Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 7 am 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
27.0°C
0.1° 

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


Waimanalo surf forecast from 5 Sep 2026:

  • Best quality surf: Wednesday 9 Sep, 5AM (local time) - 4.5ft (1.3m), 9s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Saturday 5 Sep, 8PM (local time) - 7ft (2.2m), 14s period, ENE swell with 1,730 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 4.5ft (1.3m), 9s period with ENE swell.

Best Forecast Surf Conditions for Waimanalo this week:

The surf forecast for Waimanalo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 09) at 5AM. The primary swell is predicted to be 1.3m and 9s period with a secondary swell of 0.7m and 13s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Waimanalo in the next 16 days are 2.2m 14s and forecast to arrive on Saturday (Sep 05) 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 1.0m 7s period and expected on Tuesday (Sep 08) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 9th Sep)4.5ft (1.3m) 9s
Best Surf 5AM (Wed 9th Sep)4.5ft (1.3m) 9s
Most Powerful 8PM (Sat 5th Sep)7ft (2.2m) 14s

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


The Lowdown

Alright, Rusty here. Let me break down the surf outlook for Waimanalo.

Right off the bat, I gotta be honest with you – the next two weeks look pretty grim. We've got a solid 16-day window, but the first few days are a total write-off. From Saturday, September 5th right through to the end of the first week, the conditions are just not there. The wind is howling from the ENE at 18.6 mph, blowing straight onshore, and it's making a mess of things. The swell is coming in at 7.2ft with a short period, and the combined energy is a strong 1725, but it's all for nothing with that wind. It's poor surf, full stop.

We don't see anything worth paddling out for until Tuesday, September 8th. Even then, it's only marginal. The surf will be around 6.6ft from the ENE with a period of 11 seconds, but the wind swings to the south, coming cross-offshore. That'll clean things up a bit. The energy is moderate (991). It's not a standout, but it's the best we've got in the first week. For a beginner break, this 6.6ft swell might be a bit much, and the water temp is 80.6°, which is about average for the time of year.

After that, it's back to poor conditions. There's a long stretch of onshore ENE winds and weak, short-period swell. The energy drops right off into the low hundreds. There's no real quality on offer for the rest of the forecast period. The second week is a total write-off with consistent onshore wind and tiny, weak swell. Honestly, nothing comes together. This is a bleak run.

Short Range Forecast

Heavy rain (total 22mm), heaviest during Sun night. Warm (max 27°C on Mon night, min 25°C on Sat morning). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 6mm), mostly falling on Tue afternoon. Warm (max 27°C on Tue morning, min 25°C on Thu morning). Mainly fresh winds.

Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
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
2
1
1
2
1
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)
2.2
ENE
14
2.2
ENE
13
2.1
ENE
13
1.9
ENE
12
2
E
12
2.2
ENE
12
1.6
E
13
1.5
E
12
2.1
ENE
12
2
ENE
11
1.8
ENE
11
1.4
ENE
10
1.2
ENE
8
1.3
ENE
8
1.3
ENE
8
1.5
ENE
7
1.3
ENE
7
0.8
ENE
13
1.5
ENE
12
1.5
ENE
12
1.4
ENE
11
Wave Graph
Metric surfscale
Energy kJ
1705
1679
1430
1118
1155
1338
848
694
1200
991
732
370
207
206
191
236
167
229
656
603
460
Wind (km/h)
30
ENE
30
NE
20
ENE
30
ENE
25
ENE
25
E
25
E
20
E
30
SE
30
S
25
S
15
SSE
15
SE
15
E
20
E
25
ENE
20
ENE
25
ENE
20
ENE
25
ENE
20
ENE
Wind State
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
on
High Tide
11:56AM0.64m
12:39PM0.68m
11:21PM0.29m
1:14PM0.70m
00:23AM0.35m
1:44PM0.70m
1:12AM0.41m
2:10PM0.68m
1:57AM0.46m
2:33PM0.65m
2:42AM0.50m
2:52PM0.60m
3:26AM0.53m
Low Tide
4:19AM0.02m
8:00PM0.22m
5:27AM-0.01m
7:55PM0.20m
6:20AM-0.02m
8:07PM0.17m
7:05AM-0.01m
8:24PM0.14m
7:47AM0.03m
8:43PM0.10m
8:28AM0.08m
9:04PM0.07m
clear
clear
rain showers
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
rain showers
rain showers
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:15
6:15
6:15
6:15
6:16
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:43
6:42
6:40
6:39
6:38
6:37
6:37
 mm
1
2
12
3
3
1
1
2
1
2
Temp °C
26
26
25
26
26
26
26
26
27
27
27
27
27
27
26
25
25
25
25
26
25
Feels °C
25
25
24
26
26
26
26
26
27
27
27
29
30
29
27
24
24
25
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)
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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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