Surf Forecasts:
Duds Reef surf forecast from 12 Jul 2026:
- Best quality surf: Tuesday 14 Jul, 2AM (local time) - 2.5ft (0.8m), 14s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 12 Jul, 8AM (local time) - 3ft (0.9m), 17s period, SW swell with 400 kJ wave energy.
- Next surfable swell (1★+): Tuesday 14 Jul, 2AM (local time) - 2.5ft (0.8m), 14s 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 Tuesday (Jul 14) at 2AM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 1.1m and 8s. Another secondary swell of 1.5m and 7s is also forecast. 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 0.9m 17s and forecast to arrive on Sunday (Jul 12) 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 1.1m 8s period and expected on Tuesday (Jul 14) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 14th Jul) | 2.5ft (0.8m) 14s |
| Best Surf | 2AM (Tue 14th Jul) | 2.5ft (0.8m) 14s |
| Most Powerful | 8AM (Sun 12th Jul) | 3ft (0.9m) 17s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
Alright, Rusty here again, talking in feet and miles per hour. It’s a bleak picture for the next couple weeks. Duds Reef is the only spot on the menu, and it’s not offering much.
Right now, Sunday July 12th, the water's about 80°, which is average. Wind is blowing 22 mph from the east-northeast, cross-shore. We’ve got a 3ft groundswell out of the southwest, period 16 seconds, solid energy (646) but it’s just wind-chopped to junk. That holds for days. Through the 13th and 14th, wind stays moderate, the swell ticks down, and conditions are just “poor.” Not worth wetting a wetsuit.
By the 15th, wind goes cross-onshore, up to about 12 mph from the east-southeast, and the swell drops under 3ft with a period around 13 seconds. That’s just small, lumpy, and frustrating. Through the weekend of the 18th and 19th we pick up some short-period easterly swell—3-4ft at 8 seconds—but it’s windblown and bumpy. The kind of stuff that makes you wonder why you drove down.
On July 20th we get a pulse of S swell, about 2ft, 16-second period, combined energy 542—decent punch—but again the wind is cross-shore and not cooperating. The forecast says “marginal surf forecast or questionable tide conditions”—which is code for maybe you’ll get one or two, but don’t plan a trip around it.
The real hope comes on July 27th. Monday morning we have a 3ft SSW groundswell, period 15 seconds, energy 765, and the wind drops to 9 mph from the east-southeast. That’s a big improvement. By afternoon, it goes glassy—just 3 mph wind from the east-southeast. The forecast says “expect very good surf conditions.” That’s the only true standout. Combined energy holds around 687 in the afternoon. But it’s 16 days out, so don’t book flights yet.
Best on offer: Monday July 27th afternoon at Duds Reef. SSW swell at 3ft, 15-second period, glassy conditions. That’s when the reef might just turn on. Keep an eye on it, but don’t lose sleep over the rest of the forecast.
There’s a lot of days of poor to marginal surf before that. With these winds and this swell size, honestly, the kites might get the better rides than the surfers around here.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Tue afternoon, min 23°C on Mon night). Winds decreasing (fresh winds from the ENE on Sun afternoon, light winds from the ENE by Tue night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Wed afternoon. Warm (max 27°C on Thu afternoon, min 24°C on Thu night). Winds increasing (light winds from the E on Wed night, fresh winds from the ENE by Fri morning). | ||||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 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) | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 | SW 13 | SW 13 | SW 14 | SSW 16 | SSW 16 | SSW 17 | SSW 13 | SSW 16 | SSW 16 | S 14 | SSW 13 | SSW 14 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 376 | 367 | 353 | 322 | 309 | 257 | 239 | 232 | 170 | 164 | 206 | 314 | 173 | 261 | 281 | 223 | 196 | 134 | 141 | 210 | 108 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-off | cross | cross | cross | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross |
High Tide | 2:59PM0.86m | 2:28AM0.26m | 3:43PM0.88m | 3:23AM0.28m | 4:25PM0.87m | 4:16AM0.31m | 5:04PM0.83m | 5:11AM0.34m | 5:41PM0.77m | 6:08AM0.38m | 6:14PM0.69m | 7:09AM0.42m | 6:44PM0.60m | ||||||||
Low Tide | 10:28PM0.15m | 8:02AM-0.03m | 11:04PM0.13m | 8:53AM-0.02m | 11:38PM0.11m | 9:42AM0.01m | 00:12AM0.11m | 10:31AM0.06m | 00:44AM0.11m | 11:21AM0.14m | 1:14AM0.10m | 12:16PM0.22m | 1:44AM0.11m | ||||||||
 | |  | |  |  | | | | |  |  | | | | | | | | | | |
 | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 24 | 25 | 25 | 24 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 27 | 26 |
Feels °C | 23 | 23 | 21 | 22 | 23 | 23 | 26 | 25 | 25 | 26 | 27 | 25 | 25 | 27 | 26 | 24 | 25 | 25 | 25 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | E 8 | ENE 8 | SSW 14 | ENE 8 | W 15 | W 15 | W 15 | W 14 | ENE 6 | SSW 13 | SSW 11 | SW 10 | SSW 9 | SSW 13 | SSW 14 | E 8 |
| kJ | 376 | 367 | 353 | 322 | 309 | 149 | 99 | 232 | 81 | 291 | 283 | 279 | 268 | 55 | 281 | 211 | 148 | 56 | 141 | 210 | 105 |
Swell 2 Height (m) Direction Period (s) | W 12 | SSE 12 | W 12 | SSE 12 | W 18 | SSW 14 | SSW 14 | W 16 | W 15 | ENE 7 | SW 14 | SSW 16 | SSW 16 | W 14 | W 14 | SSW 16 | SSW 16 | S 14 | E 6 | ENE 8 | S 12 |
| kJ | 48 | 47 | 47 | 46 | 152 | 257 | 239 | 257 | 298 | 71 | 206 | 314 | 173 | 264 | 200 | 223 | 196 | 134 | 28 | 70 | 108 |
Swell 3 Height (m) Direction Period (s) | SSE 13 | W 12 | SSE 12 | W 12 | SSE 11 | W 18 | W 16 | SW 19 | SW 13 | SW 13 | ENE 7 | ENE 7 | SSE 8 | SSW 17 | SSW 9 | W 14 | W 14 | W 13 | W 13 | WNW 13 | WNW 13 |
| kJ | 55 | 47 | 47 | 26 | 25 | 158 | 257 | 93 | 170 | 164 | 52 | 36 | 55 | 261 | 32 | 144 | 142 | 90 | 87 | 57 | 53 |
Wind waves Height (m) Direction Period (s) | E 7 | ENE 8 | E 8 | E 8 | E 8 | ENE 7 | ENE 8 | ENE 8 | NE 8 | — | — | — | ENE 6 | — | E 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | — | — |
| kJ | 215 | 273 | 251 | 251 | 280 | 237 | 107 | 127 | 141 | — | — | — | 53 | — | 78 | 81 | 68 | 51 | 51 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 21 | 27 | 21 | 14 | 12 | 0 | 10 | 12 | 6 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 12 | 12 | 12 | 6 |
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.
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