Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 1 pm 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
27.0°C
0.1° 

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


Waimanalo surf forecast from 5 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 8PM (local time) - 5ft (1.5m), 10s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Saturday 5 Sep, 2AM (local time) - 7ft (2.2m), 14s period, ENE swell with 1,868 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 8 Sep, 8PM (local time) - 5ft (1.5m), 10s period with ENE swell.

Best Forecast Surf Conditions for Waimanalo this week:

The surf forecast for Waimanalo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 8PM. The primary swell is predicted to be 1.5m and 10s period with a secondary swell of 0.7m and 14s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Waimanalo in the next 16 days are 2.2m 14s and forecast to arrive on Saturday (Sep 05) 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 1.2m 8s period and expected on Tuesday (Sep 08) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Tue 8th Sep)5ft (1.5m) 10s
Best Surf 8PM (Tue 8th Sep)5ft (1.5m) 10s
Most Powerful 2AM (Sat 5th Sep)7ft (2.2m) 14s

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


The Lowdown

Alright, Rusty here. Let's take a look at what's on the menu for the next couple of weeks.

Straight up, I'm looking at Waimanalo and it's a tough stretch. The wind is the main problem – it's locked in from the east-northeast, blowing onshore or cross-onshore for most of the forecast, and it's usually a fresh breeze. That's going to trash the surface. The water is sitting at 81°, which is pretty much what you'd expect for this time of year, so we can't blame the cold for the lack of action.

For the first week, it's a write-off. We've got a solid pulse of swell arriving on the 5th of September, with waves around 7 ft pushing in from the east-northeast. The combined energy is strong (1539), but that onshore wind is just going to make it a messy, blown-out mess. The swell period drops from 14 seconds early on to 8 seconds by the 9th, so the quality is going downhill fast. You'd be better off with a kite than a paddle board for most of this.

We get a slight reprieve around Tuesday the 8th and Wednesday the 9th. Swell drops to 6 ft from the east-northeast (energy 761), and the wind swings to a light cross-offshore from the south-southeast. That will clean it up a bit, but it's still only marginal. The swell period is down to 10-8 seconds, so it'll be a bit short and fat. Not a standout, just a chance to get wet if you're desperate.

Then we're back into the wind. From the 9th right through to the 18th of September, it's a long stretch of poor conditions. The wind is relentless, the swell is mixed up but mostly short-period, and the energy is weak to moderate (between 249 and 577). This is a solid blank run.

The best chance in the whole window, and I mean the *only* real standout, is looking like Saturday the 19th of September. It's a long way off, so keep that in mind, but the models are showing a bit of hope. The wind drops to a light breeze from the east at 6 mph, making it a light cross-onshore. The swell is 7 ft from the east-northeast with a period of 9 seconds, and the combined energy is moderate (749). It's still a bit of a gamble that far out, but if the wind stays light, Waimanalo could have some clean, punchy waves. For a beginner, that 7 ft might be a bit much, but for the rest of us, it's the only window worth watching.

Rusty.

Short Range Forecast

Moderate rain (total 12mm), heaviest on Sun night. Warm (max 26°C on Fri afternoon, min 25°C on Fri afternoon). Mainly fresh winds.

Days 5-7 Weather Summary

Light rain (total 9mm), mostly falling on Mon afternoon. Warm (max 27°C on Mon afternoon, min 25°C on Wed night). Winds increasing (light winds from the SSE on Tue night, fresh winds from the ENE by Wed night).

Fri
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
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
1
0
2
2
1
2
2
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)
1.2
E
14
2.2
ENE
14
2.1
ENE
14
2.1
ENE
13
2.2
ENE
13
1.9
ENE
12
1.8
ENE
12
2
E
12
1.6
E
13
2.2
ENE
13
2.1
ENE
12
2
ENE
11
1.7
ENE
10
1.3
ENE
9
1.4
ENE
8
1.3
ENE
8
1.7
ENE
7
1.6
ENE
7
1.7
ENE
7
1.6
ENE
7
Wave Graph
Metric surfscale
Energy kJ
577
1868
1519
1496
1568
1100
960
1175
851
1497
1247
921
625
282
256
201
297
265
289
265
Wind (km/h)
30
ENE
30
ENE
30
ENE
30
NE
25
ENE
30
ENE
25
ENE
15
E
25
E
25
SE
30
SSE
25
S
15
SSE
5
SSE
20
ENE
30
ENE
35
ENE
30
ENE
35
ENE
25
ENE
Wind State
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross-on
on
cross-on
cross-on
on
cross-on
High Tide
11:56AM0.64m
12:39PM0.68m
11:21PM0.29m
1:14PM0.70m
00:23AM0.35m
1:44PM0.70m
1:12AM0.41m
2:10PM0.68m
1:57AM0.46m
2:33PM0.65m
2:42AM0.50m
Low Tide
2:48AM0.04m
4:19AM0.02m
8:00PM0.22m
5:27AM-0.01m
7:55PM0.20m
6:20AM-0.02m
8:07PM0.17m
7:05AM-0.01m
8:24PM0.14m
7:47AM0.03m
8:43PM0.10m
clear
clear
clear
clear
rain showers
part cloud
cloud
mod rain
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
rain showers
rain showers
clear
part cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:15
6:15
6:15
6:15
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:44
6:43
6:42
6:40
6:39
6:38
6:37
 mm
1
9
2
2
2
2
1
1
1
Temp °C
26
25
26
26
25
26
26
25
26
27
27
27
27
27
26
26
25
25
25
25
Feels °C
22
22
24
24
24
25
25
25
27
27
27
28
28
31
28
26
24
22
22
22
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  • 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 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.

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