Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 7 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
27.2°C
0.3° 

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


Waimanalo surf forecast from 13 Sep 2026:

  • Most powerful swell: Thursday 17 Sep, 8PM (local time) - 8ft (2.4m), 10s period, ENE swell with 1,021 kJ wave energy.

Best Forecast Surf Conditions for Waimanalo this week:

The most powerful waves expected at Waimanalo in the next 16 days are 2.4m 10s and forecast to arrive on Thursday (Sep 17) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 18s period and expected on Wednesday (Sep 16) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Thu 17th Sep)8ft (2.4m) 10s

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


The Lowdown

Alright, my friends, Rusty here again. Let me break down the next couple of weeks on this coast in feet and miles per hour for you.

To be straight with you, the outlook is a real bummer. Every single session in the 16-day window is showing "poor surf conditions." That’s a long dry spell, and around here, a blank stretch like this is just part of the deal sometimes.

The only spot on the map is Waimanalo. It’s an exposed, beginner-friendly beach break that’s fairly consistent and works best when the swell is from the Northeast. The water is a warm 81°, which is pretty average for this time of year.

The main problem is the wind. It’s blowing onshore from the ENE or NE the entire time. We never get that sweet, clean offshore breeze. The swell direction is mostly from the ENE or NE, not the ideal straight NE, and the periods are real short and punchless, mostly under 8 seconds.

Starting Saturday the 12th through Sunday the 13th, the surf is tiny and weak. Swell heights are under 3ft with onshore winds blowing 9-12 mph. The wave energy is low. You’d be fighting bumps on waves barely breaking.

From Monday the 14th to Tuesday the 15th, it's more of the same—small waves around 2-3ft—and the wind turns cross-onshore, making it choppy. It’s just poor.

By Wednesday the 16th and Thursday the 17th, the swell actually starts to build. By Thursday afternoon we’re looking at a 7-8ft ENE swell with 8-10 second periods and the energy jumps into a strong range. But the wind is a nasty onshore 22 mph from the NE. That much wind on that much swell at a beach break is going to turn it into a total washing machine. Honestly, that setup would be way more fun for a kite surfer than a paddle surfer.

The rough, onshore pattern sticks around through the rest of the period. Then on Friday the 27th, the whole chart changes. The swell direction swings to a long-period NNW groundswell at 17 seconds, and the energy goes through the roof (968-1443). The forecast wave height is a manageable 3-4ft for that kind of groundswell. The problem? The wind is still a solid 15 mph onshore from the ENE. A long-period swell like that holds a ton of power, and it’s usually best on a point or reef. At a beach break like Waimanalo with that wind, you’ll see long, cleanup sets roll through, but the stuff in between will be a mess.

That’s the story. For the next two weeks, there’s not a single day I could call a standout. If you’re itching for a surf, maybe keep an eye on that long-period pulse on the 27th, but don’t get your hopes up. Forecasts can always change for the better, but right now, this coastline is best left alone.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Sat afternoon, min 25°C on Sat morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Thu night. Warm (max 26°C on Tue morning, min 25°C on Tue morning). Mainly fresh winds.

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
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)
0.8
ENE
10
0.9
NE
9
0.9
NNE
9
0.9
NNE
9
0.9
NE
9
0.9
NE
9
0.8
NE
8
0.7
NE
8
0.7
NE
8
0.7
NNE
8
1
ENE
5
1
ENE
5
1.5
ENE
6
1.5
ENE
6
1.9
ENE
7
2.2
ENE
8
2.3
ENE
10
2.3
ENE
9
1.9
ENE
9
1.8
ENE
9
1.8
E
8
Wave Graph
Metric surfscale
Energy kJ
128
115
135
138
112
123
82
69
67
51
53
58
141
181
319
540
959
808
572
505
450
Wind (km/h)
15
ENE
20
NE
15
ENE
15
ENE
20
NE
20
ENE
25
ENE
20
NE
20
ENE
20
ENE
25
NE
25
ENE
35
NE
35
NE
35
ENE
35
NE
35
NE
30
ENE
20
E
20
E
15
ENE
Wind State
on
on
cross-on
on
on
on
cross-on
on
on
cross-on
on
on
on
on
on
on
on
cross-on
cross-on
cross-on
on
High Tide
3:07PM0.55m
4:11AM0.55m
3:19PM0.50m
4:57AM0.55m
3:24PM0.45m
5:47AM0.53m
3:20PM0.41m
6:53AM0.51m
2:37PM0.40m
8:54AM0.49m
10:52AM0.51m
Low Tide
9:09AM0.14m
9:26PM0.05m
9:50AM0.20m
9:48PM0.03m
10:35AM0.25m
10:11PM0.03m
11:26AM0.30m
10:35PM0.05m
12:57PM0.34m
11:02PM0.07m
11:41PM0.10m
1:18AM0.13m
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:16
6:16
6:16
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:36
6:35
6:34
6:34
6:32
6:31
6:30
 mm
4
4
4
2
Temp °C
25
26
25
25
25
25
25
25
25
26
26
26
26
26
26
26
26
26
26
26
26
Feels °C
25
26
25
26
25
24
24
24
25
27
26
26
25
25
26
24
25
25
27
27
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
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