Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 1 am 20 Jul 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
26.4° 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 20 Jul 2026:

  • Most powerful swell: Sunday 26 Jul, 5AM (local time) - 5ft (1.5m), 17s period, E swell with 1,216 kJ wave energy.

Best Forecast Surf Conditions for Waimanalo this week:

The most powerful waves expected at Waimanalo in the next 16 days are 1.5m 17s and forecast to arrive on Sunday (Jul 26) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 16s period and expected on Monday (Jul 20) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5AM (Sun 26th Jul)5ft (1.5m) 17s

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


The Lowdown

Alright folks, Rusty here. Let’s be straight with you – this outlook is a tough one. We’re looking at a long, drawn-out stretch of poor surf with nothing to get excited about for a good ten days.

The whole period kicks off with a persistent onshore wind from the ENE, which is exactly the wrong direction for Waimanalo. That wind is going to be chopping everything up, making it pretty much unrideable. The swell is small and weak, with combined wave energy barely cracking 200 (199 on Monday morning) and even that drops with a short, weak period around 7-8 seconds. There’s just no energy in the water, and the wind is a mess.

We’ll see a bit of a rise in swell size by Thursday, July 23rd, with waves up to 6 ft, but it’s still onshore with a fresh breeze, and the energy (367) is still moderate but messy. That trend continues right through the weekend, with waves hitting 7 ft on Friday July 24th and Saturday July 25th, but the wind is still howling from the ENE at 22 mph, making it lumpy, choppy, and just plain ugly. The combined energy does climb to 785 and even 1009, but without good wind, it’s all for nothing.

The only glimmer of hope comes later, and it’s a long way off. On Sunday, July 26th, we see a classic groundswell from the E with a very long period of 16 seconds. The swell drops back to 5 ft, but the energy is massive – 1567 – meaning there’s real power. The problem is, the wind is still onshore from the NE at 16 mph. That’s a tough one. That long-period groundswell will be breaking straight and fast at Waimanalo, which is a beach break. It’s really only going to be workable for experts on a very good day if the wind eases off.

The real standout, if you can call it that, is the morning of Wednesday, July 29th. The swell is 7 ft from the ENE with a period of 11 seconds, and the wind is a light breeze from the NE at only 6 mph. The combined energy is a solid 963. This is the one window where conditions might be borderline okay. The wind is light and onshore, but at 6 mph it’s not going to destroy the wave face. For a beginner spot like Waimanalo, 7 ft is getting a bit big, so it’s more for the experienced crew. The water temperature is sitting at 80°, which is about average for the time of year, so no need for a thick wetsuit.

Honestly, for the first 10 days, the setup looks more interesting for kite surfing than paddle surfing. The wind is consistent and the swell is decent, but for a surfer, it’s a write-off. After that, the long-range promise on the 26th and 29th is there, but it’s a long wait and far from certain. Keep an eye on the wind, because that’s the only thing that could turn this around.

Rusty.

Short Range Forecast

Moderate rain (total 12mm), heaviest on Tue night. Warm (max 26°C on Mon morning, min 24°C on Wed morning). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Thu morning. Warm (max 25°C on Thu morning, min 24°C on Fri night). Mainly strong winds.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
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)
1.3
ENE
8
1.4
ENE
7
1.5
ENE
7
1.4
ENE
7
1.3
ENE
7
1.6
ENE
7
1.5
ENE
7
1.4
ENE
6
1.6
ENE
6
1.7
ENE
7
1.9
ENE
6
2
ENE
7
2.1
ENE
7
2.1
ENE
7
2.1
ENE
7
2.1
ENE
8
2.1
NE
8
1.4
E
17
1.5
E
16
1.5
E
16
1.6
E
15
Wave Graph
Metric surfscale
Energy kJ
199
207
210
176
153
220
189
145
207
268
280
360
408
456
482
517
517
1111
1144
1101
1145
Wind (km/h)
20
NE
25
NE
25
ENE
15
ENE
30
ENE
25
E
35
ENE
30
ENE
35
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
35
ENE
25
ENE
35
ENE
25
ENE
25
ENE
25
NE
25
ENE
Wind State
on
on
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
on
on
cross-on
cross-on
on
cross-on
cross-on
on
on
on
on
cross-on
High Tide
9:13AM0.37m
6:04PM0.45m
11:19AM0.44m
4:59PM0.41m
12:21PM0.51m
12:58PM0.56m
1:29PM0.59m
1:57PM0.62m
10:51PM0.28m
2:25PM0.63m
00:03AM0.30m
Low Tide
12:37PM0.29m
2:03AM0.07m
3:19PM0.35m
2:49AM0.05m
3:43AM0.04m
4:39AM0.02m
5:29AM-0.00m
9:26PM0.24m
6:12AM-0.02m
9:10PM0.23m
clear
clear
rain showers
rain showers
rain showers
rain showers
part cloud
clear
rain showers
rain showers
clear
clear
clear
clear
part cloud
rain showers
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
6:00
6:00
6:00
6:01
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:14
7:14
7:14
7:13
7:13
7:13
7:12
 mm
2
2
2
5
1
1
1
Temp °C
26
26
25
26
26
25
25
25
25
25
25
25
25
25
25
25
25
25
24
25
25
Feels °C
26
25
24
27
25
24
22
22
23
22
21
22
23
22
22
24
22
22
23
23
23
  • 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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