
Surf Forecasts:
Rockpiles surf forecast from 21 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 8AM (local time) - 2.5ft (0.8m), 15s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 27 Jul, 2PM (local time) - 6.5ft (2.0m), 14s period, E swell with 1,653 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 8AM (local time) - 2.5ft (0.8m), 15s period with S swell.
Best Forecast Surf Conditions for Rockpiles this week:
The surf forecast for Rockpiles over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 21) at 8AM. The primary swell is predicted to be 0.8m and 15s period with a secondary swell of 1.2m and 7s. Another secondary swell of 0.9m and 7s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Rockpiles in the next 16 days are 2.0m 14s and forecast to arrive on Monday (Jul 27) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Jul 22) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 21st Jul) | 2.5ft (0.8m) 15s |
| Best Surf | 8AM (Tue 21st Jul) | 2.5ft (0.8m) 15s |
| Most Powerful | 2PM (Mon 27th Jul) | 6.5ft (2.0m) 14s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks.
Overall, it’s a slow start and we’ve got a bit of a wait on our hands. The first few days are pretty marginal with small, clean but weak swell. The real standout action is shaping up for the end of next week, with a solid pulse of easterly groundswell that’ll have the place pumping. There’s a long gap of nothing much at the beginning, then a few days of small stuff before the main event.
We’re kicking off at Rockpiles (reef). The water temp is sitting at a comfortable 80°, which is right around the normal mark for this time of year, so no surprises there.
The first decent window pops up on Monday 20 July afternoon. Swell is a modest 2.6 ft from the south, but with a very long 16-second period – that’s proper groundswell energy. The combined swell energy is moderate (595). Winds are cross-off from the ENE at 19 mph, which keeps it clean. It’s not big, but those long lines will wrap in nicely. The spot is fairly consistent, but crowds are possible, so get in early.
Tuesday 21 July looks similar. Morning shows 3 ft from the south, 14-second period, with ENE cross-off at 12 mph. Combined energy is moderate (533). Afternoon picks up a touch more wind at 19 mph, but the swell holds. Still small, still clean.
Wednesday 22 July morning is a write-off – 4.6 ft of short-period, wind-affected ENE slop (7 seconds) and strong cross-off winds. The afternoon sees a tiny 2 ft SSW swell with a very long 23-second period (combined energy 799), but it’s just too small to get excited about.
Thursday 23 and Friday 24 July are frustrating. The SSW swell holds at 2.3 ft to 3 ft with long periods (18-20 seconds), but the wind is howling cross-off at 22-25 mph. Combined energy is strong (847-958), but the conditions are poor. The water is going to be a mess.
Then on Friday 24 July afternoon, a sneaky 6.9 ft pulse from the ENE hits with a short 7-second period and combined energy of 1129 (strong). It’s a bit of a windswell, and with 25 mph winds, it’s more of a kite session than a paddle session at this beach break setup.
Saturday 25 July is another marginal day. 2.3 ft to 3 ft SSW swell with long 18-19 second periods, strong combined energy (1098-1230), but the wind is still a fresh cross-off 19-22 mph. Clean, but not great.
Sunday 26 July is where things start to get interesting. We’re looking at 5.2 ft to 5.6 ft from the east, with a very long 16-second period. Combined energy jumps to very strong (2208-2255). Winds are cross-off from the NE at 19 mph. This is solid groundswell and the reef will handle that long period beautifully. For experienced surfers, this is the first real standout.
Monday 27 July holds that east swell at 5.6 ft to 6.2 ft, 14-15 second period, combined energy still very strong (1515-1742). Winds are a touch lighter at 16-19 mph from the NE and ENE. It’s clean, consistent, and powerful.
The true standout is Tuesday 28 July. The morning shows 6.9 ft from the east, 13-second period, combined energy 1663 (very strong). Afternoon pushes to 7.9 ft from the ENE, 13-second period, combined energy 2184. Winds drop to a gentle 9 mph cross-off. This is serious size for the reef. It’s in the expert-only zone – over 8 ft in the afternoon. If you’re experienced, it’s going to be a day to remember.
Wednesday 29 July morning is the absolute peak. 7.9 ft from the ENE, 13-second period, combined energy 2000 (very strong), and winds are light at 6 mph cross-off. The conditions are described as excellent for experienced surfers. This is it. The best on offer. The afternoon sees 8.2 ft with a slightly shorter 12-second period and winds picking up to 12 mph, but still solid.
After that, the swell fades fast. Thursday 30 July drops to 1.6 ft to 2 ft from the south and southwest, with combined energy weak (175-271). Poor to marginal.
The first week of August brings a return of short-period, wind-affected ENE swell between 4.6 ft and 6.2 ft, with periods around 8 seconds and combined energy in the moderate range (564-715). Winds remain fresh cross-off. It’s a letdown after that big east swell, and the conditions are poor to marginal.
The last few days of the forecast, Monday 3 August to Tuesday 4 August
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Warm (max 27°C on Tue afternoon, min 24°C on Tue night). Winds increasing (light winds from the ENE on Tue morning, fresh winds from the ENE by Thu morning). | Days 5-7 Weather SummarySome drizzle, heaviest during Fri morning. Warm (max 25°C on Thu afternoon, min 24°C on Thu night). Mainly strong winds. | |||||||||||||||||||
Mon 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | ||||||||||||||
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 16 | S 15 | S 14 | S 14 | S 13 | ENE 7 | SSW 23 | SSW 22 | ENE 7 | ENE 7 | SSW 18 | SSW 18 | ENE 7 | ENE 8 | ENE 8 | SSW 18 | E 17 | E 16 | E 16 | E 16 |
Wave Graph | ||||||||||||||||||||
321 | 339 | 329 | 311 | 277 | 171 | 426 | 363 | 412 | 395 | 532 | 329 | 456 | 495 | 391 | 572 | 992 | 1301 | 1451 | 1566 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:19PM0.34m | 11:13AM0.49m | 8:56PM0.27m | 12:12PM0.54m | 10:06PM0.22m | 1:02PM0.59m | 11:46PM0.19m | 1:44PM0.62m | 00:59AM0.18m | 2:22PM0.66m | 1:51AM0.19m | 2:56PM0.68m | 2:32AM0.21m | |||||||
Low Tide | 3:52PM0.27m | 3:23AM0.04m | 6:20PM0.26m | 4:02AM0.05m | 8:25PM0.21m | 9:13PM0.17m | 5:34AM0.05m | 9:41PM0.14m | 6:23AM0.04m | 10:05PM0.12m | 7:08AM0.02m | 10:27PM0.11m | ||||||||
— | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | |
mm | — | 1 | 1 | — | 3 | — | — | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 27 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 24 |
Feels °C | 23 | 24 | 26 | 25 | 25 | 22 | 22 | 24 | 21 | 21 | 22 | 21 | 22 | 22 | 21 | 23 | 23 | 22 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | S 16 | ENE 7 | ENE 7 | S 14 | S 13 | E 12 | E 11 | E 12 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 19 | SSW 18 | E 17 | E 16 | E 16 | E 16 |
321 | 158 | 132 | 311 | 277 | 138 | 123 | 180 | 412 | 395 | 464 | 329 | 340 | 232 | 391 | 572 | 992 | 1301 | 1451 | 1566 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | S 15 | S 14 | SW 16 | E 13 | S 13 | SSW 23 | S 13 | S 12 | S 11 | S 13 | S 12 | S 12 | S 20 | SSW 16 | E 14 | NNE 9 | SSW 16 | SSW 16 | SSW 16 |
81 | 339 | 329 | 67 | 121 | 128 | 426 | 157 | 97 | 93 | 85 | 143 | 102 | 296 | 223 | 102 | 144 | 469 | 427 | 416 | |
Swell 3 Height (m) Direction Period (s) | W 12 | SW 16 | SW 17 | E 11 | SW 15 | S 11 | S 13 | SSW 22 | SSW 16 | SW 16 | S 11 | SSW 16 | S 21 | S 12 | E 14 | E 18 | SSW 18 | S 11 | SE 12 | SE 12 |
11 | 69 | 72 | 39 | 60 | 58 | 125 | 363 | 99 | 127 | 56 | 94 | 231 | 100 | 148 | 154 | 547 | 35 | 5 | 6 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 |
193 | — | — | 136 | 158 | 171 | 125 | 240 | 350 | 339 | 532 | 281 | 456 | 495 | 336 | 402 | 291 | 403 | 372 | 297 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 33 | 1 | 1 | 30 | 30 | 30 | 30 | 32 | 38 | 39 | 31 | 39 | 127 | 30 | 30 | 127 | 30 | 30 | 39 | 1 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Rockpiles Surf forecast
The above surf forecast table for Rockpiles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rockpiles can be found by selecting the local surf guide option on the grey menu. Our Rockpiles 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 (Rockpiles) 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 Rockpiles 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.
Rockpiles is 4 km (2 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.










