Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 7 am 29 Aug 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
27.0°C
0.2° 

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


Waimanalo surf forecast from 29 Aug 2026:

  • Most powerful swell: Saturday 5 Sep, 2PM (local time) - 10ft (3.0m), 8s period, ENE swell with 1,318 kJ wave energy.

Best Forecast Surf Conditions for Waimanalo this week:

The most powerful waves expected at Waimanalo in the next 16 days are 3.0m 8s and forecast to arrive on Saturday (Sep 05) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 16s period and expected on Wednesday (Sep 02) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Sat 5th Sep)10ft (3.0m) 8s

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


The Lowdown

Alright, folks, Rusty here. Let’s be straight with you—this is a tough one for the island. We’re looking at a 16-day window that’s almost entirely a write-off for anything worth paddling out for. The pattern is locked in: strong, onshore ENE winds, short-period chop, and just messy, poor surf conditions day after day. The water is sitting at 81° which is about average for this time of year, so no surprises there.

The situation at Waimanalo is grim. From Saturday, August 29th right through the first week of September, it’s a solid block of no-go. The swell is on the small side, 5 ft to 7 ft, but it’s all wind-driven with a short period around 6 to 8 seconds, and the combined energy is mostly weak to moderate (between 298 and 475). The wind is either onshore or cross-onshore, blowing 18 to 25 mph, making it choppy and ugly. The forecast says "poor surf conditions" for every single session. There’s nothing to recommend. This is a long stretch with zero decent options.

We do see a spike in size around September 5th and 6th, with swell heights hitting 10 ft to 16 ft, and the combined energy ramping way up into the strong range (1014 to 5766). But don’t get excited. The swell direction swings to the E, with a slightly longer period of 9 to 11 seconds, but it’s still blowing strong cross-onshore winds at 18 to 28 mph. The energy is there, but it’s a total mess. For a beginner spot like Waimanalo, that’s way too big, and for experts, the wind is just going to tear it apart. Honestly, with that much wind and size, this setup looks more interesting for kite surfing than paddle surfing.

The second week, from September 8th to the 13th, the same story continues. The swell drops back to 5 ft to 8 ft, periods are short to moderate (7 to 9 seconds), and the wind is still onshore or cross-onshore from the ENE or E. The combined energy ranges from 397 to 1170, so moderate to strong, but it’s all wind-affected. Again, "poor surf conditions" across the board. There’s not a single standout session in this entire outlook.

To sum it up: there’s no surf worth chasing here. The whole 16-day run is a blank. It’s a real bummer, but in this part of the world, when the trade winds lock in like this, these flat, windy stretches are pretty normal. Keep your board in the bag, maybe check the forecast in a few days—things can change. But for now, it’s a no-go.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Sun night. Warm (max 26°C on Sun afternoon, min 25°C on Sat morning). Mainly strong winds.

Days 4-6 Weather Summary

Some drizzle, heaviest during Tue night. Warm (max 26°C on Tue morning, min 24°C on Thu night). Mainly fresh winds.

Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
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)
1.5
ENE
6
1.6
ENE
6
2
ENE
7
1.9
ENE
7
1.8
ENE
7
1.7
ENE
7
1.9
ENE
7
1.9
ENE
7
1.9
ENE
8
1.8
ENE
8
2
ENE
8
2.1
ENE
8
1.7
ENE
8
1.7
ENE
8
2.1
ENE
7
1.8
ENE
8
1.7
ENE
7
1.7
ENE
7
2.1
ENE
7
1.9
ENE
7
2.3
ENE
7
Wave Graph
Metric surfscale
Energy kJ
172
207
405
358
316
248
397
387
419
392
471
541
354
354
444
383
294
294
401
376
581
Wind (km/h)
35
ENE
35
ENE
40
ENE
40
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
30
ENE
30
ENE
30
ENE
35
ENE
30
ENE
35
ENE
30
NE
35
ENE
35
ENE
40
ENE
Wind State
on
on
cross-on
cross-on
on
cross-on
on
on
cross-on
on
on
on
on
on
cross-on
on
on
on
on
on
on
High Tide
3:30PM0.60m
3:52AM0.48m
3:45PM0.56m
4:44AM0.51m
3:57PM0.51m
5:44AM0.52m
4:04PM0.47m
7:03AM0.52m
3:54PM0.43m
9:02AM0.54m
10:54AM0.59m
Low Tide
8:54AM0.07m
9:52PM0.09m
9:33AM0.13m
10:17PM0.05m
10:16AM0.20m
10:46PM0.03m
11:06AM0.27m
11:19PM0.02m
12:22PM0.33m
00:03AM0.02m
1:10AM0.03m
2:48AM0.04m
clear
clear
part cloud
clear
clear
rain showers
rain showers
clear
clear
clear
clear
rain showers
clear
clear
part cloud
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:13
6:13
6:13
6:13
6:13
6:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:49
6:47
6:47
6:46
6:45
6:45
6:44
 mm
1
1
1
Temp °C
25
25
25
25
26
25
25
26
25
26
25
25
26
26
25
25
25
25
25
26
25
Feels °C
22
22
22
22
23
22
22
24
22
24
23
22
25
24
23
22
23
22
21
23
21
  • 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 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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