AM0.45m
4:17PM0.43m
10:23AM0.47m
11:48AM0.51m
Low Tide
10:33PM0.12m
10:00AM0.11m
10:59PM0.09m
10:41AM0.19m
11:25PM0.08m
11:25AM0.27m
11:52PM0.07m
12:27PM0.33m
00:26AM0.08m
1:15AM0.09m
2:41AM0.09m
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
clear
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
7:00
6:59
6:58
6:58
6:57
 mm
2
2
8
13
5
3
Temp °C
26
25
25
26
26
26
27
26
25
25
25
25
25
25
25
25
25
25
25
25
Feels °C
23
23
22
21
20
23
29
27
24
24
24
24
24
25
24
25
25
25
25
26
  • 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
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Waimanalo:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Waimanalo surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


Information about the Waimanalo Surf forecast

The above surf forecast table for Waimanalo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waimanalo can be found by selecting the local surf guide option on the grey menu. Our Waimanalo 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 (Waimanalo) 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 Waimanalo 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.

Waimanalo is 7 km (4 miles) from Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.

Nearest locationNearest