Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 7 am 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
27.1°C
0.2° 

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:

  • Most powerful swell: Saturday 5 Sep, 11PM (local time) - 8ft (2.4m), 14s period, ENE swell with 2,079 kJ wave energy.

Best Forecast Surf Conditions for Rockpiles this week:

The most powerful waves expected at Rockpiles in the next 16 days are 2.4m 14s and forecast to arrive on Saturday (Sep 05) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 10s period and expected on Saturday (Sep 05) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Sat 5th Sep)8ft (2.4m) 14s

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


The Lowdown

G’day, this is Rusty. Looks like we’ve got a bit of a waiting game on our hands here at Rockpiles. The first week and a half is gonna be a bit of a mixed bag, with some solid swell running but the wind and conditions just aren’t lining up to give us that clean, perfect session. We’re looking at a proper payoff in the second week, though, so don’t write it off just yet.

The water temp is sitting at 81°F right now, which is pretty much dead on average for this time of year, so no surprises there.

We kick things off on Tuesday morning, September 1st. There’s a 6-foot swell from the ENE, with a short 8-second period, and the wind is a cross-off from the NE at 19 mph. The combined energy is moderate (841). It’s surfable but the conditions are described as marginal, so keep your expectations in check. The wind builds through the week, and by Wednesday and Thursday, we’ve got a 7-foot to 8-foot ENE swell, but the wind is a strong breeze at 25 mph. That’s a lot of chop and push for a reef break, making things pretty challenging.

Friday the 4th and Saturday the 5th see the swell drop a touch to 7 feet, still from the ENE, but the period stretches out to 13 seconds on Saturday. That’s a proper groundswell, and with 19 mph cross-off wind, it’s clean. The energy jumps to over 2000 (2063 on Saturday morning). This setup gets a score of 3 out of 10, so it’s an improvement but still not quite firing.

Sunday the 6th and Monday the 7th stay in that same zone: 7-foot to 6-foot ENE swell, 12-second period, with moderate to fresh cross-off wind. The energy is solid, around 1900, but the commentary still calls it marginal. It’s frustrating because the swell is there but the wind just isn’t letting it be top-notch.

Then we roll into Tuesday the 8th, and the swell direction swings to the SSW at 5 feet to 5 feet, with a very long 15-second period. Wind is a light cross from the ESE at 9 mph, but it’s creating a slight cross-chop. Energy is 1786 to 2210, which is a lot of juice for that size. This is a better swell direction for the optimum SSE, but it’s not quite right for Rockpiles, and the cross-chop spoils it.

The real standout comes on Saturday, September 12th. By this stage, the wind has eased to a gentle to moderate breeze from the ENE at 9-12 mph, and the swell is a proper 13 feet from the ENE with a 10-second period. The combined energy is massive: 4164 on the morning and 3410 on the afternoon. This is a big, powerful swell. It gets the highest score in the whole outlook (4 out 10), and honestly, for a reef break like Rockpiles, this is the one to aim for. The cross-off wind will keep it clean, but make no mistake, 13 feet is expert territory only. If you’re not confident in big, hollow reef waves, give this a miss.

After that, the plug gets pulled. Sunday the 13th through to Wednesday the 16th, the swell drops to nothing – 2 feet to 3 feet, from the SW and SSW, with long periods (15-20 seconds) but hardly any energy (103 to 533). The wind is cross-off, but it’s just flat. That’s a real end to the run.

So, the best bet is Saturday, September 12th. Clean, big, cross-off wind, and a solid wall of ENE swell. Just be ready for the size. The rest of the window is a mix of near-misses and frustrating wind.

Stay safe out there.
Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

Mostly dry. Warm (max 27°C on Sat afternoon, min 25°C on Fri morning). Winds decreasing (strong winds from the ENE on Fri morning, light winds from the ENE by Sun night).

Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
2
0
0
1
1
1
1
1
2
2
2
2
3
3
2
3
2
3
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
ENE
8
1.9
ENE
8
2.2
ENE
8
2.1
ENE
8
2
ENE
8
2.5
ENE
8
2.2
ENE
7
2.5
ENE
8
2.4
ENE
8
2.5
ENE
8
2.2
ENE
8
1.3
E
14
2.1
ENE
13
2.2
ENE
13
2.3
ENE
13
2.2
ENE
13
2.1
ENE
12
2.1
ENE
12
2.1
ENE
12
1.9
ENE
12
1.8
ENE
11
Wave Graph
Metric surfscale
Energy kJ
402
453
574
520
502
828
500
789
640
675
526
649
1496
1630
1804
1485
1220
1200
1220
937
828
Wind (km/h)
30
NE
35
NE
30
ENE
40
ENE
40
ENE
40
ENE
40
ENE
45
ENE
40
ENE
40
ENE
35
ENE
35
ENE
30
ENE
30
ENE
20
NE
25
ENE
30
NE
20
ENE
20
E
20
ENE
15
ESE
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
cross-off
cross-on
High Tide
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
1:47PM0.73m
2:09AM0.32m
Low Tide
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
6:25AM0.07m
8:57PM0.08m
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
cloud
thunderstorm
<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
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:46
6:45
6:45
6:44
6:44
6:43
6:42
 mm
1
Temp °C
26
27
26
26
26
25
26
26
25
26
26
25
26
27
26
27
27
26
27
27
26
Feels °C
24
25
24
24
22
22
22
22
21
21
21
21
24
25
25
27
26
26
28
28
27
  • 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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