Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 1 pm 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
27.1°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 24 Aug 2026:

  • Most powerful swell: Tuesday 25 Aug, 11AM (local time) - 6.5ft (2.0m), 7s period, E swell with 382 kJ wave energy.

Best Forecast Surf Conditions for Waimanalo this week:

The most powerful waves expected at Waimanalo in the next 16 days are 2.0m 7s and forecast to arrive on Tuesday (Aug 25) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 17s period and expected on Thursday (Aug 27) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11AM (Tue 25th Aug)6.5ft (2.0m) 7s

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


The Lowdown

Imperial

Alright, let’s talk in feet and miles per hour. The next couple of weeks are looking pretty grim for a proper paddle, I gotta be honest. We’ve got a real flat spell on the horizon, but there’s a glimmer of something much bigger way out there if you’re patient.

So, the first thing you need to know: there’s really nothing to surf right now. We’re looking at a solid stretch of poor surf conditions from the start all the way through to the end of September 1st. That’s a long, boring gap, nearly two weeks of onshore rubbish and wonky swell. The wind is just a nightmare – a solid 19 to 22 mph from the ENE, hammering the coast. It’s not just onshore, it’s often cross-onshore, making for lumpy, choppy, and pretty much un-rideable conditions. The swell that does show up is short-period stuff, mostly 6 to 7 seconds, which just doesn’t have any push or shape. The combined energy is weak to moderate, with numbers like 270 up to 382, but it’s all wasted because of the wind. Water temp is sitting at 81°F, which is about average for the time of year, not that you’ll be in the water much.

The first real chance of anything comes on the morning of September 1st. The swell bumps up a bit to 8 ft from the ENE, with a period stretching to 9 seconds. That gives us a combined energy of 785, which is solid moderate. But the wind is still a fresh 22 mph onshore. It’s still poor surf conditions, but it’s a change. For a beginner spot like Waimanalo (Oahu), this is getting too big – anything over 5 ft is a handful for beginners, and this is pushing 8 ft. The wind is not doing it any favours.

The real standout, the one that’s got me talking, is the weekend of September 5th and 6th. Check this out: on the 5th, we’ve got 7 ft of swell from the ENE, but the period jumps to 12 seconds. That’s a proper groundswell! The combined energy is a massive 1181 and 1187 – that’s strong wave energy. The wind is still onshore from the NE at 16-19 mph, but it’s a cleaner onshore, not the cross-onshore trash we’ve been dealing with.

Then on September 6th, it gets serious. The swell hits 10 ft from the ENE with a very long period of 12 seconds. The combined energy is a beastly 2360. That is a lot of ocean energy. But here’s the catch: Waimanalo is a beach break. A long-period swell like this, over 11 seconds, can break too straight on a beach and be a bit closed out. It’s also over 8 ft, so that’s expert territory only. It might be a better look for the reefs or points on the North Shore, but that’s not what we’re looking at here. The wind is still a fresh 19 mph onshore. It’s a massive, powerful, dangerous swell, but the conditions are still not clean. I’d say it’s a promising but less certain look for the real experienced crew, but for the average surfer, this is a stay-on-the-beach kind of day. The crowds at Waimanalo can be an issue sometimes, so keep that in mind if you’re even thinking about it.

The week after that, from the 7th, the swell drops back to a more manageable 8 ft with a 9-second period, and the wind eases to a moderate 16 mph onshore. Better, but still not great.

So, to sum it up: the first two weeks are a write-off. The weekend of the 5th and 6th of September has the biggest, most powerful swell of the window, but it’s raw, windy, and only for experts. That’s the best on offer, but it’s a far cry from perfect.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Sun night). Mainly fresh winds.

Days 5-7 Weather Summary

Some drizzle, heaviest during Fri night. Warm (max 26°C on Fri morning, min 25°C on Wed afternoon). Mainly fresh winds.

Sun
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
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)
1.7
ENE
6
2
E
6
1.8
E
6
1.7
E
7
1.6
E
7
2
E
7
1.9
ENE
7
1.7
E
7
1.6
ENE
7
1.5
ENE
7
1.5
ENE
6
1.3
E
6
1.3
ENE
6
1.3
E
6
1.2
E
6
1.6
ENE
6
1.7
ENE
6
1.8
ENE
7
1.6
ENE
7
1.8
ENE
7
Wave Graph
Metric surfscale
Energy kJ
227
345
259
250
240
382
362
270
232
187
170
126
134
135
101
197
253
268
212
268
Wind (km/h)
35
NE
35
ENE
35
ENE
25
ENE
30
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
30
ENE
25
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
Wind State
on
on
on
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
11:46PM0.30m
1:55PM0.63m
00:27AM0.33m
2:17PM0.65m
1:04AM0.37m
2:38PM0.65m
1:42AM0.40m
2:57PM0.65m
2:22AM0.43m
3:14PM0.63m
3:05AM0.46m
3:30PM0.60m
3:52AM0.48m
Low Tide
8:24PM0.22m
6:03AM0.02m
8:21PM0.21m
6:39AM-0.00m
8:32PM0.20m
7:12AM-0.01m
8:49PM0.18m
7:45AM-0.00m
9:08PM0.15m
8:18AM0.02m
9:29PM0.12m
8:54AM0.07m
9:52PM0.09m
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
rain showers
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:11
6:11
6:11
6:13
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:53
6:53
6:52
6:52
6:51
6:50
6:49
 mm
1
Temp °C
26
26
26
26
26
26
26
25
25
25
25
25
25
25
26
25
25
25
25
25
Feels °C
24
25
26
25
26
24
24
22
21
21
22
23
23
22
24
23
22
21
22
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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