
Surf Forecasts:
Duds Reef surf forecast from 16 Sep 2026:
- Most powerful swell: Friday 18 Sep, 2AM (local time) - 4ft (1.2m), 18s period, SSW swell with 826 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 1.2m 18s and forecast to arrive on Friday (Sep 18) 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 1.1m 6s period and expected on Wednesday (Sep 16) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Fri 18th Sep) | 4ft (1.2m) 18s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what Duds Reef has in store for us over the next couple of weeks.
Straight up, I gotta be honest with you – this is a tough stretch. We’re looking at a long, frustrating run of poor conditions, so don’t get your hopes up too high. The first real chance for a surf that’s worth getting wet for comes Wednesday the 16th of September, but even that’s just a marginal call.
Wednesday the 16th is the pick of a bad bunch. We’ve got a 3ft SSW groundswell rolling in with a long 18-second period, and the combined energy is moderate at (754). The morning’s a bit messy with a cross-shore wind, but by the afternoon the wind swings cross-offshore from the NE at 25 km/h, cleaning things right up. That afternoon session is your best bet – the wave comment says “marginal” but the wind is clean. That 3ft won’t blow you away, but the long period means there’s some push in the water, and it’ll link up okay on the reef.
After that, it’s grim. From Thursday the 17th right through to the end of the month, we are in the wilderness. The wind stays cross or cross-on, blowing 19 to 25 mph, and the swell direction is mostly unfavourable out of the E and ENE. A lot of these days have a “poor surf conditions” tag and a score of zero. The swell height bumps up into the 5ft to 7ft range a few times, like on Thursday the 17th afternoon (5ft) and Sunday the 20th (6ft), but the period drops to a short 8 or 9 seconds, and the wind is just howling cross-shore. That’s lumpy, choppy, and plain ugly – more of a kite-surfing setup than a paddle-surfing one.
There’s a brief flicker on Wednesday the 23rd of September. The swell is 7ft to 7ft from the east with a 10-second period, and the wind goes cross-offshore from the NE. The energy jumps into strong territory (1173) and the wave comment says “marginal” with clean conditions. That said, 7ft at this spot with that short period is going to be a handful – better for experienced surfers only, and you’re looking at a fair bit of rain and even a risk of thunderstorms at that point. It’s promising, but with conditions that unsettled, it’s a long way out and not something to book the day off work for just yet.
The water temperature is sitting pretty average for the time of year, nothing unusual there. Expect clean sessions to be rare and far between.
After the 23rd, we’re back into a frustrating groove of onshore winds and weak, short-period swell right through to October 1st. There’s not a single standout day after that Wednesday. If you’re desperate, the Wednesday afternoon the 16th is your window – otherwise, it’s a waiting game.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 29°C on Wed afternoon, min 26°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Sun morning, min 25°C on Sat night). Mainly fresh winds. | ||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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) | SW 19 | SSW 18 | SSW 18 | SSW 17 | ENE 10 | ENE 9 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 |
Wave Graph | |||||||||||||||||||
535 | 541 | 541 | 510 | 399 | 471 | 826 | 725 | 735 | 627 | 506 | 512 | 410 | 368 | 375 | 371 | 331 | 398 | 476 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 7:27AM0.60m | 5:15PM0.31m | 8:35AM0.57m | 10:01AM0.57m | 11:19AM0.58m | 11:43PM0.23m | 12:15PM0.61m | 00:42AM0.27m | 12:56PM0.63m | 1:19AM0.32m | |||||||||
Low Tide | 11:41PM0.11m | 3:06PM0.30m | 00:08AM0.13m | 00:43AM0.16m | 1:55AM0.18m | 8:04PM0.21m | 8:03PM0.18m | 5:24AM0.18m | 8:13PM0.16m | ||||||||||
— | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | |
6:35 | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | |
mm | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 28 | 29 | 26 | 27 | 28 | 26 | 28 | 28 | 26 | 27 | 27 | 26 | 28 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 28 | 29 | 29 | 25 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 24 | 24 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | S 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 13 |
535 | 541 | 541 | 510 | 322 | 447 | 826 | 725 | 735 | 627 | 506 | 512 | 350 | 310 | 375 | 371 | 331 | 322 | 168 | |
Swell 2 Height (m) Direction Period (s) | ENE 6 | SW 12 | SW 11 | E 10 | SSW 20 | SSW 19 | SSE 10 | SSE 10 | SSE 8 | SSE 6 | SSE 7 | SSE 6 | SSW 16 | SW 15 | SSW 15 | SW 15 | SW 14 | W 11 | SW 13 |
34 | 34 | 31 | 71 | 216 | 214 | 9 | 9 | 24 | 15 | 20 | 16 | 164 | 220 | 142 | 33 | 52 | 9 | 46 | |
Swell 3 Height (m) Direction Period (s) | E 11 | S 8 | S 8 | SW 11 | SW 10 | SSE 10 | SSW 10 | WSW 9 | WSW 9 | S 20 | SSW 18 | S 18 | SSW 14 | SSE 7 | W 12 | W 12 | W 11 | NW 10 | W 13 |
38 | 6 | 5 | 31 | 28 | 10 | 10 | 8 | 8 | 67 | 107 | 162 | 64 | 5 | 3 | 11 | 10 | 4 | 30 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 10 | ENE 10 | ENE 6 | ENE 10 | ENE 9 | ENE 9 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 |
57 | 173 | 320 | 144 | 399 | 471 | 311 | 295 | 257 | 307 | 257 | 302 | 410 | 368 | 346 | 291 | 318 | 398 | 476 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 10 | 12 | 12 | 12 | 21 | 12 | 21 | 22 | 12 | 14 | 21 | 12 | 21 | 21 | 13 | 21 | 22 | 12 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










