Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 1 pm 08 Aug 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
26.8° 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 9 Aug 2026:

  • Most powerful swell: Saturday 15 Aug, 8PM (local time) - 11ft (3.5m), 9s period, ENE swell with 2,112 kJ wave energy.

Best Forecast Surf Conditions for Waimanalo this week:

The most powerful waves expected at Waimanalo in the next 16 days are 3.5m 9s and forecast to arrive on Saturday (Aug 15) 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 0.7m 18s period and expected on Wednesday (Aug 12) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Sat 15th Aug)11ft (3.5m) 9s

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


The Lowdown

Alright, Rusty here. Grab a coffee, because honestly, the next couple of weeks are a bit of a tough watch. Let's break it down.

The story for the next sixteen days is pretty grim for a paddle surfer. We’re looking at a long run of onshore winds and grovelly conditions. The water temp here is sitting around 80°F, which is bang on average for this time of year, so at least you won't be freezing while you watch the close-outs.

Right off the bat, from Saturday the 8th right through almost the entire first week, it’s all onshore ENE winds and poor surf. The swell is mostly in that 4 ft to 6 ft range, but with a short period of just 6 to 8 seconds, it’s just going to be a messy, lumpy wall of whitewater. The energy levels are weak to moderate (between 157 and 325), and the wind is blowing straight onshore. It’s going to be choppy and ugly. Honestly, through the week of the 8th to the 14th, you’re better off finding something else to do.

Now, things get a lot bigger, but not better. Around the 15th and 16th of August, we get a significant pulse. The swell jumps right up. On Saturday the 15th, we’re looking at a solid 10 ft to 12 ft ENE swell, but it’s thumping in with 25 mph NE winds. The combined energy hits 1320 and then 1759 – that’s strong, powerful stuff. But it’s blown to bits. The wind is howling. This is really only for the most hardcore, experienced chargers with a death wish. For a beginner, that’s way too big, and the conditions are hostile.

There is a single moment that almost saves the run. On Sunday afternoon, the 16th of August, the wind switches to a light cross-offshore breeze. The swell is still a massive 10 ft from the ENE (1321 energy). The file says the wind and tide are favorable, but honestly, even then, it’s a 10 ft close-out machine at a beach break. If you’re absolute top-tier, you might get one or two, but it’s still heavy-duty.

After that, the tail end of the second week from the 17th onward, the swell drops back down into that 5 ft to 7 ft range, but the wind stubbornly stays onshore from the ENE. It’s a classic case of the swell being there but the wind ruining it.

If we are being brutally honest, there is no standout session here for a surfer. The swell is either too small and windy, or too big and windy. For beginners: the entire period is not recommended. The few calm-ish moments come with waves over 8 ft, which are firmly in the expert zone. Honestly, looking at the persistent strong onshore winds and the significant swell, this setup looks a lot more interesting for a kite surfer than a paddle surfer at Waimanalo.

This is a rough one, folks. It just seems to be the way it is right now. Let's hope things change.

Rusty.

Short Range Forecast

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

Days 5-7 Weather Summary

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

Sat
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
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)
1.5
ENE
6
1.6
ENE
6
1.6
ENE
7
1.6
ENE
8
1.7
ENE
7
1.5
E
7
1.6
ENE
8
1.5
E
7
1.4
ENE
7
1.5
E
7
1.5
E
6
1.3
ENE
7
1.5
ENE
6
1.7
E
6
1.7
ENE
7
1.9
ENE
7
2
ENE
7
2.3
ENE
7
2.5
ENE
8
3
E
8
Wave Graph
Metric surfscale
Energy kJ
172
225
245
273
285
251
273
238
208
238
182
152
165
247
261
316
371
558
711
1041
Wind (km/h)
30
ENE
30
ENE
30
ENE
30
NE
30
ENE
25
NE
30
ENE
25
ENE
25
ENE
30
ENE
25
ENE
30
ENE
35
ENE
35
ENE
35
ENE
35
ENE
40
ENE
35
ENE
35
NE
35
NE
Wind State
on
cross-on
on
on
cross-on
on
on
cross-on
cross-on
on
cross-on
cross-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
Low Tide
5:29AM-0.07m
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
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
<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
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:05
7:05
7:04
7:02
7:02
7:01
7:00
 mm
Temp °C
26
25
25
26
25
26
26
26
26
26
25
25
26
26
26
26
26
25
26
26
Feels °C
24
23
24
25
24
25
25
26
25
24
22
23
24
24
24
23
24
22
23
24
  • Map Icons:
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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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