Surf Forecasts:
Duds Reef surf forecast from 30 Aug 2026:
- Most powerful swell: Friday 4 Sep, 11PM (local time) - 10ft (3.0m), 9s period, E swell with 1,575 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 3.0m 9s and forecast to arrive on Friday (Sep 04) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Fri 4th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s not sugarcoat it – the outlook for Duds Reef is a long, tough stretch. We’re looking at a 16-day window where the surf just isn’t cooperating. Expect a gap of about a week and a half before anything even remotely worthwhile shows up.
The energy is present, but the wind is the enemy. Starting Sunday, August 30th, we’ve got a fresh cross-shore wind from the ENE at 22 mph, tearing up a weak 1.6m easterly swell. The combined swell energy is moderate at 565, but it’s all chopped up and lumpy. This same story repeats day after day – Monday, August 31st, is the same deal: 1.6m of ENE swell with a 574 energy reading, but still those nasty cross-shore winds.
We get a weird shift on Tuesday, September 1st. The swell drops to a tiny 0.7m, but the period jumps to a very long 18 seconds, and the direction swings to the SSW. The combined energy spikes to 777 (moderate), and the wind is still a fresh cross-shore. That long period groundswell needs a point or reef to wrap around, and Duds is a reef, so it’s technically the right setup. But the size is tiny, and the cross-shore wind will make it bumpy. Skip it.
The second week doesn’t bring much relief. Around September 7th, we see a spike in energy – Monday afternoon brings a 1.9m ENE swell with a 12-second period, and the combined energy is a massive 2496 (strong!). The wind is a fresh cross-offshore, meaning the face might be clean. That’s the best we’ll see all fortnight, but it’s still only a marginal option. The size is pushing 6ft, so it’s for intermediate surfers and up.
By Wednesday, September 9th, the swell is back up to 3.0m from the ENE with a 10-second period, and the combined energy hits a whopping 3096 (very strong). The wind finally drops to a light breeze, but it’s cross-on in the morning and onshore in the afternoon. That’s a cleanup disaster. That size is for experts only – over 8ft – and at a beach break, that long period will make it a closeout wall. Honestly, that setup looks more interesting for kite surfing than paddle surfing.
The very end of the window, September 14th, is just a whisper. A 0.5m, 21-second period southwest groundswell with a gentle breeze. It’s a pretty, clean-looking line, but there’s no power behind it. Combined energy is only 485.
So, the honest truth? There’s no standout. The best shot is the Monday afternoon on September 7th – 1.9m, 12-second ENE groundswell with a cross-offshore wind. It’s the only time the wind gives you a break. Otherwise, park the board and wait for the next cycle.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Sun morning, min 25°C on Sun morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri night. Warm (max 28°C on Wed afternoon, min 25°C on Wed night). Winds increasing (moderate winds from the ENE on Wed night, strong winds from the ENE by Fri night). | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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) | SSW 16 | E 7 | SSW 15 | E 7 | ENE 8 | S 19 | SSW 18 | ENE 8 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | E 8 | E 8 | E 8 | E 9 | SSE 10 | E 8 | E 8 |
Wave Graph | |||||||||||||||||||||
226 | 198 | 199 | 225 | 273 | 273 | 329 | 318 | 465 | 520 | 401 | 347 | 268 | 250 | 365 | 619 | 1068 | 1476 | 702 | 412 | 302 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | cross |
High Tide | 4:56PM0.56m | 5:56AM0.58m | 5:20PM0.49m | 6:48AM0.60m | 5:42PM0.41m | 7:51AM0.61m | 5:57PM0.35m | 9:11AM0.63m | 10:39AM0.65m | 11:53AM0.69m | 11:42PM0.23m | ||||||||||
Low Tide | 11:02AM0.18m | 11:20PM0.08m | 11:55AM0.24m | 11:45PM0.07m | 1:04PM0.29m | 00:15AM0.07m | 2:51PM0.32m | 00:53AM0.08m | 1:48AM0.10m | 3:13AM0.11m | 8:07PM0.19m | ||||||||||
6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 1 | — |
Temp °C | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 25 | 27 | 28 | 26 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 27 | 26 |
Feels °C | 24 | 23 | 25 | 24 | 24 | 24 | 25 | 25 | 23 | 25 | 26 | 25 | 24 | 24 | 21 | 22 | 21 | 20 | 26 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | S 13 | S 13 | E 13 | SE 12 | E 9 | E 8 | E 8 |
226 | 100 | 199 | 191 | 180 | 273 | 329 | 314 | 465 | 520 | 401 | 347 | 268 | 250 | 229 | 173 | 127 | 282 | 635 | 412 | 302 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | SW 14 | S 12 | SSE 10 | SSE 10 | S 11 | S 11 | E 13 | E 12 | E 12 | E 13 | S 13 | E 14 | SSE 10 | SSE 8 | SSE 6 |
46 | 162 | 85 | 82 | 82 | 50 | 100 | 75 | 35 | 34 | 63 | 58 | 82 | 72 | 72 | 127 | 121 | 132 | 702 | 196 | 64 | |
Swell 3 Height (m) Direction Period (s) | ENE 11 | ENE 11 | E 11 | S 21 | SSW 19 | SW 14 | S 10 | SW 14 | SW 14 | SW 14 | E 15 | E 13 | S 10 | SSE 10 | SE 14 | SE 13 | SE 13 | S 13 | E 13 | E 13 | E 12 |
43 | 40 | 35 | 76 | 123 | 74 | 46 | 51 | 50 | 48 | 38 | 85 | 52 | 33 | 48 | 43 | 62 | 86 | 167 | 209 | 247 | |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 8 | E 8 | E 8 | E 9 | — | — | — |
226 | 198 | 161 | 225 | 273 | 245 | 264 | 318 | 374 | 229 | 232 | 173 | 202 | 220 | 365 | 619 | 1068 | 1476 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 21 | 24 | 12 | 21 | 22 | 12 | 13 | 144 | 12 | 12 | 22 | 12 | 27 | 186 | 183 | 183 | 183 | 147 | 76 | 22 | 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.











