Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 am 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
27.5°C
0.7° 

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 25 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 5AM (local time) - 2ft (0.6m), 19s period, S swell with cross-offshore winds.
  • Most powerful swell: Thursday 27 Aug, 11AM (local time) - 4.5ft (1.3m), 17s period, S swell with 998 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 5AM (local time) - 2ft (0.6m), 19s period with S 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 Tuesday (Sep 01) at 5AM. The primary swell is predicted to be 0.6m and 19s period with a secondary swell of 0.5m and 10s. Another secondary swell of 1.4m and 8s is also forecast. 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 1.3m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 9s period and expected on Thursday (Aug 27) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 1st Sep)2ft (0.6m) 19s
Best Surf 5AM (Tue 1st Sep)2ft (0.6m) 19s
Most Powerful11AM (Thu 27th Aug)4.5ft (1.3m) 17s

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


The Lowdown

Right, let’s get into it. I’ve been staring at the charts for Duds Reef, and honestly, it’s a bit of a grim stretch for the first week or so.

Right out of the gate, for the first few days, we’ve got a messy, lumpy ocean. The wind is a solid cross-shore fresh breeze, constantly chopping things up. The swell is all over the place – short-period, weak energy (479) – and it’s just not going to be any fun. You’ll be fighting for a clean face and losing. My advice? Give it a miss. That’s from the 25th through to the 28th. It’s all poor-surf conditions with a score of zero, which says it all.

There’s a slight pulse of longer-period southerly swell coming through on the 27th morning. It’s got a bit more energy (1093), but the wind is still a problem, and the forecast marks it as marginal at best. It’s not worth gearing up for; too much chop for the size on offer.

The run of poor conditions continues solidly until the end of the month. We’re looking at a nasty combination of ENE cross-shore winds and short, weak easterly swell. The water’s about average for the time of year, so no surprises there. It’s a flat, choppy spell.

We finally get a day that’s slightly less terrible on the 5th of September. The wind swings around to a cross-offshore direction (NE) at 16 mph, which will clean things up a bit, and there’s a 5ft east swell, but the period is a pitiful 7 seconds. It’s still marginal, a score of 2, and a far cry from good, but for the first time in over a week, there might be a salvageable, albeit short-period, wave. It’s an improvement, not a celebration. Energy is moderate at (562).

The outlook starts to look genuinely interesting on the 9th of September. The wind finally drops out to a light breeze from the NNE, turning cross-offshore and making things glassy. There’s a long-period south swell coming in with a period of 19 seconds, which is a proper groundswell. The energy is moderate (575), and the forecast literally says to expect very good surf conditions. This is the standout in the whole 16-day window. This long-period swell is going to wrap into Duds Reef with proper shape and power, and with that light wind it’s going to be clean. The only caveat is that this is a jump into the future—more than a week away—so we’ll need to check the charts closer to the day, but this is the one to circle on the calendar.

Before that, there might be a couple of other mornings in the second week with lighter winds, like the 2nd and 3rd of September, but the period drops and the energy is less. They’re still marginal, so don’t get your hopes up. The 9th is the day. Keep an eye on it.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

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

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
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
1
1
0
1
0
0
0
0
0
0
0
0
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)
1.5
E
7
1.4
E
7
1.4
E
7
0.8
SSW
14
0.8
S
18
0.8
S
19
1.3
S
17
1
S
16
1.1
S
16
0.9
S
14
1
S
14
0.8
S
13
0.8
S
13
1.5
E
7
0.6
SSW
17
0.7
SSW
16
1.5
E
7
0.7
SSW
15
0.7
SSW
15
0.7
SSW
14
1.5
E
8
Wave Graph
Metric surfscale
Energy kJ
202
198
200
236
395
458
998
527
582
329
399
225
219
215
188
226
218
199
191
186
272
Wind (km/h)
35
ENE
30
ENE
25
ENE
30
ENE
30
ENE
25
ENE
25
ENE
25
ENE
20
ENE
30
ENE
30
ENE
25
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
25
ENE
30
ENE
30
ENE
15
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
High Tide
2:45PM0.72m
2:41AM0.35m
3:13PM0.72m
3:16AM0.40m
3:40PM0.70m
3:53AM0.45m
4:05PM0.67m
4:31AM0.50m
4:31PM0.62m
5:12AM0.55m
4:56PM0.56m
5:56AM0.58m
5:20PM0.49m
Low Tide
9:43PM0.15m
8:10AM0.07m
10:00PM0.13m
8:51AM0.08m
10:18PM0.11m
9:32AM0.10m
10:37PM0.10m
10:15AM0.14m
10:58PM0.09m
11:02AM0.18m
11:20PM0.08m
11:55AM0.24m
11:45PM0.07m
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:13
6:13
6:13
6:13
6:13
6:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:53
6:52
6:52
6:51
6:51
6:50
6:49
 mm
Temp °C
27
27
26
26
27
25
26
27
25
27
27
25
26
27
25
27
27
26
27
27
26
Feels °C
24
24
25
23
24
23
25
25
24
24
24
24
24
24
22
25
24
24
25
24
25
  • 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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