Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 am 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
27.0° C
0.4° 

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 5 Aug 2026:

  • Best quality surf: Wednesday 5 Aug, 5AM (local time) - 3.5ft (1.0m), 10s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Wednesday 12 Aug, 2AM (local time) - 2.5ft (0.8m), 20s period, S swell with 485 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 5 Aug, 5AM (local time) - 3.5ft (1.0m), 10s period with ENE swell.

Best Forecast Surf Conditions for Duds Reef this week:

The surf forecast for Duds Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 05) at 5AM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.5m and 11s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Duds Reef in the next 16 days are 0.8m 20s and forecast to arrive on Wednesday (Aug 12) 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 1.0m 6s period and expected on Thursday (Aug 06) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 5th Aug)3.5ft (1.0m) 10s
Best Surf 5AM (Wed 5th Aug)3.5ft (1.0m) 10s
Most Powerful 2AM (Wed 12th Aug)2.5ft (0.8m) 20s

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


The Lowdown

Alright folks, Rusty here. We’ve got a long stretch of the 16-day outlook to get through, so let’s break it down. The only spot with any detail is Duds Reef, which is a fairly consistent reef break (exposed, with an optimum swell from the SSE). But the wind isn't cooperating, and the swell is mostly coming from the wrong direction, so it’s a rough ride ahead.

The forecast starts on Wednesday, 5th of August. Don’t get your hopes up. We’re looking at a weak 3 ft swell from the ENE with a short period of 10 seconds, and the combined energy is only 292. That’s weak energy, and the cross-shore wind is a moderate 12 mph. It’s messy, with a cross-chop.

Thursday the 6th drops right off – we’re down to 1 ft from the SSW, with a long period of 14 seconds. The energy is 184, still weak. The wind is lighter but still cross. It’s not doing anything for us.

Friday the 7th and Saturday the 8th are more of the same – small, weak, and cross-shore winds. The swell is tiny, 1 ft to 2 ft, with moderate to fresh breezes in the 15-19 mph range. The period is long on the 7th, but the swell is just too small to matter. The energy stays under 600.

Sunday the 9th sees a pulse of 5 ft from the ENE, but the period is a poor 7 seconds. That’s short-period windswell, not the good stuff. The wind is a fresh 19 mph cross-shore, and the lumpy cross-chop is going to make it a real battle. The energy is moderate (536-582). This is not a surf day.

Monday the 10th and Tuesday the 11th – the swell gets mixed up, with some longer period SSW swell (15 seconds) at 2 ft to 3 ft, but the wind stays strong (15-19 mph cross-shore). The energy is moderate (442-538). The bumps will be relentless.

Now, Wednesday the 12th of August, things start to look a bit more interesting for the brave. The swell picks up to 3 ft from the S, with a solid 18-second period. The combined energy jumps to 963 (moderate). The wind is a fresh 22 mph cross-shore, but that long period gives it some push. The Thursday afternoon and Friday the 13th-14th keep the S swell around 3 ft to 4 ft, with periods of 15-18 seconds, but the wind is still 22 mph cross-shore. The energy is strong here (1052 on Thursday morning). Despite the strong wind, the long period might make the paddling easier, but the chop will be messy.

The real standouts, if you can call them that, come later. Saturday the 15th and Sunday the 16th of August see the swell building to 6 ft to 6 ft from the E, but the period drops to 8 seconds. That’s short period and the wind is a strong 22-25 mph cross-shore. The energy is strong (557-667). This is looking more like a kite-surfing session than a paddle-surfing one. The waves will be fat and choppy.

Monday the 17th and Tuesday the 18th of August, the swell pushes up to 7 ft to 8 ft from the ENE/E, with a period of 9 seconds. The combined energy is very strong (1102-1112). The wind is still a fresh 22 mph cross-shore. This is now in the expert-only zone (over 8 ft on the 18th afternoon). The waves will be big, but messy and powerful.

Wednesday the 19th of August keeps the 7 ft from the ENE, period 9 seconds, energy 1106-1237. The wind is a fresh 19 mph cross-shore. Still big and lumpy.

Finally, Thursday the 20th of August, the last day in the window, we see a drop back to 3 ft from the SW, with a long 18-second period. The wind eases to a gentle 9 mph cross-shore. The energy is still very strong at 1209, but the swell is small. The score is a 3/10, the best of the bunch. This is the only day that’s even close to decent, with clean-ish conditions possible due to the lighter wind. But it’s a long way off.

The best of the lot is Thursday the 20th of August at Duds Reef. The long period SW swell (3 ft, 18 seconds) will have some push, and the gentle cross-shore wind (9 mph) might just give you a window of clean-ish waves. The combined energy is 1209, which is strong. It’s not a classic, but it’s the only one worth a look.

All in all, the first week is a write-off. The second week has some size, but the wind is a constant problem. The setup is more for the kite crowd than for us paddle surfers. Keep an eye on that Thursday the 20th, but don’t hold your breath.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 27°C on Wed morning, min 24°C on Thu night). Mainly fresh winds.

Days 4-6 Weather Summary

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

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
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
1
0
0
0
0
0
0
0
0
0
1
0
0
0
1
1
0
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)
0.9
ENE
10
1.1
ENE
9
0.9
ENE
9
0.4
SSW
14
0.5
SW
14
0.6
SSW
14
0.4
SSW
14
0.4
SW
20
0.6
SSW
14
0.6
SSW
18
1.3
E
7
0.6
SSW
17
1.3
E
7
1.6
ENE
7
0.8
SSW
16
1.3
E
7
0.7
SSW
15
1.6
ENE
7
0.8
SSW
15
0.8
SSW
14
0.8
S
20
Wave Graph
Metric surfscale
Energy kJ
160
203
111
81
102
138
76
99
148
221
154
202
186
292
288
184
234
276
284
273
485
Wind (km/h)
20
E
20
ENE
15
ENE
20
E
25
ENE
15
ENE
25
ENE
20
ENE
25
ENE
30
ENE
35
ENE
30
ENE
25
ENE
25
ENE
25
ENE
20
ENE
25
ENE
20
ENE
30
ENE
30
ENE
20
ENE
Wind State
cross
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
9:44AM0.57m
6:58PM0.36m
11:04AM0.63m
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
Low Tide
4:49PM0.35m
2:38AM0.08m
3:41AM0.08m
8:48PM0.23m
9:04PM0.19m
6:05AM0.04m
9:29PM0.15m
7:07AM0.02m
9:56PM0.13m
8:02AM0.01m
10:23PM0.11m
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clear
clear
part cloud
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clear
part cloud
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part cloud
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clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:07
6:07
6:07
6:07
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:07
7:07
7:07
7:07
7:06
7:05
7:05
 mm
Temp °C
27
27
26
27
27
25
26
27
25
26
27
25
25
26
25
27
28
26
27
28
26
Feels °C
27
26
27
27
26
25
25
25
25
24
25
24
25
25
24
27
27
27
25
26
26
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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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