Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 1 pm 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
27.0°C
0.1° 

Rockpiles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Rockpiles surf forecast from 1 Sep 2026:

  • Best quality surf: Monday 7 Sep, 5PM (local time) - 7.5ft (2.3m), 11s period, ENE swell with offshore winds.
  • Most powerful swell: Saturday 5 Sep, 11AM (local time) - 8ft (2.4m), 13s period, ENE swell with 1,901 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 5PM (local time) - 7.5ft (2.3m), 11s period with ENE 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 Monday (Sep 07) at 5PM. The primary swell is predicted to be 2.3m and 11s period with a secondary swell of 1.1m and 17s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Rockpiles in the next 16 days are 2.4m 13s and forecast to arrive on Saturday (Sep 05) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Mon 7th Sep)7.5ft (2.3m) 11s
Best Surf 5PM (Mon 7th Sep)7.5ft (2.3m) 11s
Most Powerful11AM (Sat 5th Sep)8ft (2.4m) 13s

Table - best surf conditions forecast for Rockpiles over the next 16 days.


The Lowdown

Alright, Rusty here, let's take a look at what Rockpiles has in store for us over the coming weeks.

Right now, there’s a bit of a wait for the good stuff. We’ve got a long stretch of blustering cross-offshore winds and a short-period, wind-affected swell that just doesn’t want to clean up. The early part of the forecast through the first week is largely a write-off. The surf is there, but the quality is poor, with scores hitting the floor. You're looking at a lot of reports saying “poor surf conditions” or “marginal” through until the end of the first week of September. This ain't worth paddling out for.

Now, the real standout comes on the 5th of September (Saturday). The combined swell energy jumps way up to 2458 – that’s strong energy – and we finally get a longer period of 13-seconds pushing in from the ENE. The swell holds at a solid 8 ft, which is pushing into the big range, so this is more for the experienced crew. The wind is still cross-off from the ENE but backing off to a moderate breeze (16 mph). This is the best of the first batch. It’s still not perfect, but it’s a big step up and the wave comment for that Saturday morning is a ‘marginal surf forecast’.

The Big Ticket, Late in the Game

The true highlight of this entire outlook is Monday the 7th of September. We get a very notable setup. The swell remains a chunky 8 ft to 8 ft from the ENE, still with a long 12-second interval. But the magic happens with the wind. The morning shifts from a moderate cross-off to a glass-off in the afternoon. The wind swings to the north and drops to a mere 3 mph—that's effectively offshore and glassy. The wave comment for that Monday afternoon is “excellent surf conditions for experienced surfers.” The energy is still high at 1970, so it’s powerful. Because this is a reef break, that long-period energy will line up and hold its shape really well. For anyone who can handle it, this is the session to target. Just know that it does get crowded here sometimes.

After that peak, the swell tapers off. We get a small run of SSW groundswell around the 8th and 9th of September, but the wind turns onshore, making it messy. The 8th of September sees an onshore S wind ruining the 3 ft to 4 ft of SSW groundswell. Energy drops right back down to the 500-700 range. Not worth the paddle.

Into the second week, from about the 10th of September onward, it gets real quiet. The swell drops below 3 ft, periods get short again, and the combined energy sinks to weak levels. A brief flicker on the 13th of September (Sunday) afternoon shows a clean 2 ft groundswell from the SSW with a 15-second period and light wind. It’s small, but it’s the only real clean option in that second week. The energy there is only 242, so it's soft, but it might give a longboarder a few clean crumbly ones if the tide's right.

So, bottom line: the first week is a bust until the 5th and 7th of September. The 7th of September Monday afternoon is the clear standout, though it's for advanced surfers only due to the size and power. The second week is mostly flat with a tiny, clean window on the 13th of September. Rockpiles can be fickle; this is a typical pattern for the area where you have to wait for the right combo.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 27°C on Tue afternoon, min 25°C on Mon night). Mainly strong winds.

Days 5-7 Weather Summary

Some drizzle, heaviest during Sun morning. Warm (max 27°C on Sat afternoon, min 25°C on Thu afternoon). Winds decreasing (strong winds from the ENE on Thu afternoon, moderate winds from the ENE by Sat night).

Mon
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
1
1
1
0
1
1
1
1
1
1
1
2
2
2
3
2
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
ENE
8
2
ENE
8
2
ENE
8
1.9
ENE
8
2
ENE
8
2.1
ENE
8
2.3
ENE
8
3
ENE
8
2.5
E
8
2.4
ENE
8
3
ENE
8
2.5
ENE
8
2
ENE
8
2.3
ENE
13
2.4
ENE
13
2.3
ENE
13
2.3
ENE
13
2.3
ENE
13
2.3
ENE
13
2.3
ENE
12
Wave Graph
Metric surfscale
Energy kJ
428
439
475
453
475
494
620
1029
877
640
1003
893
474
1713
1901
1697
1697
1723
1610
1493
Wind (km/h)
35
ENE
30
ENE
30
ENE
35
ENE
35
ENE
40
ENE
40
ENE
40
ENE
45
ENE
45
ENE
40
ENE
45
ENE
40
ENE
35
ENE
30
ENE
25
ENE
20
ENE
30
ENE
35
ENE
25
NE
Wind State
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
5:48PM0.44m
7:14AM0.56m
6:20PM0.36m
8:21AM0.59m
6:54PM0.28m
9:39AM0.62m
7:57PM0.22m
10:58AM0.66m
10:35PM0.19m
12:05PM0.69m
00:18AM0.21m
1:00PM0.73m
1:21AM0.26m
Low Tide
00:10AM0.05m
1:40PM0.23m
00:43AM0.05m
3:38PM0.25m
1:25AM0.06m
6:22PM0.22m
2:24AM0.08m
7:30PM0.17m
3:46AM0.09m
8:03PM0.13m
5:11AM0.08m
8:31PM0.10m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
thunderstorm
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:15
6:15
6:15
6:15
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:47
6:46
6:45
6:45
6:44
6:44
6:43
 mm
1
Temp °C
26
25
26
27
26
26
26
26
26
26
25
25
26
25
26
27
26
27
27
26
Feels °C
22
22
24
25
24
24
23
23
22
21
21
20
21
21
24
25
26
26
25
25
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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