Waimanalo Surf Break

Lat Long: 21.35° N 157.70° W

Waimanalo Surf Forecast and Surf Report

Issued: 7 am 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Waimanalo sea temperature is
26.4° 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 21 Jul 2026:

  • Most powerful swell: Monday 27 Jul, 11PM (local time) - 5.5ft (1.7m), 14s period, E swell with 1,147 kJ wave energy.

Best Forecast Surf Conditions for Waimanalo this week:

The most powerful waves expected at Waimanalo in the next 16 days are 1.7m 14s and forecast to arrive on Monday (Jul 27) 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 0.5m 14s period and expected on Tuesday (Jul 21) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Mon 27th Jul)5.5ft (1.7m) 14s

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 is a tough one to write. We’ve got a full 16-day window, and honestly, it’s a bit of a dry spell for Waimanalo. The whole outlook is a bust, I’m calling it now. The waves are there, but the conditions just aren’t cooperating.

The first few days, starting Tuesday the 21st through the weekend, it’s all onshore and cross-onshore wind. Tuesday morning brings a weak 4ft ENE swell with a short period of 7 seconds – the wave energy is low, sitting at 200. It’s blown out by a 16 mph wind, so it’s just messy. Wednesday and Thursday get a bit bigger, up to 7ft, but the wind picks up to 22 mph, turning it into a lumpy, cross-onshore mess. That kind of wind and size makes it a kite surfer’s playground, not a paddle surfer’s. The water temp is 80°, which is about normal for this time of year.

We do get a spike in energy around the 26th and 27th – a long-period groundswell rolls in from the E, with periods hitting 15 and 16 seconds and energy readings of 977 and 1171. That’s a decent amount of juice, but it’s a long-period swell like that, which tends to break too straight and fat on a beach break like Waimanalo. And still, the wind is onshore from the NE, 16-19 mph, so it’s never clean. No standouts here.

The last week of July and into early August is more of the same. The swell sticks around, but the wind is relentless. By the 28th, there’s a brief glimmer with a lighter 9 mph NNW wind, and the guidance says the break is fairly consistent and exposed to swell, but it’s still a “marginal” call. It’s not good enough to get excited about.

For the first week of August, the swell gets bigger, hitting 8ft on the 1st, but it’s back to strong cross-onshore winds. That’s expert-only territory in these conditions, and even then, it’s not fun. The whole setup is more interesting for the kite crowd.

So, bottom line: there are no good surf options in this 16-day window. For Waimanalo, a blank run like this isn’t unheard of when the trade winds lock in. It’s a bummer, but forecasts can change. Hang tight.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Tue morning. Warm (max 25°C on Tue morning, min 24°C on Wed night). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Fri morning. Warm (max 25°C on Fri morning, min 24°C on Fri morning). Mainly strong winds.

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
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
7
1.1
NE
7
1.3
ENE
7
1.6
ENE
7
1.5
ENE
6
1.5
ENE
6
2
ENE
7
1.8
ENE
7
2.1
ENE
7
1.9
ENE
7
2
ENE
7
2
ENE
7
2
ENE
8
1.9
NE
8
2.1
ENE
8
1.1
E
15
1.3
E
16
1.5
E
16
1.5
E
14
1.5
E
14
1.7
E
14
Wave Graph
Metric surfscale
Energy kJ
158
118
162
232
183
145
330
268
385
358
412
440
452
423
531
563
827
1060
928
915
1130
Wind (km/h)
25
ENE
25
ENE
20
E
35
ENE
30
ENE
30
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
25
NE
30
NE
30
ENE
25
ENE
25
NE
25
ENE
Wind State
on
on
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
on
on
cross-on
on
on
on
High Tide
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
2:52PM0.65m
00:49AM0.31m
Low Tide
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
6:51AM-0.04m
9:22PM0.23m
rain showers
part cloud
part cloud
rain showers
clear
rain showers
clear
clear
clear
rain showers
clear
part cloud
clear
clear
rain showers
part cloud
clear
rain showers
rain showers
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
6:00
6:00
6:00
6:01
6:01
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:14
7:14
7:13
7:13
7:13
7:12
7:12
 mm
1
1
1
2
2
1
1
Temp °C
25
25
25
25
25
24
25
25
24
25
25
24
25
25
25
24
25
25
24
25
25
Feels °C
25
24
25
23
22
22
22
22
21
22
22
21
23
23
23
22
23
23
22
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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