Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 1 pm 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
26.7°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 11 Sep 2026:

  • Most powerful swell: Thursday 17 Sep, 2PM (local time) - 7ft (2.1m), 8s period, ENE swell with 563 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 8s and forecast to arrive on Thursday (Sep 17) 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 0.4m 18s period and expected on Wednesday (Sep 16) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Thu 17th Sep)7ft (2.1m) 8s

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


The Lowdown

Alright folks, Rusty here. Let's have a look at what's cookin' for Waimanalo.

Well, I gotta be straight with you – this 16-day window is a tough one. We're looking at a pretty blank run to start. The first real shot of any decent surf energy isn't showing up until Thursday the 17th of September, so that leaves us with a gap of nearly a week with nothing worth paddling out for. The wind is the problem, plain and simple. For Waimanalo, which needs a clean offshore from the SW, we're getting hammered by a relentless cross-onshore and onshore flow from the ENE and NE for the entire forecast. That's gonna chop everything up into a messy, lumpy burger.

The water temp is sitting at a normal 80°, so nothing weird there.

Even when the swell starts showing up on the 17th, it's a strong easterly swell with a combined energy of (607) on the Thursday morning, building to (636) by the afternoon. That's a lot of juice, but with those winds it's going to be a washing machine. This is a classic case of "looks better for kite surfing than paddle surfing" – the conditions are just too blown out.

The pick of a very ugly bunch comes later on, around Tuesday the 22nd and Wednesday the 23rd of September. The winds ease up a little, and we get an easterly swell hanging around 6ft with a moderate period of 10 seconds. The combined energy is still chunky at (705) on Tuesday morning and (663) in the afternoon, but the wind goes to a moderate cross-onshore and choppy state. It's not glassy, but it's the cleanest it will get. The swell direction from the ENE is completely wrong for Waimanalo's optimum SW direction, so you're fighting the wind and the swell angle. It's not a standout for quality, it's a standout for being the only thing that's surfable without needing a death wish.

So, to sum it up: The first week is a write-off. The second week has energy, but the conditions will be rough. If you're desperate and you can handle a battle, the 22nd and 23rd of September are your only real window. Otherwise, wait for the trade winds to back off.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Fri night). Mainly fresh winds.

Days 5-7 Weather Summary

Mostly dry. Warm (max 26°C on Tue morning, min 24°C on Sun night). Mainly fresh winds.

Thu
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
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)
1.6
ENE
7
1.4
ENE
7
1.1
E
7
1.2
ENE
11
1
E
10
0.9
ENE
10
0.9
NE
9
0.9
NNE
9
0.9
NNE
9
1
NE
9
1
NE
9
1.1
NE
8
1.1
NE
8
1.1
NE
8
1
NE
8
0.9
ENE
7
1.1
NE
7
1.9
ENE
7
1.8
ENE
7
2.1
ENE
7
Wave Graph
Metric surfscale
Energy kJ
247
181
113
350
216
160
125
135
138
155
145
156
149
149
108
75
128
336
340
469
Wind (km/h)
30
ENE
25
ENE
25
ENE
20
ENE
20
ENE
20
ENE
20
NE
20
ENE
20
ENE
20
ENE
20
ENE
25
NE
25
NE
15
NE
20
ENE
25
NE
30
ENE
35
ENE
35
ENE
35
ENE
Wind State
on
cross-on
on
on
cross-on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
High Tide
2:33PM0.65m
2:42AM0.50m
2:52PM0.60m
3:26AM0.53m
3:07PM0.55m
4:11AM0.55m
3:19PM0.50m
4:57AM0.55m
3:24PM0.45m
5:47AM0.53m
3:20PM0.41m
6:53AM0.51m
2:37PM0.40m
Low Tide
8:43PM0.10m
8:28AM0.08m
9:04PM0.07m
9:09AM0.14m
9:26PM0.05m
9:50AM0.20m
9:48PM0.03m
10:35AM0.25m
10:11PM0.03m
11:26AM0.30m
10:35PM0.05m
12:57PM0.34m
11:02PM0.07m
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:16
6:16
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:37
6:36
6:35
6:34
6:34
6:32
 mm
Temp °C
26
25
25
25
25
25
25
25
25
25
25
25
25
25
26
26
26
26
26
25
Feels °C
25
24
24
24
25
25
25
25
25
24
24
25
25
25
27
26
26
25
25
24
  • 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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