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, Rusty here, and I've gotta be straight with you – this 16-day window is a total write-off for Duds Reef. It's a proper reef set-up that's fairly consistent and exposed to the swell, but the conditions just aren't playing ball.
Let's start with the water temp – it's sitting at 81°, which is about normal for this time of year, so no surprises there.
The only half-decent window is right at the start, on Wednesday August 12th. We've got a 3ft to 4ft S swell rolling in with a very long 18-second period – that's proper groundswell, loads of energy (1029 to 1154 combined energy). But the wind is a solid 16 to 19 mph from the ENE, cross-shore, creating a lumpy cross-chop that's gonna mess up the face. The morning's a bit better, but it's still only marginal. Honestly, it's not worth paddling out for.
Then it goes downhill fast. Thursday August 13th through Sunday August 16th sees the swell jump up – 8ft to 12ft of E windswell with a short 10-11 second period, and the wind gets nasty, hitting 25 to 34 mph. That's strong energy (1689 to 2590 combined), but it's a cross-shore mess with a heavy chop. By Sunday August 16th, we're talking near-gale cross-shore winds and crossing waves. This setup looks more interesting for kite surfing than paddle surfing, to be honest.
After that, the swell drops back to 2ft to 5ft, but the wind doesn't let up – it's a moderate to fresh breeze out of the ENE, keeping that cross-chop alive. The wave energy is weak to moderate (330 to 1048 combined), and the period is all over the place, from 7 seconds to 18 seconds. The long-period S and SSW groundswells that pop up around August 21st to 24th are prone to breaking too straight on this reef, and the wind's never clean enough to make it worthwhile.
The only glimmer of hope is on Saturday August 22nd afternoon. The swell is tiny at 2ft from the SW, with a 15-second period, but the wind goes glassy – 3 mph from the ENE, calm as. That's the only time in the whole 16 days where it's clean, but with such small waves, you're just bobbing around. The combined energy is only 408, so it's weak.
The rest of the run is a dead zone. From August 23rd onwards, it's all poor or marginal conditions with moderate cross-shore wind and chop. There's nothing to get excited about.
So, to sum it up: there's a solid 16-day gap with no decent surf. Duds Reef is a consistent spot, so it tends not to stay poor for long, and forecasts can change. But for now, I'd take a break and wait for the next window.
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 | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











