Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 1 am 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
27.4°C
0.6° 

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


Rockpiles surf forecast from 25 Aug 2026:

  • Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 kJ wave energy.

Best Forecast Surf Conditions for Rockpiles this week:

The most powerful waves expected at Rockpiles in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Thursday (Aug 27) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11AM (Thu 27th Aug)3.5ft (1.1m) 17s

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


The Lowdown

Alright, let’s switch to feet and Fahrenheit for the imperial crew.

So, the next week or so is looking pretty average. We’ve got a persistent ENE breeze blowing cross-offshore, keeping the surface clean, but the swell is messy and short-period. Most of the time we’re looking at weak, choppy waves in the 5ft to 6ft range, with a period of just 7 seconds – that’s windswell, not groundswell. The combined energy is moderate, sitting around 562 to 698, but it’s just not organised. The water temp is warm at 81°F, which is about average for this time of year, so at least you won’t need a wetsuit.

The first real standout in the whole forecast doesn’t pop up until Wednesday, September 2nd. That afternoon, the ENE wind drops to a gentle 9 mph, still cross-off, and we finally get a proper S-SW groundswell. The swell is small at 3ft, but the period jumps to 16 seconds – that’s proper long-period energy. The combined energy is moderate (584), but the quality is what counts. The forecast says “expect very good surf conditions,” and with light winds, it’s going to be glassy and clean. This is the pick of the early window.

From there, we get a bit of a mixed bag. Thursday, September 3rd, sees a light SE breeze swing cross-on, which will put a few ripples on the face, but the swell is still small and long-period (4ft at 13 seconds). Not the best, but manageable. Then Friday the 4th through Sunday the 6th, the ENE wind picks back up to 15-18 mph, and the swell direction swings back to ENE with a short period (7-9 seconds). That’s a downgrade – just mediocre, messy surf.

The next real highlight comes on Saturday, September 5th, but it’s the afternoon of Sunday the 6th that gets my blood pumping. By Sunday morning, we’ve got a 6ft ENE swell with a period of 12 seconds, and the energy jumps to 1621 – that’s strong. The wind is cross-off at 12 mph, keeping it clean. That afternoon, the swell holds at 6ft with an 11-second period, energy at 1358. This is the best-looking run of the whole forecast. The ENE direction is a bit off the optimum for Rockpiles, which prefers SSE, but with that much energy and clean conditions, it’s going to be punchy and fun. Just be aware – at 6ft to 6ft, it’s getting into intermediate territory, and if you’re a beginner, it might be a bit much.

Monday, September 7th, is another solid day – a light ESE cross-shore breeze, 5ft ENE swell, 11-second period, and energy over 1000 (1006). Clean, cross-shore, with some good lines. And Tuesday the 8th, another 5ft, 12-second groundswell with the same cross-off wind. The run from September 6th to the 8th is the clear winner – three days of proper, clean surf.

The very end of the forecast, September 9th, shows a 7ft ENE swell, but the wind is cross-shore at 15 mph, which will put a chop on the face. That’s a bit big and messy for most, but if you’re an expert, you might find some barrels in the morning before the wind picks up. Afternoon is cleaner with the cross-off, but still 7ft – that’s expert territory.

So, to wrap it up: the first week is mostly a write-off. Wednesday, September 2nd afternoon is your first good session, but the real gem is the weekend of September 6th and 7th. That’s where the energy, period, and wind all line up. Get on it if you can.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Tue morning, min 25°C on Tue night). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Fri morning, min 25°C on Fri morning). Mainly fresh winds.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
1
1
1
1
1
1
1
1
1
0
0
1
1
1
1
0
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
E
7
1.6
ENE
7
1.7
E
7
0.7
SSW
14
0.7
S
18
0.7
S
19
1.1
S
17
0.9
S
16
1
S
16
0.8
S
14
0.9
S
14
0.8
S
13
1.8
ENE
7
1.7
ENE
7
1.9
ENE
7
2.2
ENE
7
1.8
ENE
7
1.7
ENE
7
1.6
ENE
7
1.7
ENE
7
1.9
ENE
8
Wave Graph
Metric surfscale
Energy kJ
302
238
274
218
307
351
716
427
482
260
329
233
276
277
336
433
307
277
229
278
434
Wind (km/h)
40
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
30
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
35
ENE
30
ENE
35
ENE
25
ENE
35
ENE
35
ENE
20
ENE
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
cross-off
High Tide
2:56PM0.68m
2:55AM0.33m
3:24PM0.68m
3:31AM0.37m
3:53PM0.66m
4:08AM0.41m
4:20PM0.62m
4:47AM0.46m
4:49PM0.57m
5:30AM0.50m
5:18PM0.51m
6:18AM0.53m
5:48PM0.44m
Low Tide
9:53PM0.11m
8:24AM0.05m
10:12PM0.10m
9:05AM0.06m
10:32PM0.08m
9:46AM0.07m
10:54PM0.07m
10:31AM0.10m
11:17PM0.05m
11:22AM0.14m
11:42PM0.05m
12:22PM0.19m
00:10AM0.05m
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:13
6:13
6:13
6:13
6:13
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:52
6:51
6:50
6:49
6:47
 mm
Temp °C
26
26
26
26
26
25
26
26
25
26
26
25
26
26
25
26
26
26
26
26
26
Feels °C
24
22
24
23
23
22
24
23
23
23
23
23
23
22
22
23
23
24
24
23
24
  • Map Icons:
  • Break
  • 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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