Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 am 02 Sep 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 2 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 5AM (local time) - 7ft (2.2m), 13s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 11AM (local time) - 11ft (3.5m), 14s period, SW swell with 5,161 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 5AM (local time) - 7ft (2.2m), 13s 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 Sunday (Sep 06) at 5AM. The primary swell is predicted to be 2.2m and 13s period with a secondary swell of 1.7m and 13s. Another secondary swell of 1.5m and 12s 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 3.5m 14s and forecast to arrive on Tuesday (Sep 08) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 10s period and expected on Saturday (Sep 05) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sun 6th Sep)7ft (2.2m) 13s
Best Surf 5AM (Sun 6th Sep)7ft (2.2m) 13s
Most Powerful11AM (Tue 8th Sep)11ft (3.5m) 14s

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


The Lowdown

Alright folks, Rusty here. Let’s have a proper look at what’s coming our way for the next couple of weeks. I’ll be straight with you – we’ve got a bit of a rough patch to get through before things start looking up.

Right now, there’s no surf worth paddling out for. We’re looking at a stretch of really poor conditions for the next several days. The wind is howling out of the ENE, consistently blowing 30 km/h, and it’s coming straight across the face of the swell, making a mess of everything. The wave energy is moderate early on, but the quality is just non-existent. This run of no-go surf looks set to last until around Saturday the 5th of September.

The first real sniff of something half-decent comes on Saturday the 5th of September at Duds Reef. We’ve got a moderate 2 ft swell coming from the East with a long period of 13 seconds. The combined swell energy is noticeably strong (1988). But here’s the catch – the wind is still a fresh cross-shore from the ENE at 19 mph. It’s going to be lumpy and cross-chop. It’s only a marginal call, but the swell has some heft to it. The water temp is sitting at a pretty normal 81° for this time of year.

The outlook improves a touch into Sunday the 6th. The swell drops a little to 2 ft, but the wind eases to a moderate 16 km/h cross-shore. Still not clean, but there’s a chance of a few fun ones if you’re patient. The wave energy is still strong (1655). Keep an eye on the sky though – there’s a risk of thunderstorms kicking up in the afternoon.

Now, Monday the 7th of September is where we start to see some potential. The wind finally backs off, with a gentle cross-shore breeze of just 9 mph in the morning. The swell holds at 6 ft from the East, with a long 13-second period and very strong energy (2376). It’s still a little lumpy, but it’s a better chance than we’ve had.

Tuesday the 8th of September is a bit of a weird one. The charts are showing a big pulse of swell – 12 ft from the Southwest with a 14-second period – and the combined energy is huge (6458). But it’s onshore wind, blowing directly into the face from the Southeast at 19 mph. That means close-out city. Honestly, this setup looks more interesting for kite surfing than for paddling out. Leave the longboard at home, and if you’re an expert, maybe have a look, but don’t expect any kind of shape.

Things finally get interesting on Saturday the 12th of September. This is the standout window. The morning is still a bit messy, but the afternoon at Duds Reef is where the magic might happen. Swell drops to 2 ft from the SSW, but the period is a super long 13 seconds. The wind swings around to a light cross-offshore from the Northeast at just 3 mph. That’s as close to clean as it gets. With a combined swell energy of 378, it’s not a massive day, but the conditions will be clean. This is a good one for the longboard or a fish.

Then Sunday the 13th of September rolls in with another gem. The afternoon sees a 4 ft ENE swell with a short period (7 seconds), which isn't amazing for power, but the wind is absolutely glassy – dead calm with a slight air from the NNE. The wave energy is lower (272), but clean, workable surf is on the cards. For a reef break, the long-period SSW swell earlier is usually best, but this glassy window will make the most of what's there.

Looking further out, Tuesday the 15th of September in the morning has a very promising deep-water swell. Only 2 ft from the SSW, but with a massive 21-second period. That is a very long groundswell, and combined with glassy conditions (SE 3 mph), the conditions could be excellent. The combined energy is moderate to strong (626). The long period means lots of energy and long waits between sets, so you’ll have time to paddle out. This is one to watch, but being more than a week away, it’s a promising but less certain call.

So, to sum it up: the first week is mostly a write-off. The standout days are Saturday afternoon the 12th and Sunday afternoon the 13th for clean conditions, and the early morning of Tuesday the 15th of September for some seriously clean, long-period energy.

Stay keen.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

Light rain (total 7mm), mostly falling on Sun night. Warm (max 28°C on Sun afternoon, min 25°C on Sat night). Mainly fresh winds.

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
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
0
0
1
1
1
2
1
2
2
2
2
0
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
S
16
0.9
S
16
2
E
8
1.8
E
8
1.9
E
8
1.2
SSE
12
1.3
SSE
12
1
E
14
1.4
S
12
1.8
E
13
1.8
E
13
1.7
E
13
1.8
E
13
1.6
SSW
12
1.7
E
12
1.8
E
13
1.7
SW
14
2.3
SW
14
3.5
SW
14
3.5
SW
13
2.1
SSW
10
Wave Graph
Metric surfscale
Energy kJ
520
401
470
362
403
387
486
397
572
1155
1138
1001
1037
771
855
1087
1127
2247
5161
3350
907
Wind (km/h)
35
ENE
35
ENE
35
ENE
40
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
25
ENE
20
ENE
25
ENE
25
ENE
15
E
15
ENE
20
E
25
ESE
30
SE
25
SE
15
ESE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
on
on
cross-on
High Tide
5:57PM0.35m
9:11AM0.63m
10:39AM0.65m
11:53AM0.69m
11:42PM0.23m
12:50PM0.73m
00:58AM0.28m
1:37PM0.75m
1:49AM0.35m
2:17PM0.75m
2:33AM0.42m
Low Tide
2:51PM0.32m
00:53AM0.08m
1:48AM0.10m
3:13AM0.11m
8:07PM0.19m
8:24PM0.16m
6:09AM0.09m
8:46PM0.13m
7:12AM0.08m
9:09PM0.11m
clear
clear
clear
part cloud
clear
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
thunderstorm
rain showers
light rain
part cloud
part cloud
clear
clear
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:15
6:15
6:16
6:16
6:16
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:46
6:45
6:45
6:44
6:43
6:42
6:40
 mm
1
3
3
1
Temp °C
27
27
25
26
27
25
26
26
25
27
27
26
27
28
26
26
27
26
27
28
27
Feels °C
25
24
22
22
24
22
23
23
23
25
25
26
26
27
26
27
27
27
27
28
28
  • 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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