Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 pm 13 Aug 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
27.3° 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 14 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 2AM (local time) - 2ft (0.6m), 16s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Sunday 16 Aug, 2AM (local time) - 13ft (4.0m), 10s period, E swell with 2,836 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 2AM (local time) - 2ft (0.6m), 16s period with SSW 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 Thursday (Aug 20) at 2AM. The primary swell is predicted to be 0.6m and 16s period with a secondary swell of 0.9m and 8s. 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 4.0m 10s and forecast to arrive on Sunday (Aug 16) 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 0.8m 7s period and expected on Thursday (Aug 20) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Thu 20th Aug)2ft (0.6m) 16s
Best Surf 2AM (Thu 20th Aug)2ft (0.6m) 16s
Most Powerful 2AM (Sun 16th Aug)13ft (4.0m) 10s

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


The Lowdown

Alright, let’s get this out there. Tough one today.

The next couple of weeks look pretty average, mate. For the area around Duds Reef, we’ve got a long stretch of nothing much to get excited about. In fact, there’s basically no surf worth paddling out for the first week. From Thursday 13th right through to Wednesday 19th, it’s all poor conditions – strong cross-shore winds, lumpy chop, and just messy waves. The swell’s there but the wind has it wrecked. Not worth a look.

On Saturday 15th, the swell jumps up to 10 ft from the East, period a short 9 seconds, and the combined energy hits 1732 – so there’s plenty of power. But with a near gale cross-shore wind at 31 mph, it’s all blown out. At 12 ft in the afternoon, that’s expert-only territory and even then it’s a mess. Honestly, this setup looks more interesting for kite surfing than paddle surfing.

The second week doesn’t offer much hope either. From Thursday 20th onward, the swell drops right down to 2 ft to 3 ft, with periods getting long (16 to 18 seconds). That’s groundswell, which can mean clean lines, but the energy is weak – combined energy values sit between 262 and 594 – and the wind is mostly cross or cross-onshore. There’s a couple of marginal days, like Thursday 20th afternoon and Friday 21st afternoon, where the swell is small (2 ft to 3 ft) from the SSW, with light breezes, but it’s only scoring a 1 out of 10. Not worth a session.

Thursday 27th and Friday 28th see a bit more life – swell builds to 3 ft to 5 ft from the East, with period stretching to 16 to 17 seconds. The energy picks up to around 1285 to 1476, but the wind is still moderate cross-shore or cross-onshore, keeping things choppy. Friday 28th morning is the best of a bad lot, with 4 ft from the East, period 16 seconds, and energy at 1350. Still only a 2 out of 10 though.

Duds Reef is a reef break, exposed to swell from the SSE, and it’s fairly consistent normally. But with the wind direction locked in from the ENE for most days, the cross-shore wind is just killing the quality. The water temp is 81°F, about average for this time of year, so at least it’s warm.

Bottom line: there are no real standouts in this 16-day window. It’s a long stretch of poor to marginal surf. If you were hoping for a good session, you’re going to be disappointed. Forecasts can change, but right now it’s a blank run.

– Rusty

Short Range Forecast

Heavy rain (total 31mm), heaviest during Sun morning. Warm (max 28°C on Thu afternoon, min 25°C on Thu night). Winds increasing (moderate winds from the ENE on Thu night, near gales from the ENE by Sat night).

Days 5-7 Weather Summary

Moderate rain (total 12mm), heaviest on Sun afternoon. Warm (max 27°C on Sun afternoon, min 25°C on Sun afternoon). Mainly fresh winds.

Thu
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
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
0
3
0
0
0
0
0
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)
1.3
S
15
1.2
S
15
1.1
S
14
1.1
S
14
2.2
E
8
3
E
9
3.5
E
9
4
E
10
3
E
9
2.3
SE
8
1.6
ENE
8
1.6
ENE
8
0.9
S
14
0.8
S
13
0.8
S
13
0.7
S
13
0.7
S
13
0.5
SW
16
0.5
SW
16
0.6
SSW
16
Wave Graph
Metric surfscale
Energy kJ
763
636
496
496
650
1440
1918
2836
1392
653
315
334
329
222
219
162
159
129
125
175
Wind (km/h)
35
ENE
30
ENE
35
ENE
35
ENE
40
ENE
50
ENE
50
ENE
55
ENE
40
E
25
E
15
ENE
30
ENE
25
ENE
25
ENE
30
ENE
25
ENE
20
ENE
20
ENE
25
ENE
15
NE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
High Tide
4:32PM0.75m
4:55AM0.46m
5:02PM0.68m
5:41AM0.50m
5:29PM0.60m
6:30AM0.53m
5:53PM0.51m
7:23AM0.54m
6:10PM0.44m
8:25AM0.55m
6:13PM0.37m
9:42AM0.56m
Low Tide
11:15PM0.09m
10:30AM0.11m
11:40PM0.09m
11:19AM0.18m
00:04AM0.09m
12:13PM0.25m
00:28AM0.10m
1:18PM0.31m
00:54AM0.11m
2:59PM0.34m
1:23AM0.13m
2:04AM0.14m
clear
clear
clear
clear
clear
clear
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
rain showers
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:02
7:01
7:00
7:00
7:00
6:59
 mm
1
30
7
4
1
Temp °C
28
25
27
28
25
27
27
26
25
27
26
26
27
25
26
27
25
26
27
25
Feels °C
25
24
23
25
23
22
22
21
21
27
27
26
27
24
23
25
25
25
26
25
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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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