Surf Forecasts:
Duds Reef surf forecast from 12 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 8AM (local time) - 15ft (4.5m), 10s period, E swell with 4,314 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 4.5m 10s and forecast to arrive on Sunday (Aug 16) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 12s period and expected on Sunday (Aug 16) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Sun 16th Aug) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
G'day, I'm Rusty. Let's paddle out and have a look at what's coming our way at Duds Reef.
Alright, the long and short of it is this is a tough stretch. We've got a massive 16-day window here, and there's just no clean, quality surf on offer for a surfer. The whole period is plagued by persistent cross-shore winds from the east-northeast that just won't let up, turning most of what could be a decent wave into lumpy, cross-chop chaos.
The week kicks off on Wednesday morning, August 12th. We see a south swell pushing in at 3 ft, with a very long period of 18 seconds. The combined swell energy is a moderate 1043, so there's some real power behind it. But that's all ruined by a fresh 19 mph cross-shore wind from the ENE. The water's warm at 81°F, which is about normal for this time of year, but that's small comfort when you're battling the chop.
That pattern just repeats itself through Thursday and Friday. The swell hangs around the 3 ft to 4 ft range, but those cross-shore winds from the east or ENE get up to 22 mph. The reports are all "poor surf conditions". Honestly, this is a write-off for stand-up paddling. With that persistent cross-wind, this setup looks more interesting for kite surfing than paddle surfing.
The worst of it comes on Saturday the 15th and Sunday the 16th. The swell energy blows up – we're talking 1455 on Saturday morning, rocketing to a very strong 3524 on Sunday morning. But the swell height jumps to 8 ft to 13 ft, with a short, weak period of 10 seconds. That combined with a near gale-force cross-shore wind on Sunday and the risk of thunderstorms makes it dangerous, messy, and unrideable. For experts only if they’re crazy, and even then, it's not worth it.
We get a small breather on Monday morning the 17th. The wind drops to a light 9 mph cross-shore and the swell drops to 3 ft from the south with a long 14-second period. The combined energy is a moderate 749. It's labelled as "marginal." If you're desperate, you might find a grovelly peak before the wind picks up again. But it’s far from a standout.
From there, it's a slow, sad fade. The swell size drops into the 2 ft to 4 ft range for the rest of the month, and those cross-shore winds come back every afternoon. Nothing here is consistent enough to plan a session around. Several days in a row are just flat, blown-out scraps.
The only glimmer of a wave is on Monday, August 24th morning. The swell bumps back up to 4 ft from the SSW with a 15-second period, giving us a combined energy of 855. The wind is a moderate 16 mph cross-shore, which is the "best" we get. Still, it's a cross-shore and the report says "poor surf conditions." It's a long way off in the forecast, and even then, it's not a standout.
Honestly, it's a bleak outlook. There’s no standout session in this 16-day run. The persistent cross-shore winds kill every chance of quality, and the few moments of decent swell get blown out. I wouldn't be waxing up for anything here until we see a change in that wind pattern. Hang in there.
- Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Wed afternoon, min 25°C on Wed night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 33mm), heaviest during Sun morning. Warm (max 28°C on Sat afternoon, min 24°C on Sun morning). Winds decreasing (gales from the ENE on Sun morning, light winds from the E by Mon morning). | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | ENE 8 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | S 14 | S 14 | S 13 | E 7 | E 7 | S 13 |
Wave Graph | |||||||||||||||||||||
627 | 741 | 1029 | 858 | 763 | 636 | 496 | 496 | 450 | 1146 | 1734 | 1655 | 3060 | 1397 | 432 | 412 | 329 | 222 | 168 | 138 | 117 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross | cross | cross | cross | cross-off | cross | cross | cross-off | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 3:59PM0.80m | 4:08AM0.41m | 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 | ||||||||
Low Tide | 8:53AM0.02m | 10:50PM0.10m | 9:42AM0.06m | 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 | |||||||
6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | |
— | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 19 | 6 | 6 | — | 1 | — | — | — | — |
Temp °C | 27 | 28 | 25 | 28 | 28 | 25 | 27 | 28 | 26 | 27 | 28 | 26 | 25 | 27 | 27 | 28 | 27 | 25 | 26 | 27 | 25 |
Feels °C | 25 | 26 | 24 | 25 | 25 | 23 | 24 | 25 | 24 | 24 | 25 | 23 | 21 | 26 | 26 | 30 | 26 | 24 | 24 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 16 | S 13 | E 9 | S 14 | E 8 | S 13 | S 13 | S 13 | S 13 |
627 | 741 | 1029 | 858 | 763 | 636 | 496 | 496 | 377 | 280 | 219 | 225 | 427 | 163 | 432 | 412 | 201 | 222 | 168 | 119 | 117 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | WNW 12 | WNW 12 | WNW 12 | WNW 11 | WNW 12 | WNW 12 | W 11 | W 11 | WNW 13 | S 18 | WNW 12 | S 16 | SSE 7 | SSE 6 | S 14 | SSE 6 | SSW 17 | SSW 18 | SSE 9 |
289 | 289 | 28 | 27 | 27 | 25 | 27 | 27 | 21 | 22 | 34 | 99 | 48 | 183 | 114 | 25 | 329 | 6 | 115 | 123 | 30 | |
Swell 3 Height (m) Direction Period (s) | WNW 13 | WNW 12 | SSE 9 | SSE 9 | SSE 9 | SW 18 | SSE 11 | SSW 18 | SSW 17 | SSW 17 | S 19 | WNW 13 | SSW 19 | WNW 12 | S 14 | SSW 5 | SSE 6 | WNW 11 | SE 8 | SSE 10 | SW 18 |
55 | 28 | 8 | 8 | 8 | 13 | 13 | 30 | 29 | 29 | 64 | 56 | 37 | 27 | 315 | 17 | 20 | 24 | 18 | 36 | 79 | |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | E 6 | E 7 | ENE 7 | E 8 | E 8 | E 8 | ENE 8 | E 10 | E 10 | E 10 | E 10 | E 9 | — | E 8 | ENE 8 | E 7 | E 7 | E 7 | E 7 |
127 | 127 | 120 | 124 | 175 | 319 | 294 | 365 | 450 | 1146 | 1734 | 1655 | 3060 | 1397 | — | 295 | 220 | 134 | 168 | 138 | 106 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 144 | 12 | 13 | 144 | 13 | 27 | 144 | 27 | 183 | 183 | 183 | 192 | 76 | 28 | 12 | 22 | 12 | 12 | 13 | 12 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.











