Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 1 am 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
26.9° C
0.4° 

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


Waimanalo surf forecast from 9 Aug 2026:

  • Most powerful swell: Saturday 15 Aug, 11PM (local time) - 10ft (3.0m), 13s period, ENE swell with 2,906 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 13s and forecast to arrive on Saturday (Aug 15) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Thursday (Aug 13) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Sat 15th Aug)10ft (3.0m) 13s

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


The Lowdown

G’day, Rusty here. Let’s get into it for Waimanalo. Most of this next couple of weeks looks pretty ordinary, with a long run of poor conditions and wind messing things up. But there’s one day, about a week out, that looks like a proper little window of magic, and that’s what we’re waiting for.

Water temp is sitting around 80°F, which is about normal for this time of year.

Right now, for the first week, from Sunday the 9th up to Saturday the 15th, it’s pretty much a bust. The swell is onshore from the ENE, with winds blowing 19 to 22 mph. The surf is there, between 4ft and 8ft, but the period is short, mostly 6 to 8 seconds, and it’s just messy, lumpy, and unappealing. The swell energy is weak to moderate, nothing that gets your heart racing. You’d be out there just getting battered.

Then Sunday the 16th, it gets bigger and ugly. Swell jumps to 10ft, with a period of 12-13 seconds, and the energy cranks up big time. But the wind swings to the north, blowing cross-onshore, so it’s a big, blown-out, lumpy mess. This is experts-only, and even then it won’t be any fun. Best to watch from the beach.

Now, here’s the one to circle. Monday the 17th. The wind finally does the right thing and goes offshore, light and clean. The morning has a light WSW breeze at 6 mph, and the swell is still solid at 8ft from the NE, with a period of 10 seconds. There’s a heap of energy in the water. This is when the break turns it on. It’s still a big day, so only experienced surfers should be out there. The afternoon backs off a little, dropping to around 7ft with an NNE swell and a gentle offshore breeze, still looking very good. This is the one window of quality in this entire stretch. Clean surf, good power, and a decent period. It’s a fairly consistent break, but it’s exposed, and with the clean offshore wind, it’s going to be the pick of the fortnight. Unfortunately, it doesn’t last.

After that, it’s back to the struggle. Tuesday the 18th sees the swell drop way down to under 3ft, and the wind goes light and cross-shore, messing up what little is there. From the 19th through to the 24th, it’s a mixed bag of poor to mediocre. The swell pulses between 2ft and 10ft, but the wind is stuck in the ENE and NE at 16 to 19 mph, keeping it onshore and choppy. The energy fluctuates, but the quality is never there. The last day, Sunday the 23rd, sees another pulse to 10ft, but it’s still onshore and messy.

So, there you have it. Don’t bother this week. The only real hope is Monday the 17th. Big, clean, offshore, and all yours if you’ve got the skills. Everything else is either too small, too messy, or too big and blown out. It’s a lean stretch, but that one day could be special.

Stay salty.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Sun morning. Warm (max 26°C on Mon morning, min 25°C on Sun morning). Mainly fresh winds.

Days 4-6 Weather Summary

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

Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
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)
1.7
ENE
7
1.6
ENE
7
1.7
ENE
7
1.5
E
8
1.4
ENE
8
1.5
E
7
1.5
E
7
1.3
ENE
7
1.5
E
6
1.3
ENE
6
1.5
ENE
6
1.5
E
6
1.5
ENE
6
1.6
ENE
6
1.8
ENE
7
1.8
ENE
7
1.8
ENE
8
2.1
ENE
9
2.3
ENE
11
2.5
ENE
11
3
ENE
13
Wave Graph
Metric surfscale
Energy kJ
278
292
301
258
226
238
225
181
176
117
160
182
170
201
285
349
398
651
1207
1503
2906
Wind (km/h)
30
ENE
30
ENE
30
ENE
25
ENE
30
ENE
25
ENE
30
ENE
30
ENE
30
ENE
35
ENE
30
ENE
30
ENE
35
NE
35
NE
35
ENE
35
ENE
30
ENE
30
ENE
35
NE
35
NE
25
NE
Wind State
on
on
cross-on
on
on
cross-on
cross-on
on
cross-on
on
on
on
on
on
on
on
on
on
on
on
on
High Tide
1:40PM0.72m
11:41PM0.30m
2:17PM0.74m
00:48AM0.34m
2:50PM0.74m
1:43AM0.37m
3:21PM0.72m
2:36AM0.40m
3:49PM0.69m
3:28AM0.42m
4:12PM0.63m
4:22AM0.43m
4:30PM0.58m
Low Tide
8:45PM0.24m
6:24AM-0.09m
8:55PM0.22m
7:12AM-0.10m
9:16PM0.20m
7:57AM-0.08m
9:41PM0.17m
8:39AM-0.03m
10:07PM0.14m
9:20AM0.03m
10:33PM0.12m
10:00AM0.11m
10:59PM0.09m
rain showers
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:07
6:07
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:05
7:04
7:02
7:02
7:01
7:00
7:00
 mm
1
Temp °C
25
25
25
26
26
26
26
26
25
25
25
26
26
26
25
25
25
26
26
26
25
Feels °C
24
23
24
26
25
26
25
24
23
24
23
24
24
24
23
22
22
25
25
24
22
  • 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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