Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 am 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
27.2° C
0.6° 

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


Duds Reef surf forecast from 7 Aug 2026:

  • Most powerful swell: Thursday 13 Aug, 2AM (local time) - 4.5ft (1.4m), 16s period, S swell with 1,029 kJ wave energy.

Best Forecast Surf Conditions for Duds Reef this week:

The most powerful waves expected at Duds Reef in the next 16 days are 1.4m 16s and forecast to arrive on Thursday (Aug 13) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 7s period and expected on Friday (Aug 07) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Thu 13th Aug)4.5ft (1.4m) 16s

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


The Lowdown

Alright, this is Rusty, and I’m looking at the outlook for Duds Reef. Let me tell you, it’s a tough stretch ahead. The name isn’t a joke right now.

We’re kicking off with a long, quiet period. From August 7th all the way through to August 19th, there’s basically nothing worth paddling out for. The wind is a constant cross-shore, mostly from the ENE, and it’s blowing fresh to strong at times. The swell is messy and weak, with the combined energy of all swells directed here sitting in the moderate range (211 to 596) for the first few days, but it doesn’t matter because the conditions are just poor. The water temperature is about 81°F, which is pretty normal for this time of year, so at least the water is warm.

By the 10th of August, Monday morning, we see a tiny pulse of 5ft swell from the ENE with a short period of 8 seconds, but it’s still cross-shore wind, and the energy climbs to a moderate 753. It’s only a marginal call, and the afternoon drops back off. Honestly, it’s a tease.

The real story is the grind. From the 11th through the 18th, the swell tries to build, with waves hitting 6ft to 6ft from the east on the 16th and 17th, but the wind never lets up. It’s cross-shore from the ENE at 18 to 25 mph, turning the surface into lumpy cross-chop. The energy values get strong, hitting over 1000 on the 13th, but it’s all for nothing. The break is a reef, but with that wind and short-period swell, it’s a mess. At 6ft, it’s getting too big for beginners, but with the conditions, it’s not even good for experts.

Then, finally, on the 20th of August, Thursday afternoon, the window cracks open. The wind goes glassy from the north, and the swell is 3ft from the ENE with a period of 8 seconds. The combined energy is a weak 252, but the glassy conditions make it surfable. This is the first solid chance to get a clean wave. It’s small, but it’s clean.

The standout, and the only real highlight in this whole forecast, is the 21st of August, Friday afternoon. The wind switches to a cross-offshore from the NE at just 3 mph, and the swell is 2ft from the SSW with a long period of 17 seconds. The combined energy (460) is moderate, but that long period means the wave quality will be better than the size suggests. It’s clean, and it’s a reef break, so it should handle that long-period swell better than a beach. Keep in mind, it’s inconsistent, so expect some waiting between sets.

Then, on the 22nd of August, Saturday afternoon, we get another glassy moment. The wind is calm from the NNW, and the swell is 2ft from the SW with a 16-second period. The energy is moderate (516), and the conditions are listed as "very good." This is a promising session, but it’s at the very end of the window, so it’s a bit of a long-range hope.

So, to sum it up: you’re waiting nearly two weeks for a clean wave. The only real standouts are the afternoon of the 21st and the 22nd of August. For the rest, it’s a cross-shore nightmare. The beach setup looks more like a kite-surfing session than a paddle session with that wind and chop. Don’t hold your breath on the rest.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 28°C on Fri afternoon, min 25°C on Fri morning). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Tue night). 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
1
0
0
0
0
0
0
1
1
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SW
21
0.4
SW
20
0.6
SSW
14
0.6
SSW
18
1.3
E
7
0.6
SSW
17
1.3
E
7
1.5
ENE
7
0.8
SSW
16
1.6
ENE
8
0.7
SSW
15
0.7
SSW
15
0.7
SSW
14
0.9
SSW
14
0.7
S
20
0.9
S
18
1
S
18
1.4
S
16
1.3
S
16
1.2
S
15
1.2
S
15
Wave Graph
Metric surfscale
Energy kJ
115
99
148
221
154
202
176
228
288
280
234
237
218
336
373
509
613
1029
858
653
636
Wind (km/h)
20
ENE
25
ENE
20
ENE
35
ENE
30
ENE
35
ENE
25
ENE
30
ENE
30
ENE
25
E
25
ENE
25
ENE
30
E
30
ENE
25
ENE
30
ENE
30
ENE
25
ENE
30
ENE
35
ENE
25
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
High Tide
12:14PM0.69m
10:37PM0.24m
1:11PM0.75m
00:30AM0.24m
2:00PM0.80m
1:39AM0.27m
2:43PM0.83m
2:33AM0.31m
3:23PM0.83m
3:22AM0.36m
3:59PM0.80m
4:08AM0.41m
4:32PM0.75m
4:55AM0.46m
Low Tide
8:48PM0.23m
9:04PM0.19m
6:05AM0.04m
9:29PM0.15m
7:07AM0.02m
9:56PM0.13m
8:02AM0.01m
10:23PM0.11m
8:53AM0.02m
10:50PM0.10m
9:42AM0.06m
11:15PM0.09m
clear
clear
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>
6:07
6:07
6:07
6:07
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:07
7:07
7:06
7:05
7:05
7:04
7:02
 mm
Temp °C
27
28
26
27
27
25
26
27
26
27
28
26
28
28
25
26
27
25
28
28
25
Feels °C
26
27
26
24
24
24
25
26
26
27
27
26
26
26
25
23
24
24
26
25
23
  • Map Icons:
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  • 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 Duds Reef Surf forecast

The above surf forecast table for Duds Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Duds Reef can be found by selecting the local surf guide option on the grey menu. Our Duds Reef 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 (Duds Reef) 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 Duds Reef 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.

Duds Reef is 0 km (0 miles) from 'Ewa Beach. If you plan a vacation in Oahu, look for hotels and other accommodation in 'Ewa Beach. 'Ewa Beach has rooms for a wide range of budgets as well as car hire and transport links.

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