Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 1 am 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
26.9° 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 7 Aug 2026:

  • Most powerful swell: Sunday 9 Aug, 11PM (local time) - 7ft (2.1m), 7s period, ENE swell with 397 kJ wave energy.

Best Forecast Surf Conditions for Waimanalo this week:

The most powerful waves expected at Waimanalo in the next 16 days are 2.1m 7s and forecast to arrive on Sunday (Aug 09) 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 (Sun 9th Aug)7ft (2.1m) 7s

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


The Lowdown

Alright, Rusty here. Let me tell you how it's looking for the next couple of weeks.

Honestly, mate, I'm a bit gutted to say it, but the outlook for Waimanalo is a long, frustrating stretch of "poor surf conditions." We're looking at a solid 16-day window with no real green lights. The consistent onshore wind from the ENE is just killing it, with a strong breeze gusting up to 25 mph at times, which is going to shred any chance of clean faces. The swell is on the rise, but it's all windswell with a short, choppy period, so it's just messy.

The first real pulse of energy comes in around August 10th, where the swell starts to build, but the wind is still cranking onshore. By August 15th and 16th, the combined energy kicks up to strong levels (439 on Saturday, 612 on Sunday), with waves pushing 7 ft to 7 ft. But again, it's all onshore slop. The water temp is sitting around 80°, which is about normal for this time of year, but you won't care about the water temp when you're getting battered by that wind.

The biggest swell event looks like it's building toward August 17th and 18th, with the combined energy hitting a massive 829 on the 17th. That's a lot of power in the water, but with a short period and onshore wind, it's going to be a washing machine. For a beginner-friendly break like Waimanalo, waves over 5 ft start to get hairy, and anything over 8 ft is expert-only, but the wind is the real problem here. If you're a kite surfer, this setup is going to be way more interesting than a paddle session.

There's a slight glimmer on August 19th, where the wind finally drops to a gentle breeze, but the swell is dropping and the period is still short. It's a long wait for nothing. This is a tough run, folks. The forecast can always change, but as it stands, I'd say give it a miss and wait for a better window.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

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

Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
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)
0.9
ENE
5
1.1
ENE
5
1.4
ENE
6
1.4
ENE
6
1.5
E
6
1.9
ENE
7
1.7
ENE
7
1.7
ENE
7
2
ENE
7
1.6
E
8
1.4
ENE
8
1.6
E
7
1.5
E
7
1.6
ENE
7
1.5
E
6
1.5
E
6
1.5
ENE
6
1.6
ENE
6
1.5
E
6
1.6
ENE
6
1.8
ENE
7
Wave Graph
Metric surfscale
Energy kJ
37
50
135
165
188
316
278
302
382
316
251
277
245
245
194
182
160
205
182
218
308
Wind (km/h)
25
ENE
30
ENE
30
ENE
35
ENE
30
ENE
35
ENE
30
NE
35
NE
30
ENE
30
ENE
25
NE
30
ENE
25
ENE
30
ENE
30
ENE
35
ENE
30
ENE
30
ENE
35
ENE
35
ENE
35
ENE
Wind State
on
on
cross-on
on
on
cross-on
on
on
cross-on
on
on
cross-on
cross-on
on
cross-on
on
on
cross-on
on
on
on
High Tide
12:18PM0.61m
1:01PM0.68m
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
Low Tide
4:25AM-0.03m
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
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:05
6:07
6:07
6:07
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:06
7:05
7:05
7:04
7:02
7:02
7:01
 mm
Temp °C
25
26
25
26
26
25
25
25
25
26
26
26
26
26
25
25
25
26
26
26
26
Feels °C
25
26
24
24
24
23
23
23
24
25
25
26
25
24
23
22
22
25
24
24
23
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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