Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
27.2°C
0.3° 

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 30 Aug 2026:

  • Most powerful swell: Friday 4 Sep, 11PM (local time) - 10ft (3.0m), 9s period, E swell with 1,575 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 3.0m 9s and forecast to arrive on Friday (Sep 04) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Fri 4th Sep)10ft (3.0m) 9s

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


The Lowdown

Alright, Rusty here again. Let’s not sugarcoat it – the outlook for Duds Reef is a long, tough stretch. We’re looking at a 16-day window where the surf just isn’t cooperating. Expect a gap of about a week and a half before anything even remotely worthwhile shows up.

The energy is present, but the wind is the enemy. Starting Sunday, August 30th, we’ve got a fresh cross-shore wind from the ENE at 22 mph, tearing up a weak 1.6m easterly swell. The combined swell energy is moderate at 565, but it’s all chopped up and lumpy. This same story repeats day after day – Monday, August 31st, is the same deal: 1.6m of ENE swell with a 574 energy reading, but still those nasty cross-shore winds.

We get a weird shift on Tuesday, September 1st. The swell drops to a tiny 0.7m, but the period jumps to a very long 18 seconds, and the direction swings to the SSW. The combined energy spikes to 777 (moderate), and the wind is still a fresh cross-shore. That long period groundswell needs a point or reef to wrap around, and Duds is a reef, so it’s technically the right setup. But the size is tiny, and the cross-shore wind will make it bumpy. Skip it.

The second week doesn’t bring much relief. Around September 7th, we see a spike in energy – Monday afternoon brings a 1.9m ENE swell with a 12-second period, and the combined energy is a massive 2496 (strong!). The wind is a fresh cross-offshore, meaning the face might be clean. That’s the best we’ll see all fortnight, but it’s still only a marginal option. The size is pushing 6ft, so it’s for intermediate surfers and up.

By Wednesday, September 9th, the swell is back up to 3.0m from the ENE with a 10-second period, and the combined energy hits a whopping 3096 (very strong). The wind finally drops to a light breeze, but it’s cross-on in the morning and onshore in the afternoon. That’s a cleanup disaster. That size is for experts only – over 8ft – and at a beach break, that long period will make it a closeout wall. Honestly, that setup looks more interesting for kite surfing than paddle surfing.

The very end of the window, September 14th, is just a whisper. A 0.5m, 21-second period southwest groundswell with a gentle breeze. It’s a pretty, clean-looking line, but there’s no power behind it. Combined energy is only 485.

So, the honest truth? There’s no standout. The best shot is the Monday afternoon on September 7th – 1.9m, 12-second ENE groundswell with a cross-offshore wind. It’s the only time the wind gives you a break. Otherwise, park the board and wait for the next cycle.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 27°C on Sun morning, min 25°C on Sun morning). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Fri night. Warm (max 28°C on Wed afternoon, min 25°C on Wed night). Winds increasing (moderate winds from the ENE on Wed night, strong winds from the ENE by Fri night).

Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
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
0
0
0
0
0
0
0
0
0
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)
0.7
SSW
16
1.4
E
7
0.7
SSW
15
1.5
E
7
1.6
ENE
8
0.6
S
19
0.7
SSW
18
1.6
ENE
8
0.9
S
17
1
S
16
0.9
S
16
0.9
S
15
0.8
S
14
0.8
S
14
1.7
E
8
2.2
E
8
2.5
E
8
3
E
9
1.9
SSE
10
1.7
E
8
1.5
E
8
Wave Graph
Metric surfscale
Energy kJ
226
198
199
225
273
273
329
318
465
520
401
347
268
250
365
619
1068
1476
702
412
302
Wind (km/h)
35
ENE
35
ENE
25
ENE
35
ENE
30
ENE
25
ENE
30
ENE
30
ENE
20
ENE
30
ENE
30
ENE
25
ENE
40
ENE
35
NE
40
ENE
40
NE
40
ENE
50
ENE
30
E
20
ESE
20
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross
cross
cross
cross-on
cross
High Tide
4:56PM0.56m
5:56AM0.58m
5:20PM0.49m
6:48AM0.60m
5:42PM0.41m
7:51AM0.61m
5:57PM0.35m
9:11AM0.63m
10:39AM0.65m
11:53AM0.69m
11:42PM0.23m
Low Tide
11:02AM0.18m
11:20PM0.08m
11:55AM0.24m
11:45PM0.07m
1:04PM0.29m
00:15AM0.07m
2:51PM0.32m
00:53AM0.08m
1:48AM0.10m
3:13AM0.11m
8:07PM0.19m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
light rain
thunderstorm
thunderstorm
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:15
6:15
6:15
6:15
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:50
6:49
6:47
6:46
6:45
6:45
6:44
 mm
4
4
1
Temp °C
27
27
26
27
27
26
27
27
25
27
28
26
27
27
25
26
26
25
26
27
26
Feels °C
24
23
25
24
24
24
25
25
23
25
26
25
24
24
21
22
21
20
26
27
27
  • 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 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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